CAD 805RS_manual 805RS Manual
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OWNER’S MANUAL
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CAD-805RS
Mono Power Amplier
NOTE: Before installing your new component, please read this manual
carefully as it will inform you of the product specications, proper
installation and correct operating procedures for your unit. Also included
in this manual are guidelines on how to service and care for your new
Cary Audio Design product.
TABLE OF CONTENTS
Important Safety Instructions .................................................................................................... 2
Welcome
Thank You ................................................................................................................................. 5
Features
Product Features ........................................................................................................................ 6
Specifications
Basic Specifications ..................................................................................................................... 7
Installation
Unpacking ................................................................................................................................. 8
Warranty Card ........................................................................................................................... 8
Placement ................................................................................................................................. 8
Power Requirements ................................................................................................................... 8
Speaker Cables .......................................................................................................................... 8
Interconnect Cables .................................................................................................................... 9
Operation
Front Panel ...............................................................................................................................10
Top Panel .................................................................................................................................10
Rear Panel ................................................................................................................................10
Break-In Period .........................................................................................................................11
Service and Care
Care and Cleaning .....................................................................................................................12
Tube Replacement .....................................................................................................................12
AC Power Fuse Replacement .......................................................................................................12
Factory Service .........................................................................................................................12
Non-Warranty Repairs ................................................................................................................13
Troubleshooting Guide ..............................................................................................................14
Diagrams
Top Cover Installation ................................................................................................................15
Tube Replacement .....................................................................................................................16
300B Tube Socket Pin Layout in Chassis........................................................................................17
Bias Adjustment ........................................................................................................................18
Limited Warranty.......................................................................................................................19
IMPORTANT SAFETY INSTRUCTIONS
Please read these important safety instructions before operating this equipment.
1. Before powering up the equipment, read all safety and operating instructions and follow them as instructed. Retain the
safety and operating instructions for future reference.
2. Do not place the unit on an unstable cart, stand, tripod, bracket, or table. The unit may fall, causing injury to a person
or damage to the unit. Mount the unit according to the manufacturer’s instructions with the suggested mounting
accessory.
3. Mount the unit to a wall or ceiling only in the manner recommended by the manufacturer.
4. Do not use the unit near water (for example, near a swimming pool, bath tub, wash bowl, kitchen sink, or laundry tub)
or in a damp environment (like a basement or outside in the rain).
5. Clean only with a dry cloth.
6. Do not push objects of any kind into the unit through openings as they could touch dangerous voltage points and short-
out parts, possibly resulting in a fire or electric shock. Avoid spilling liquid of any kind on the unit. If water or any metal
object (such as a paper clip, coin, or staple) accidentally falls inside the unit, disconnect it from the AC power source
immediately and contact Cary Audio Design for further instructions.
7. Position the unit away from heat sources such as radiators, heat registers, stoves, or other units (including amplifiers)
that produce heat.
8. This unit is not intended to be used on soft supported items (like blankets, pillows, etc.).
9. This unit is not suitable for use in locations where children are likely to be present.
10. Slots and openings in the cabinet create ventilation to protect the component from overheating. These openings on the
top and bottom panels must remain unobstructed. Allow at least 6 inches (16cm) of clearance above the unit and an
opening behind the unit for airflow. Do not place the unit on a bed, sofa, rug, built- in bookcase, or rack
without adequate ventilation.
11. Use only those attachments recommended by the unit manufacturer, as others may cause hazards.
12. This unit requires a reliable connection to the socket/outlet with protective earthing by means of the
specified power cord set.
13. As a safety feature, the unit may be equipped with a polarized alternating current line plug in which one blade is wider
than the other. This plug will fit into the power outlet only one way. If you cannot insert the plug fully into the outlet,
try reversing the plug. If the plug still will not fit, contact a licensed electrician to update your obsolete outlet. Do not
defeat the safety purpose of the polarized plug.
14. Operate the unit only from the power source indicated on the marking label. If you are unsure of the type of power
supplied to your home, consult your unit dealer or local power company.
15. Arrange power supply cords so that they do not suffer from foot traffic or pinching by items placed on or against them.
Pay close attention to cords where plug enter the AC outlet and where they exit from the unit.
