Carvin Dcm4000 New Owners Manual DCM4000_01_01.qx

2014-07-19

: Carvin Carvin-Dcm4000-New-Owners-Manual carvin-dcm4000-new-owners-manual carvin pdf

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This symbol is intended to alert the
user to the presence of uninsulated
“dangerous voltage” within the product’s enclosure that may be of sufficient magnitude to constitute a risk of
electric shock to persons.

This symbol is intended to alert the
user to the presence of important
operating and maintenance (servicing) instructions in the literature
accompanying the appliance.

IMPORTANT! FOR YOUR PROTECTION, PLEASE READ THE FOLLOWING:
WATER AND MOISTURE: Appliance should not be used near water (near a bathtub, washbowl,
kitchen sink, laundry tub, in a wet basement, or near a swimming pool, etc). Care should be taken
so that objects do not fall and liquids are not spilled into the enclosure through openings.
POWER SOURCES: The product should be connected to a power supply only of the type described
in the operating instructions or as marked on the appliance.
GROUNDING OR POLARIZATION: Precautions should be taken so that the grounding or polarization is not defeated.
POWER CORD PROTECTION: Power supply cords should be routed so that they are not likely
to be walked on or pinched by items placed upon or against them, paying particular attention
to cords at plugs, convenience receptacles, and the point where they exit from the appliance.
SERVICING: The user should not attempt to service the appliance beyond that described in the
operating instructions. All other servicing should be referred to qualified service personnel.
FUSING: If your unit is equipped with a fuse receptacle, replace only with the same type fuse.
Refer to replacement text on the unit for correct fuse type.

The conductors in the AC power cord are colored in accordance with the following code.

BLUE—Neutral

Your Carvin amplifier is guaranteed against failure for 3 YEARS unless otherwise stated.
Carvin will service and supply all parts at no charge to the customer providing the unit
is under warranty. Shipping costs are the responsibility of the customer. CARVIN DOES
NOT PAY FOR PARTS OR SERVICING OTHER THAN OUR OWN. A COPY OF THE ORIGINAL INVOICE IS REQUIRED TO VERIFY YOUR WARRANTY. Carvin assumes no responsibility for horn drivers or speakers damaged by this unit. This warranty does not cover,
and no liability is assumed, for damage due to: natural disasters, accidents, abuse, loss
of parts, lack of reasonable care, incorrect use, or failure to follow instructions. This warranty is in lieu of all other warranties, expressed or implied. No representative or person
is authorized to represent or assume for Carvin any liability in connection with the sale
or servicing of Carvin products. CARVIN SHALL NOT BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES.
When RETURNING merchandise to the factory, you may call for a return authorization number. Describe in writing each problem. If your unit is out of warranty, you
will be charged the current FLAT RATE for parts and labor to bring your unit up to factory specifications.
register online at www.carvin.com/registration.

MAINTAINING YOUR EQUIPMENT

SAFETY INSTRUCTIONS (EUROPEAN)
GREEN & YELLOW—Earth

LIMITED WARRANTY

BROWN—Live

U.K. MAIN PLUG WARNING: A molded main plug that has been cut off from the cord is
unsafe. NEVER UNDER ANY CIRCUMSTANCES SHOULD YOU INSERT A DAMAGED
OR CUT MAIN PLUG INTO A POWER SOCKET.

Avoid spilling liquids or allowing any other foreign matter inside the unit. The panel of
your unit can be wiped from time to time with a dry or slightly damp cloth in order to
remove dust and bring back the new look. As with all pro gear, avoid prolonged use in
caustic environments (salt air). When used in such an environment, be sure the amplifier is adequately protected by rack, covers, etc..
REFER SERVICING TO QUALIFIED SERVICE
PERSONNEL! THIS UNIT CONTAINS HIGH
VOLTAGE INSIDE!