16. For added protection during a lightning storm or when the component is idle for long periods of time, unplug the unit
from the wall outlet and disconnect the antenna or cable system. This will help protect the unit from lightning and
power line surge damage.
17. Do not locate an outside antenna system in the vicinity of overhead power lines or other electric light or power circuits.
When installing an outside antenna system, take extreme care to avoid touching the power lines or circuits; contact with
them could be fatal.
18. Do not overload wall outlets, extension cords, or integral convenience receptacles as this increases the risk of fire or
electric shock.
19. External wiring connected to terminals of this unit shall be installed by a skilled person.
20. When replacement parts are required, be sure the service technician has used replacement parts specified by the
manufacturer or those having the same characteristics as the original parts. Unauthorized substitutions may result in
fire, electric shock or other hazards.
21. Upon completion of any service or repairs to the unit, ask the service technician to perform safety checks to
ensure the unit is in proper operating condition.
2
IMPORTANT SAFETY INSTRUCTIONS
22. Before connecting a new product to your audio or home theater system, turn off all other equipment (preferably
unplugging them from the AC power source). Many audio components feature automatic turn-on circuits that may
activate during an installation, potentially causing damage to electronic components and/or speakers. This type of
damage is not covered by product warranties, and Cary Audio specifically disclaims responsibility
for any such damage.
23. The removable power cord provided with your unit was specifically designed for use with this
product, but other AC cords
ma
y be used. Consult your dealer for advice on AC power cords and
high quality wire in your system.
24. The fuse is located inside the chassis and is not user serviceable. If the unit does not power up, contact an
authorized service representative
25. Cables running inside walls should have the appropriate markings to indicate compliance and listing by the UL,
CSA or other standards required by the UL, CSA, NEC or your local building code. Questions about cables inside of
walls should be referred to a qualified custom installer, a licensed electrician, or low-voltage contractor.
26. Recording of copyrighted material for other than personal use is illegal without permission of the copyright
holder.
CAUTION: High current. Connect to earth before connecting to supply of unit. Unplug
the
unit before performing any service.
Unit can be hot. Be careful of burned fingers when handling parts.
Wait one half hour after switching off to handle parts.
NOTE TO CATV SYSTEM INSTALLER: This reminder is provided to call the CATV system installer's attention to
article 820-40 of the NEC, ANSI/NFPA 70, which provides guidelines for proper grounding and, in particular, specifies
that the cable ground shall be connected to the grounding system of the building as close to the point of cable entry
as practical.
FCC INFORMATION FOR USER:
• CAUTION: Any changes or modifications not expressly approved by
Cary Audio Design could void the user's authority to operate the
equipment.
• NOTE: This equipment has been tested and found to comply with the limits for a
Class B digital device pursuant to Part 15 of the FCC Rules.
• These limits are designed to provide reasonable protection against harmful interference in a residential
installation. This equipment generates and can radiate radio frequency energy, and if not installed and
used in accordance with the instructions it may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the interference by one or
more of the following measures:
• Reorient or relocate the receiving antenna.
• Connect the equipment into an outlet on a circuit different from where the receiver is
connected.
OUTDOOR ANTENNA INSTALLATION/SAFE ANTENNA AND CABLE CONNECTION:
• If an outside antenna or cable system is connected to the
equipment, be sure the antenna or cable system is grounded
in order to provide protection against built-up static charges
and voltage surges. Article 810 of the National Electrical
Code, ANSI/NFPA 70 (in Canada, Part 1 of the Canadian
Electrical Code) provides information regarding proper
grounding of the mast and supporting structure, grounding of
the lead-in wire to an antenna discharge unit, size of
grounding conductors, location of antenna discharge unit,
connection to grounding electrodes and requirements for the
grounding electrode.
• Outside antenna system should be located well away from
power lines, electric light or power circuits and where it will
never come into contact with these power sources if it should
happen to fall. When installing an outside antenna, extreme
care should be taken to avoid touching power lines, circuits
or other power sources as this could be fatal. Because of the
hazards involved, antenna installation should be left to a
professional.