REPLACEMENT PARTS LIST FOR DCM4000 AMP
49-56152

560PF SMT 5% CERAMIC 0805

58-56025

560.5 SMT .25W 1206 1% R24

“C149,C150,C249,C250”

58-68035

6.8K SMT .25W 1206 1% “R14,R104,R204”

82PF SMT 5% CERAMIC 0805 “C144,C244”

58-91025

910.5 SMT .25W 1206 1% R22

RES 1.00KOHM .25W 5% CARBON

60-00014

TRANS MPSA14 DRLNGTN NPN T0-92 Q2

“R7,R142”

60-15032

TRANS MJE15032 NPN T0-220 “Q112,Q212 (SECONDARY)”

RES 10.00KOHM .25W 5% CARBON

60-15033

TRANS MJE15033 PNP T0-220 “Q113,Q213 (SECONDARY)”

R140

60-21193-1*

TRNS BIPOLAR MJL21193-PREPPED

03-00220

“INSLTR MICA .0030””.450””X .65”””

03-00503

“INSULATOR .36X .36X .20”” 85deg”

03-92521

STANDOFF LED .925 x .215 T1

49-82052

06-10028

MS PPH 4-40X .500 ZINC TYPE F

50-10035

06-40050

TERMINAL VERT MALE PC MTG .250

06-40060

TERMINAL 90dg MALE PC MTG .250

07-01602

“KNOB “”6”” 6x6x9.7mm GREY CAP”

07-01603

“KNOB “”6L”” 6x6x17.4mm GREY CAP”

52-10015-1

RES 10.00 OHM .50W 5% CARBON R6

12-40000

“HEATSINK 12”” LENGTH ALUMINUM”

53-22025-1*

RES 220.00 OHM 1.00W 5% CBN .3

12-57462

HEATSINK VERT W/TABS T0-220

15-00105

COIL AIR 1.5uH 14AWG “L100,L200”

54-02206

RES .22 OHM 3.00W 5% BOX

21-40000

XLR FEML CON NEUTRIK #NC3FAV-0

“R172,R173,R174,R175,R176,R177,R178,

“J100,J200”

R179,R180,181,R182,R183,R272,R273,R274,
R275,R276,R277,R278,R279,R280,R281,R282,R283”

50-10045

“QC1,QC2,QC3”

50-22045

“QC4,QC5,QC6,QC7,QC8”

1
2

RES 22.00KOHM .25W 5% CARBON

“Q114,Q115,Q116,Q117,Q118,Q119,Q214,Q215,

“R8,R141”

Q216,Q217,Q218,Q219”
60-21194-1*

XLR MALE CONNECTOR “J101,J201”

21-45000

TWIST-LOK 4-POLE PCMTG #NL4MD-V

54-10015-2

“J1,J102,J202”
23-03529

FUSEHOLDER CLIPS 3AG VERT MTG F1

55-15003-1

23-08604

“CONNECT HEADER .086”” 4 PIN” “H2,H7A,H7B

55-05025

“SECONDARY BR100,BR200”
60-50200

“D130,D131,D230,D231”
2

OPTO ISOLATOR VACTROL AXIAL “OP100,OP200”

60-54000-1*

TRANS 2N5400 AMP PNP T0-92

1.5k 5w WIRE LEAD RESISTOR “R3,R4”

60-55500-2*

TRANS 2N5550 HV NPN 250V T0-92

60-75320

LED RED DIFFUSED 3MM T-1.00

60-75330

LED GREEN DIFFUSED 3MM T-1.00

RES 5.00 OHM 5W 5% SB VERT

“CONNECT HEADER .086”” 5 PIN” H3

56-35010

RES 350.00 OHM 10W 10% SB SDOF R5

“CONNECT HEADER .100”” 2 PIN” “H4,H9,H10”

58-10025

100.5 SMT .25W 1206 1%

23-11002

CONNECT HEADER 2 PIN STRAIGHT

“Q101,Q102”

“D110,D112,D210,D212”

1K SMT .25W 1206 1%

60-75340

“R11,R115,R157,R215,R257,R30”

“D1,D6,D19”

LED YELLOW DIFFUSED 3MM T-1.00

23-11004

CONNECT HEADER 4 PIN STRAIGHT

10K SMT .25W 1206 1%

60-78150-1*

REG VOLT 15+V 1A (PREPPED) VR1

23-11010

CONNECT HEADER 10 PIN STRAIGHT

“R12,R13,R17,R28,R31,R100,R101,R102,R103,

60-79150-1*

REG VOLT 15-V 1A (PREPPED) “VR2, VR3

“H1A,H1B,H3A,H3B,H4A,H4B”