3
IMPORTANT SAFETY INSTRUCTIONS
Disposal Instructions
NORTH AMERICAN WASTE OF ELECTRICAL AND ELECTRONIC EQUIPMENT DIRECTIVE
When discarding the unit, comply with local rules or regulations. Batteries should never be thrown away or
incinerated but disposed of in accordance with the local regulations concerning battery disposal.
EUROPEAN UNION (EU) WASTE OF ELECTRICAL AND ELECTRONIC EQUIPMENT (WEEE) DIRECTIVE
The European Union’s WEEE directive requires that products sold into EU countries must have the crossed out trashbin
label on the product (or the package in some cases). As defined by the WEEE directive, this cross-out trashbin label
means that customers and end-users in EU countries should not dispose of electronic and electrical equipment or
accessories in household waste. Customers or end-users in EU countries should contact their local equipment supplier
representative or service centre for information about the waste collection system in the country.
4
WELCOME
THANK YOU
Cary Audio would like to thank you for purchasing our products.
Since its founding in 1989, Cary Audio has stayed at the forefront of home entertainment
equipment by stubbornly adhering to the principles of quality and musicality upon which it was
founded. It’s not enough just to be able to build great sounding gear, but it needs to be well-
made, reliable, and maintain its performance and value for many years. Cary Audio has certain
criteria that have guided us since we began and are still our primary focus.
We firmly believe in high performance products that offer incredible value for the money, backed
by superior engineering and design, and supported by exceptional customer service. Whether a
headphone amplifier or a world-class network audio player, Cary Audio uses the highest quality
components available within the audio circuit, resulting in extraordinary sound quality. This is a
well-known hallmark of all Cary Audio products.
For more than a quarter of a century, Cary Audio has provided the best in high performance
music systems. We remain committed to our goals of building the very best products, at real-
world prices, and supporting them with world-class service. Let our passion for the very finest
sound help you better enjoy your music! Thank you for your continued support!
The Cary Audio Team
5
FEATURES
The CAD-805 Reference Series (CAD-805RS) is the latest edition in the 805 series of single-ended
mono block amplifiers that has been in continuous production since 1993.
Here is what you will see with a pair of CAD-805RS moving from front to back. The front panel is
a handsome thick machined aluminum that is available in either silver or black anodized finish.
The CAD-805RS is equipped with a built-in meter on the front of the chassis. The adjustment pot
is located at the rear of the chassis along with a bias jack for an external meter. Looking at the
amplifier from above, you see a top-plate, which is finished in a handsome Anthracite Black gloss
enamel, with white silkscreened lettering. To the left, the main power switch, to the right the
'standby/operate' switch which powers up the 211 or 845 output tubes. To the left is a rotary
switch with a green jewel-like knob that chooses the appropriate bias for your choice of 211 or
845 output tubes. To the right is a similar rotary knob that dials in 'negative feedback' on a global
basis and is adjustable from "off" in a continual rotation to a max of 10 dB of feedback. Also, on
this top front portion of the amplifier are two 6SN7 input stage tubes, a 300B driver stage tube,
and your choice of either an 845 or 211 output tube.
Behind the tubes, the main real-estate of the 805 is occupied by two very impressively sized
transformers—one power, and one output, and four electrolytic capacitors. Also, toward the rear
of the chassis are the aforementioned setscrew adjustment pot for biasing purposes and the
quarter inch bias jack for reading the bias of the 300B driver tube. These are the only user
adjustments you will have to worry about, other than choosing your output tube flavor.
The back panel offers a choice of 4, 8, or 16 ohm speaker outputs that are very high quality and
heavy duty. There is a RCA input jack and a XLR input jack with a user selectable switch, and two
visible fuses—one for the 300B and one for the output tube. There is also a built-in fuse within
the AC power socket. The power cord is detachable.