R120,R121,R127,R128,R150,R152,R153,R167,

SWITCH DPDT PUSH PC MTG LOCKNG

R185,R187,R200,R201,R202R,203,R220,R221,

61-04733

“S1,S2,S4,S5”

R227,R228,R250, R251,R252,R253,R267,R285,R287”

61-40030

58-10045

“H2A,H2B,H5A,H5B”

25-02201

“R18,R129,R159,R188,R190,R229,R259,R288,R29”

62-00014

MMBTA14 SOT-23 SMT “Q100,Q200”

1M SMT .25W 1206 1% “R114,R214”

62-19140

1N914 HI SPD SMT 250mW DIODE

“CAP ELEC 10,000 MFD 100V 20%” “C12,C13,C14,C15”

58-15025

150ohm SMT .50W 1206 1% “R164,R264”

“D2,D20,D21,D22,D23,D100,D132,D133,D200,

“JUMPER PCB 20AWG .350”” X .175”””

58-15045

15K SMT .25W 1206 1%

D232,D233,D18,D4,D7,D8,D9”

58-15055

150K SMT .25W 1206 1% “R9,R27,R209”

CAP POLY .0470UF 100V 10% PREP

58-18035

1.8K SMT .25W 1206 1% R131

62-29010

NJM2901SMT SNGLE SUPPLY A111

“C6,C7,C8”

58-22035

2.2K SMT .25W 1206 1%

62-45650

NJM4565 SMT DUAL HI FREQ “A10,A11”

“R2,R32,R110,R111,R132,R193,R210,R211,R232,R293”

62-54001

MMBT5401LTI PNP SOT-23 SMT “Q126,Q226,Q3”

22K SMT .25W 1206 1%

62-55500

MMBT5550 NPN SOT-23

70-05713

RELAY SPDT 12A@120VAC/24V COIL

30-04008B

PCB CARD MAIN DCM4000

41-47322-1

CAP MYLR .0470UF 250VAC BOX

42-10312

44-13520

46-10412-1

46-47312-1*

“C1,C2,C3”

“R25,R122,R123,R184,R186,R222,R223,R284,R28”

“B1,B2,B3,B4”
CAP POLY .1000UF 100V 10%

“C130,C230”

47-10235-1

“CAP ELEC 1,000 MFD 35V 20%” “C5,C9,C10,C11”

47-47125-1*

CAP ELEC 470 MFD 25VOLT 20% C24

47-47151-1*

CAP ELEC 470 MFD 50 VOLT 20% C4

49-10212

0.001UF SMT 10% FILM 0805 50V “C147,C247”

49-10451

0.1 uF SMT 10% FILM 1206 50V

49-22035

“C20,C22,C103,C203”

“A100,A101,A110,A120,A200,A201,A210,A220”

“R107,R109,R154,R158,R207,R254,R258”
220K SMT .25W 1206 1%

“Q1,Q10,Q110,Q127,Q210,Q227,Q5”

“R15,R156,R191,R192,R256,R291,R292”
58-27025

NJM2043SMT(TESTED) DUAL HFREQ

“K100,K200”

270.5 SMT .25W 1206 1%

70-05715

“R106,R162,R165,R206,R262,R265”

70-22125

FUSE X2: 25Amp 250V Slow Blow MBA

RELAY SPDT 15A@120VAC/24V COIL K1

3.3K SMT .25W 1206 1% “R161,R261”

71-09253

“POT 9 “”D-P”” 25F B50K-”

“P100,P200”

C22,C242,C246,C248,C16,C17”

58-33045*

33K SMT .25W 1206 1% R21

71-24450

POT VERT TRIMMER 500ohm

“P110,P210”

58-36055

365K SMT .25W 1206 1%

“C100,C101,C104,C105,C106,C120,C121,C123,

58-47025

C11,C200,C201,C204,C205,C206,C220,C221,C223,C21”

58-47035

27 PF SMT 5% CERAMIC 0805

“R105,R113,R205,R213”

58-47045

4.7K SMT .25W 1206 1%
47K SMT .25W 1206 1%
“R10,R108,R124,R125,R155,R160,R208,R224,

39PF SMT 5% CERAMIC 0805 “C143,C243”

R225,R255,R260”

0.047UF SMT 10% FILM 0805 50V
“C107,C145,C207,C245”

470.5 SMT .25W 1206 1% R16
“R1,R19,R20,R29,R166,R266”

0.033UF SMT 10% FILM 0805 50V
“C151,C152,C251,C252”

49-27052

49-47312

58-22055

62-20430

58-33035

0.0022UF SMT 10% FILM 0805 50V C21

58-47055

470K SMT .25W 1206 1% “R23,R26,R130”

DCM4000
The DCM4000 was designed for pro sound companies and individuals who require
huge amounts of clean RMS power to drive large, professional speaker systems
and arrays, as well as high powered monitor systems. This was the main idea and
motivation behind the concept of the DCM4000: Twice the power - same number
of rack spaces. Another advantage of the DCM4000 was even more obvious 1400 Watts x 2 at 8 ohms in bridge mode!

INSPECT YOUR SPEAKER FOR ANY DAMAGE which may have occurred during shipping.
If any damage is found, please notify the shipping company & CARVIN.
SAVE THE CARTON & ALL PACKING MATERIALS. In the event you have to re-ship your
unit, always use the original carton and packing material. This will provide the best possible protection during shipment. CARVIN and the shipping company are not liable for any
damage caused by improper packing.
SAVE YOUR INVOICE. It will be required for warranty service if needed in the future.
SHIPMENT SHORTAGE. If you find items missing, they may have been shipped separately.
Please allow several days for the rest of your order to arrive before inquiring.
RECORD THE SERIAL NUMBER on the enclosed warranty card or below on this manual
for your records. Keep your portion of the card and return the portion with your name and
comments to us. Or you may register online at www.carvin.com/registration

A TON OF POWER X 4
Each DCM4000 incorporates four separate 1000 Watt RMS amps and is powered by redundant toroid power supplies that are totally independent of each other.
It’s like having two complete 2000 watt amps in one 3 space package. The only
thing they share is the AC cord so if one of the two primary fuses fails, the other
amps are not affected. These four amps can be used to power four separate speakers from four different sources (this is ideal for monitor systems). Each side can
be bridged to become two 2000 Watt amps (great for high powered speakers and
subwoofers like the Carvin TCS series). Each side can even be paralleled and then
chained together to be fed by a single input source (perfect for arrays with a large
number speakers).

AWESOME SOUND!
What good is a ton of power if it doesn’t sound great? The Carvin DCM4000
is an incredibly transparent amp sporting slew rates well over 50 VmS. With massive dual power supplies and huge reserve capacitors for on-demand power, the
DCM4000 delivers pure, uncolored sound at full output; with tight, punchy lows
and open, transparent highs – without a hint of distortion.

These pro amplifiers are completely protected from any kind of abuse that might
pop up in a typical road rig – thermal, over-current, short-circuit, voltage spikes,
“hot-swapping” speakers – the DCM4000 is designed to protect itself and be right
back up and running as soon as the problem is remedied. The all-steel, front &
rear rack-able chassis can take whatever abuse is thrown at it. These amplifiers
are just what the real pro wants - “rack’em and forget’em”.

“D10,D11,D12,D13,D14,D15,D16,D17,D120”

“C23,C102,C122,C124,C142,C146,C148,C202,
1

49-39052

58-22045

SMT CAP 22uF 35v ELECTROLITIC

49-22212

DIODE RECT GEN 1N4003 200V 1A

58-10065

SWITCH 4PDT PUSH PC MTG LOCKNG S3

100K SMT .25W 1206 1%

DIODE ZENER 1N4733A 5.1V 1W Z100

49-33312

(WITH HEATSINK)”

58-10055

25-04201

RECEIVING INSPECTION

RUGGED TO THE EXTREME

“D3,D5,D111,D113,D211,D213”

OPERATING MANUAL

hook-up mistakes. On the back panel you get a male and female XLR input per
amp (perfect for daisy-chaining amps). The DCM4000 features a speaker output
section with professional high current Twist-Lok and Banana/Binding Post connectors to mate with any pro speaker rig. Each dual-amp side features switches
for Bridging, Parallel input, Ground Lift, Limiter, and Sub-sonic filter.