To review the circuit, the single-ended audio input signal from the outside world is passed to the
control input grid of the first 6SN7 tube. This first 6SN7 stage is operating in a parallel dual triode
conventional resistance-coupled Class A amplifier. This first gain stage is directly coupled to the
next 6SN7 dual triode gain stage. This second stage is operating in a series anode constant-
current Class A amplifier. This amplified audio signal is passed through a coupling capacitor to
the grid of the 300B driver stage. The 300B triode tube operates in a Class A single-ended mode
utilizing fixed negative grid voltage on the 300B driver stage. This negative grid voltage is user-
adjusted by the screwdriver pot at the rear of the CAD-805 AE. The 300B is directly coupled to
the grid of either a 211 or 845, 100-watt plate dissipation, triode output tube. The method of
coupling at this stage is called an interstage transformer. This is an air-gap design with a flat
frequency response from 30Hz to 23 KHz. The audio signal from the 300B interstage transformer
will drive the 211/845 output tube to 27 watts Class A output. With additional volume levels, the
amplifier goes into a positive grid mode with a power output of 50 watts Class A2. In the case of
the 211-output tube, the Class A2 power is on the order of 70 watts at clipping. The high-power
output from the 211/845 tube is coupled to the loudspeaker via an air-gapped 150 watt
continuous duty output transformer. This transforms the high impedance (8000 ohm primary
winding) of the output tube to 4,8, or 16 ohms to drive the loudspeaker.
6
SPECIFICATIONS
This section describes the basic specifications of the CAD-805RS at the time of printing.
Specifications are subject to change without notice or obligation. When the following cautionary
terms are used in this manual, these definitions apply:
WARNING
• Electrical hazard! Misuse or failure to follow instructions properly may
result in personal injury or death!
CAUTION
• No risk or personal injury; however, misuse or failure to follow instructions
may result in damage to equipment.
NOTE
• No risk of personal injury or equipment damage; however, misuse or failure
to follow instructions may prevent proper performance of the equipment.
..................................................................................................................................................................
Circuit Type Single-Ended Pure Class A
..................................................................................................................................................................
Power Output 50 Watts Pure Class A
..................................................................................................................................................................
Feedback 0 to 10 dB, continuously variable control
..................................................................................................................................................................
Frequency Response 20 Hz to 20 kHz +/- 0.5 dB at Full Power Output
..................................................................................................................................................................
Power Consumption 230 watts - OPERATE, 76 watts - STANDBY
..................................................................................................................................................................
Input Impedance 150k ohms
..................................................................................................................................................................
Output Impedance 4, 8 and 16 ohm speaker connection terminals
..................................................................................................................................................................
Signal to Noise > 80 dB below rated output
..................................................................................................................................................................
Sensitivity 1.0 Volt @ zero feedback for full output
..................................................................................................................................................................
Power Supply Capacitors 4 - 1500 µFd @ 450V
..................................................................................................................................................................
Transformers 1 - EI Laminated core power transformer
1 - Special air-gap output transformer
200% duty cycle on all transformers
..................................................................................................................................................................
Tube Complement 2 - 6SN7 input tubes
In each amplifier chassis 1 - 300B driver tube
1 - 845 output tube or (Please choose 845 or 211 during install)
1 - 211 output tube (Please choose 211 or 845 during install)
..................................................................................................................................................................
Warm-Up Time 5 minutes, after initial break in period
..................................................................................................................................................................
Break-In Period 100 hours of music playing time
..................................................................................................................................................................
Finish Jaguar ‘Anthracite Black’ chassis
..................................................................................................................................................................
Dimensions 10” H x 12-1/4” W x 24” D
..................................................................................................................................................................
Net Weight 85 lbs. (38.6 kg.)
7
INSTALLATION
This section describes the unpacking and installation procedures for your new component.
UNPACKING
All Cary Audio Design shipping containers have been specially designed to protect their contents
and special care has been taken to prevent damage under normal shipping conditions.
Mishandling should be evident upon inspection of the shipping container. If shipping damage is
found after visual inspection, take care not to destroy the evidence. If necessary, document the
damage with photographs and contact the transport carrier immediately.
Carefully remove your new component from its packing carton and examine it closely for signs of
shipping damage. We strongly recommend saving all original packing cartons to protect your
amplifier from damage should you wish to store it or ship it for after-sales service.
WARRANTY CARD
IN THE USA AND CANADA: If you are the original purchaser of a new unit purchased from an
authorized Cary Audio dealer or from CaryDirect.com, please fill out the enclosed warranty
registration card and return it to Cary Audio within 15 days of your purchase. Cary Audio also
suggests that you keep your original packing cartons in case you ever need to ship the unit.
Warranty restrictions apply. Consult the warranty section at the end of this manual for details.
Please be certain to keep a copy of the original sales receipt from your direct purchase from Cary
Audio or your authorized Cary Audio dealer to validate the warranty if ever needed. The warranty
is for the original purchaser only and does not transfer to any subsequent owner.
OUTSIDE THE USA AND CANADA: Your local authorized Cary Audio distributor will make his
own warranty policy for your country. Please check with them for the terms of warranty for your
new amplifier.
PLACEMENT
In general, the location of your new CAD-805RS is not critical. Certain precautions must be taken
to ensure optimum performance. Avoid extremely hot locations such as near radiators or other
heating units. Keep the top of the CAD-805RS clear of books, paper or other equipment to
protect against overheating! DO NOT place your CAD-805RS in a closed bookcase - overheating
will damage the amplifier! Allow 8 to 10 inches above the unit for proper ventilation.
POWER REQUIREMENTS
The CAD-805RS is designed to operate from house current mains. The design voltage is 120/240
volts AC at 50/60Hz.
SPEAKER CABLES
The speaker cables from the output posts of the CAD-805RS to the speaker system can be any
convenient length your set-up requires. Select speaker cables of sufficient size to preserve the
outstanding performance capabilities of your CAD-805RS. Heavy gauge #16 wire is suitable for
distances up to 10 feet; #12 for 25 feet. Most audio dealers will have proper speaker cable in
stock for this purpose.
8
INSTALLATION
INTERCONNECT CABLES
Signal input connection is made via the switchable RCA or XLR input jack on the rear of the
amplifier located next to the output binding posts. The input interconnect cables from the output
of the preamplifier can be any length your installation requires. A shielded high-quality
interconnect cable is important to reduce chances for hum or interference. Ask your Authorized
Cary Audio dealer for advice.
Your new amplifier is ready for operation after the speaker cables, interconnect cables and the
tubes have been installed. Choose either the 211 or the 845 output tube with the top panel tube
selector switch, according to the actual one installed. Only change this switch setting with the
amplifier OFF.
WARNING
• FAILURE TO INSTALL THE TUBES CORRECTLY WILL DAMAGE THE UNIT. Watch the
tube pins carefully on the 300B tube during installation as it is possible to force the
tube to plug in ‘wrong’ during installation. The 300B tube has no ‘safety key’ center
pin on the tube to prevent incorrect installation. It has two large pins and two
slightly smaller pins. Please look carefully at the tube pins and the tube socket holes
to note the two different size connections prior to installation. Incorrectly plugging
in the 300B driver tube will possibly damage the amplifier and is not covered by the
manufacturer’s warranty. Please see the DIAGRAMS section for further instructions
on tube placements.
9
OPERATION
FRONT PANEL
BIAS METER The bias meter is preset at the factory for 60 mA (300B driver
tube). Check and readjust to 60 mA again after the CAD-805RS
is warmed up for 15 minutes, if necessary.
TOP PANEL
OFF-ON TOGGLE SWITCH Push the AC toggle switch toward the rear, to the “ON” position.
The 6SN7 input tubes and the 300B driver tube will light up in
this setting. The output tube will not light at this point.
STANDBY SWITCH Push the toggle switch toward the rear, to the “OPERATE”
position. The output tube will light up.
TUBE SELECTOR SWITCH Set either to 211 or 845 before installing selected output tube.
FEEDBACK LEVEL Adjusts the level of feedback from 0 to 10 dB
REAR PANEL
INPUT Switchable Signal input connection via shielded RCA interconnect
cable or XLR cable.
OUTPUT Three 5-way binding posts provide output to the speaker system
(4, 8 or 16 ohm connections).
AC FUSE WARNING: When replacing the power fuse, make sure the
unit is NOT PLUGGED IN.
The value for the AC fuse in US or non-US countries that support
AC voltages from 100V-120V is 3A 250V slow blow fuse.
In countries that support AC voltages from 220V-240V, the AC
fuse should be replaced with a 2A 250V slow blow fuse.