“Q111,Q211(SECONDARY, PLACE THROUGH HOLE)”

“R112,R126,R163,R212,R226,R263”
6

DIODE GEN REC 1N5402 3A 200V

60-50253

23-10002

58-10035

RECTIFIER BRIDGE 35AMP/400V PC

“R169,R170,R269,R270”

23-08605

“H5,H8A,H8B”

Q221,Q222,Q223,Q224,Q225”
60-35041

RES 10.00 OHM 2.00W 5% CARBON

“R143,R144,R243,R244”

(SECONDARY)”

DCM4000 POWER AMP

“Q120,Q121,Q122,Q123,Q124,Q125,Q220,

“R168,R171,R268,R271”

21-40001

TRNS BIPOLAR MJL21194-PREPPED

CARVIN ENGINEERING DATA

COOLEST COOLING
Carvin’s exclusive “Wind-Tunnel” heat-sink with dual “push/pull” 105 CFM fans,
ensures full, uninterrupted RMS power delivery without over-heating concerns. These
are continuous-duty amps meaning that if you drive them at full power, 24 hours
a day, they won’t shut down. And, be assured that you’ll get your full power in
RMS watts, not pulse or peak power.

DISTORTION-FREE LIMITERS
The purpose of a limiter is to hold down peaks so the amp won’t distort even with
extra hot input signals (this protects your expensive speakers). In addition, a well
designed limiter can increase your amp’s average output as much as 3 db. Part
of Carvin’s design uses the more expensive, distortion-free linear “opto isolators”.
Unlike amps that use FET controlled limiters which can inject small amounts of
distortion, the DCM Series limiters keep your sound pure and uncolored!

FRONT & REAR PANELS
Along with the normal Gain controls and Signal, Clip, and Power indicators, we’ve
included a very useful “Bridge Mode” indicator to avoid inconvenient or even costly
76-04008A 1002

DCM POWER AMP SPECIFICATIONS:
MODEL DCM4000

Bridged RMS Continuous
4Ω, (1k Hz, <1.0%)
2000w x 2
8Ω, (1k Hz, <1.0%)
1400w x 2
All Channels RMS Continuous
2Ω (1k Hz, <1.0%)
4Ω (1k Hz, <1.0%)
8Ω (1k Hz, <1.0%)

1000w x 4
700w x 4
425w x 4

THD (Typical—1/2 power):
Damping Factor:
Slew Rate: bridged mode
Sensitivity:
Signal to Noise Ratio:
Frequency Response:
Input Impedance:

0.03%
>500
50v/µs
(4Ω, Vms) 1.0 V
Above 100dB
±0.5 dB, 20 Hz to 20kHz (±1.5 dB, 10 Hz & 40 kHz)
20K Ω, balanced

Protection Circuits: • Short Circuit • No Load Protection • SpeakerGuard™
• Thermal Shut-Off • Mute On/Off
Controls and Indicators
Front: • Power switch • Recessed attenuators • Signal LED • Clip LED • Protect LED
• Power ON Indicator • Bridge Indicator
Rear: Ground Lift (each channel) • Parallel Input Switch • Speaker Output Bridge
Switch • Limiters IN/OUT Switch • Lo cut Switch • Input Connectors: Four each;
Balanced Male and Female XLR • Speaker Output Connectors: Dual heavy-dubinding posts, six Twist-Lok (two bridgeed).
Dimensions: 5 1/4" High x 19" Wide x 16" Depth (3-space)
Net Weight: 70 lbs.
Power : TWO 120 VAC 15 amp circuit minimum. (20 amp recommended)
TWO 240 VAC 10 amp circuit minimum. (15 amp recommended).
(Note: You may plug both cords into a dedicated 20 amp circuit when using reduced loads. You may
use 8Ω loads at moderate levels. However, 2Ω, 4Ω or bridged loads at higher levels will cause a single
20 amp circuit breaker to trip.)