The AC fuse is located on the rear panel of the chassis below the
AC inlet.
TUBE FUSE (300B) Replace with ¼ amp fast blow large fuse only.
TUBE FUSE (845/211) Replace with ½ amp fast blow large fuse only.
10
OPERATION
BREAK-IN PERIOD
The tubes, capacitors and output transformers take approximately 100 hours of music playing to
fully settle in for peak performance. The CAD-805RS will sound good from the start and after the
first couple of hours you will notice increased depth and tighter bass. This break-in period defies
all engineering theory but is true with high performance vacuum tube audio amplifiers.
WARNING
• MAKE SURE AMPLIFIER IS UNPLUGGED FROM AC MAINS BEFORE
SERVICING.
11
SERVICE AND CARE
CARE AND CLEANING
The cabinet housing and front panel of the CAD-805RS may be cleaned with a soft cloth and
Windex or a window cleaner. The frequency of cleaning will be governed by how many hours
the CAD-805RS is operated and by operating environment cleanliness.
CAUTION:
• Do not let any liquids spill into the vents on top of the unit.
TUBE REPLACEMENT
If it becomes necessary to replace the tubes in the CAD-805RS amplifier, a matched pair of
output tubes of the same brand should be used. A new tube kit is available from Cary Audio
Design. You should get a few years or more from the output tubes with every day usage and
many, many years of use from the 300B driver tubes and the 6SN7 input tubes.
AC POWER FUSE REPLACEMENT
WARNING: When replacing the power fuse, make sure the unit is NOT PLUGGED IN.
The value for the AC fuse in US or non-US countries that support AC voltages from 100V-120V is
3A 250V slow blow fuse.
In countries that support AC voltages from 220V-240V, the AC fuse should be replaced with a 2A
250V slow blow fuse.
The AC fuse is located on the rear panel of the chassis below the AC inlet.
FACTORY SERVICE
Careful consideration has been given to the design of your CAD-805RS to keep maintenance
problems to a minimum. Any problems or requests for service should be referred to our
Customer Service Department at 919-355-0010. DO NOT return the CAD-805RS to the factory
without a Return Merchandise Authorization (RMA) number from our online Customer Service
Center (www.caryaudio.com).
Cary Audio will assume no responsibility if the shipping company refuses to pay for damage
due to your improper packing or lack of insurance should the unit be lost or damaged in
shipment. Please retain and always use the original shipping carton for shipping the player.
Also, Cary Audio reserves the right to return products sent in for service in a new box set at the
customer’s expense if the original packing material was damaged in the initial shipment, or if it
is deemed unsatisfactory to use in return shipping.
12
SERVICE AND CARE
NON-WARRANTY REPAIRS
Cary Audio will provide repair service for its products charging on a time and expense basis. At
this time, the standard non-warranty service bench fee is $125 for the first hour and $95 per
hour thereafter. Parts used for repairs as well as return shipping are additional. This may
change and is not a quote for service. Please call us at 919-355-0010 for more information
about out-of-warranty service and repair fees.
WARNINGS
• MAKE NO ATTEMPT TO PUT THE CAD-805RS IN SERVICE WITH THE
BOTTOM PLATE REMOVED. CONTACT WITH HIGH VOLTAGES FOUND IN THE
UNIT CAN BE FATAL. COMPLETELY REMOVE AC POWER PLUG FROM THE
WALL AND ALLOW 30 MINUTES FOR THE HIGH VOLTAGE CAPACITORS TO
DISCHARGE THROUGH BLEEDER RESISTORS BEFORE ATTEMPTING TO
CHANGE TUBES OR CLEAN THE INSIDE OF THE AMPLIFIER
CAUTIONS
• NEVER REMOVE / INSERT AC PLUG WHEN THE UNIT IS ON OR THE AC
POWER SWITCH IS IN THE ON POSITION. OBSTRUCTION OF THE TOP
PORTION OF THE CAD-805RS WILL RESULT IN TUBES OVERHEATING AND
DAMAGE TO THE AMPLIFIER
13
TROUBLESHOOTING GUIDE
SYMPTOM
CAUSE
REMEDY
Hum or “Buzzing” in
speakers
Ground loop
300B tube with high plate
current too high
Intermittent or poor connection
of interconnect
Install 2-pin adapter
on AC cord to float the ground
Check bias of 300B. If high,
readjust to proper bias setting
of 60 mA
Replace bad interconnect cable
“Popping” or “Spitting”
noise
Noisy tube
Check bias of output tubes
If noise is in one channel
through the speaker, swap one
section of tubes at a time until
the noise swaps channels.
Replace the noisy tube.
If high or fluctuating rapidly,
replace output tube
AC fuse blows
Line voltage surge
Replace fuse
Tube fuse blows
Shorted tube (300B &
845 have separate fuses)
Replace tube and tube fuse
14
DIAGRAMS
15
DIAGRAMS
TUBE PLACEMENT
WITH THE POWER OFF: Set the Output Tube Bias control to the 211 or the 845 position.
Install the chosen tube into the chassis. Look at the tube boxes and install the L 6SN7 tube into
the Left socket, the R 6SN7 tube into the Right socket.
Please see next page for 300B tube placement.
16
DIAGRAMS
300B TUBE SOCKET PIN LAYOUT IN CHASSIS
The LARGE pair of 300B tube pins should be installed toward the front of the CAD-805RS
amplifier 300B tube sockets. LOOK CAREFULLY at the tube pins to be sure that you insert them
correctly. It is possible to force the tube pins into the socket the wrong way if you are not
careful! If you install the tube wrong you will probably damage the amplifier and the tube. This
damage will not be covered by the manufacturer’s warranty for a new amplifier. If you have any
doubts about this, have the 300B tube installed by your dealer. If you will look carefully at the
pins and install the large pins to the front of the socket all will be fine! These 300B tube pin
installation instructions are valid for the CAD-805RS only.
Front of the tube socket installed on the CAD-805RS chassis
17
DIAGRAMS
BIAS ADJUSTMENT
The CAD-805RS is equipped with a built-in bias meter on the front of the chassis. The
adjustment pot is located at the back of the chassis along with a bias jack for an external
meter. Check the 300B tube bias current and adjust for a 60 mA reading. The meter is
marked “SET” at the 60 mA mark. Check and readjust to 60 mA again after the CAD-805RS
amplifier is warmed up for 15 minutes.
Note:
• Bias is factory preset to 60 mA. Bias should be reset when installing a new
replacement 300B tube.
18
LIMITED WARRANTY
This warranty has been included with a Cary Audio product that is intended to be sold and used
only within the United States and Canada. Accordingly, this Warranty only applies to Products
which are purchased in the United States or Canada, and only applies while such products are
used in the United States or Canada. Products purchased outside the United States or Canada,
and failures occurring outside the United States or Canada, are not covered by this Warranty.
Cary Audio Warrants to the Original United States and Canada Purchaser for use in
the United States or Canada the Following Cary Audio Products for the Periods
Indicated:
1. Power Amplifiers, Integrated Amplifiers, Surround Sound Processors, and Preamplifiers
have a four (4) year for PLATINUM, two (2) year for GOLD, and one (1) year for SILVER,
parts and labor warranty from the date of the original purchase from Cary Audio.
2. CD or SACD players, DVD players, Music Servers, or Digital Music Centers have an
eighteen (18) month for PLATINUM, twelve (12) month for GOLD, six (6) months for
SILVER parts and labor warranty from the date of the original purchase from Cary Audio.
3. Vacuum tubes, if any are used in the component, are offered a 90-day exchange policy
against defects with the exception of the 300B vacuum tube that has a one (1) year
exchange policy from the date of the original purchase from Cary Audio.
Limitations on Non-Cary Audio Provided Services
Certain Cary Audio Products are designed to employ non-Cary Audio provided services (such as,
by way of example only, Spotify, Tidal, etc.), some of which require separate customer
subscriptions and some of which do not, as part of the Products’ functionality. Because Cary
Audio cannot control the providers of such services or the services themselves, the owner of the
Product therefore assumes all risks related to the use of services provided by anyone other than
Cary Audio itself. Cary Audio cannot and does not warrant against, and shall have no liability of
any kind for any of the following that are attributable to non-Cary Audio providers or services: (1)
interruption, discontinuance, or other unsatisfactory performance of service, (2) reduced Product
functionality that is so attributable, or (3) any other loss or damage of any kind that is so
attributable.