For your records, you may wish to record the following information.
Serial No._____________________ Invoice Date________________________

c
12340 World Trade Drive, San Diego, CA 92128
800.854.2235 www.carvin.com

FRONT & REAR PANEL CONTROLS
TYPICAL BRIDGE STEREO SETUP

TYPICAL STEREO BIAMP SETUP WITH 2 DCM4000
Left Highs

PROTECT

11 10 9

4000 Watt Power Amp

11 10 9

8
12
12
8
12
7 ON 13
13
7
ON 13
6
6
15
15
15
5 17
5 17
5 17
4 19
4 19
4 19
PROTECT
PROTECT
3 22
22
3 22
3 22
2
2 11 30
10 9
30
2
30
30 11 10 9
11 10 9
11 10 9
8
12
8
12
8
8
1 12
1 13 12 50
50
50
7 1 ON 13 50
13
7 ON 13
7
7
0 dB
0 dB
0 dB15
6
6
15
6
6
15
15

13
15
17
19

22
30
50

∞

17
19

CH1

17
5 BRIDGE
CLIP 4
19
SIGNAL
3 22
2

∞

1
0 dB

30
50

BRIDGE

∞

5 17
CLIP
4 19
SIGNAL
3 22

CH2

1
0 dB

30
50

5 17 BRIDGE
CLIP
4 19
3SIGNAL
22

CH3
2

∞

1
0 dB

30
50

BRIDGE

Right Highs

DCM4000

PROTECT

∞

6
5
4
3
2
1
0 dB
5

CH434

4Ω

CLIP

4Ω

BRIDGE switch must be ON (in)

SIGNAL

∞

1
0 dB

CLIP

SIGNAL

Ch 1
PARALLEL switch
must be ON (in)

Right Lows

WARNING

This product produces high
sound pressure levels that
could damage your hearing.
Use with caution.

Left lows

Ch 3
BRIDGE switch
must be ON (in)

XC3000 CROSSOVER

4Ω

2000W

2000W
“Bridged”

4Ω

2000W

FULL LOAD SETUP

MULTI AMP INPUT SETUP WITH ONE INPUT SIGNAL
1st amp

PARALLEL switch
must be ON (in)

FRONT PANEL

10 17 12

11 16

A sturdy one piece 12 guage steel face plate accomodates easy transporting along
with facilitating rack installation. The rack mounting holes are designed on ISO standard spacing. Four
10-32 x .5” phillip machine screws are normally used to secure the amp. The rear support brackets must
also be used, which are adjustable from a depth of 13” to 19”.

11. SPEAKER OUTPUT CONNECTORS

2. POWER SWITCH Check the power amp connections and verify the AC line power source before
engaging the POWER switch. The yellow LED unmistakably indicates that all circuits are properly powered up. Yellow is used so the operator can see the red indicators (clipping or protect) from a distance.

12. PARALLEL INPUTS The rear parallel switch for inputs 1 and 2 allows you to feed a single
input signal into input 1 and have it also drive input 2 without a "Y" cable (this also applies to inputs 3
and 4 respectively). Push in the parallel switch and plug your input cable into INPUT 1. Channels 1 and
2 will now have the same input signal. Each side of the amp (1 & 2 or 3 & 4) can be set up independently. You can parallel 3 and 4 while leaving 1 and 2 unparalleled and so on. In order to parallel the
entire amp, push in both parallel buttons and plug a short XLR cable from channel 2 into channel 3. This
will provide the entire amp with the same input signal.

1. MOUNTING

3. CHANNEL LEVEL CONTROL Precision input LEVEL attenuators are used to adjust the volume
levels. To deliver the amps maximum power without reducing the headroom of the signal source, the level
controls should be turned full on.
4. CHANNEL SIGNAL INDICATOR The green SIGNAL LED indicators will start to flash when
there is a signal passing to your speakers (-30dBu).
5. CHANNEL CLIP INDICATOR The red CLIP LED indicators will start to flash when each channel has reached its maximum output. Occasional flashing caused by lower bass frequencies is OK. However,
consistent flashing caused from higher frequencies may damage high frequency drivers (excessive distortion). This does not cause damage to the amp.
6. BRIDGE MODE INDICATOR

This yellow LED will indicate when the rear “bridged” switch
has been engaged and you’re running a pair af channels in the “bridge” mode.

7. POWER INDICATOR/FUSES This Yellow LED will indicate power to each pair of amps. If
one pair does not come on, remove the top lid and replace both 25 AMP 250 Volt slow blow MBA fuses
located in the center bottom of the amp.
8. FRONT COOLING VENTS/FAN

Upon rack installation, the rear of the amp must be fully
exposed to room temperature air. The surrounding air should not be warmer than 120° or the thermal
protection will engage. The front cooling vents are not to be restricted from exhausting the warm air.