What is Covered and What is Not Covered
Except as specified below, this warranty covers parts and labor to correct all defects in materials
and workmanship. The following are not covered by the warranty:
1. Damage, deterioration, malfunction or failure to meet performance specifications
resulting from:
a. Accident, acts of nature, misuse, abuse, neglect or unauthorized product
modifications
b. Improper installation, removal or maintenance, or failure to follow instructions
supplied with the product.
c. Repair or attempted repair by anyone not authorized by Cary Audio to repair the
product.
d. Any shipment of the product (claims must be presented to the carrier).
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LIMITED WARRANTY
e. Any cause other than a product defect.
2. Cleaning, initial set-up, check-ups with no defects found, or charges incurred for
installation, removal or reinstallation of the product.
3. Any product, on which the serial number has been defaced, modified or removed.
4. Batteries.
5. Accessories, including but not limited to, batteries, cables, mounting hardware and
brackets, cleaning accessories, antenna and detachable power cords.
6. Warranty is void if purchase was made from anyone other than directly from Cary Audio
or an authorized Cary Audio dealer.
Who May Enforce the Warranty?
This warranty extends to products purchased directly from Cary Audio or an authorized Cary
Audio dealer. Purchasers should inquire of the dealer regarding the nature and extent of the
dealer’s warranty, if any.
To obtain such warranty service, the original purchaser must complete and send in the
Warranty Registration Card within 15 days of purchase.
What Will We Pay For?
We will pay for all labor and material expenses for items covered by the warranty. Payment of
shipping charges is discussed in the next section of this warranty.
How Can You Get Service?
In the event that the owner needs to return the unit to Cary Audio for service or repair of a
possible defect, he must follow the following steps:
1. Create a new account or login to our Customer Service Center (www.caryaudio.com) to
obtain a Return Merchandise Authorization (RMA) number. Once the account is set up or
you have logged in, click on “Open New RMA” to begin entering the information to create
an RMA that is needed to return or exchange a product. You will be given an RMA
number, which must appear on the label of the box you ship back.
2. Submit a copy of the original sales receipt. Blank receipts will not validate the limited
warranty for service by Cary Audio. The original sales receipt must contain the following
information:
a. The authorized Cary Audio dealer’s name
b. The date of purchase
c. The unit’s sales price
d. The buyer’s name and address
e. Describe in detail the problem.
f. Note the unit’s model number and serial number.
3. Deliver by either of these methods:
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LIMITED WARRANTY
a. With all freight and insurance charges prepaid and in its original packing
container or equivalent, ship the component to Cary Audio, 6301 Chapel Hill
Road, Raleigh, NC 27607.
b. Hand-deliver the product to Cary Audio (address noted above) or the nearest
authorized service facility.
Limitation of Implied Warranties
All implied warranties, including warranties of merchantability and fitness for particular purpose,
are limited in duration to the length of this warranty.
Exclusion of Damages
Cary Audio’s liability for any defective product is limited to repair or replacement of the product
at Cary Audio’s option. Cary Audio shall not be liable for damage to other products caused by
any defects in Cary Audio products, damages based upon inconvenience or loss of use of the
product or any other damages, whether incidental, consequential, or otherwise.
How State Law Relates to the Warranty
Some states do not allow limitations on how long an implied warranty lasts and/or do not allow
the exclusion or limitation of incidental or consequential damages, so the above limitations or
exclusions may not apply to you.
This warranty gives you specific legal rights, and you may also have other rights which vary
from state to state.
International Purchasers (Export Markets)
Cary Audio warrants its merchandise to purchasers within the United States and Canada
exclusively for use within the United States or Canada. It provides no other warranties,
expressed or implied. If you are living outside of the United States and Canada, please consult
your local dealer or distributor to determine the details of your local warranty.
21
CARY AUDIO
6301 Chapel Hill Road
Raleigh, NC 27607
919.355.0010
caryaudio.com
carydirect.com
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