9. PROTECT LED INDICATOR

The red PROTECT LED provides the operator with information
about the status of the amplifier. The PROTECT LED can come on under 3 different conditions (when
this happens both channels are muted)
1) During power-up, the amplifier stays in a muted state for approx. 3 sec until it determines that
everything is functioning normally (no output shorts or over temp conditions).
2) When the output load draws excessive current or a direct short is detected in a speaker cable or
speaker system, reset this condition by turning the amp off for two seconds and then on again.
Check for shorted cables and proper impedance (2 ohms minimum per ch or 4 ohms BRIDGED).
3) Overheating is usually determined when the amp stops in the middle of a performance and the
PROTECT LED comes on. If this is the case, leave the amp on for the fan to cool the amp down.
The amp will automatically reset within 1 to 3 minutes. The PROTECT LED will turn off when
ready. Check for the following conditions; a) The rear intake air is restricted, b) The intake air is
extremely warm, c) The front exhaust vents are restricted, or d) Excessive speaker load (try other
speakers or remove speakers if you are lower than the recommended minimum impedancel).

REAR PANEL

10. XLR CHANNEL INPUTS

Balanced XLR inputs are featured on each channel. Each channel also features an XLR "through" connector for daisy chaining your input signals to other channels or
amps. XLR pin configuration. Pin 1: Grounded through the GROUND LIFT switch, Pin 2: positive Bal.
signal and Pin 3: negative Bal. signal.

Each channel has a high current Twist-Lok speaker
connector. A 12 gauge cable is recommended such as Carvin's SP series cables. Channel pairs 1 and 2,
3 and 4 also have a bridged Twist-Lok connector for bridging the four 1000 watt channels into a pair of
2000 watt outputs. (see 17 BRIDGE MODE.)

2Ω
2Ω

1000W

Ch 1

XLR
cable
2nd amp

13. INPUT GROUND LIFT

Many times sound systems are connected in such a manner to
cause a grounded loop with the inputs that result in audible hum. The input GND LIFT switches on the
rear panel will help eliminate this problem. If not, another way to eliminate ground loops is to install a
“line matching” transformer between the amplifier input and the signal source and then cut the wires
to PIN 1 and ground terminals.

14. LIMITERS

To activate the LIMITERS, engage the rear limiter switches. The built-in high quality
limiters are recommended to hold down peaks that could cause early distortion. Limiters will help to raise
the average power so that you can get more output. To check the effectiveness of the limiters when the
channel starts to distort (under the amps full output), engage the limiters and hear the reduction of the distortion. If the distortion stops, you can turn the channel up for more power. The lower bass frequencies
are most affected. WARNING: Do not check in an environment where the sound level could damage your ears!

2Ω

1000W

(Shielded)

BALANCED MIC/LINE XLR CABLES
3

SHIELD
-NEG.

15. LO CUT

When this mode is engaged it cuts -6dB per/octave @ 30Hz. This helps to eliminate
pops and bumps on vocal mics and stage rumble.

+POS.
SHIELD

16. SPEAKER OUTPUT BINDING POSTS

Wire sizes up to 7 gauge (50 amps) can be inserted
into the binding post “side holes”. Large cables can be used with “banana” plugs which plug into the end of
the binding posts (remove colored caps). Binding posts are spaced on ISO standards. Use the two center RED
binding posts for BRIDGE speaker connections (see 17 BRIDGE MODE).

2
+POS.
-NEG.

17. BRIDGE MODE—25V/70V DISTRIBUTION SYSTEMS

The “DCM” Series can be operated in
bridge mode if you require a 25V/70V distribution speaker system or high powered at high output impedances. With your amp off, push in the rear (recessed) BRIDGE switch after you have made your speaker connections. The INPUT and LEVEL is handled by channel 1 and 3. The minimum speaker impedance is 4 ohms.
CAUTION: The power developed by bridging your amp can destroy most speaker systems!

18. AC POWER The DCM4000 requires two 15 - 20 amp AC sockets for the dual toroid power supplies. It is designed to run on either 120V 60Hz or 240V 50Hz depending on the model purchased. For
loads less than 8 ohms the AC cords must be pluged into two separate 15 amp “minimum” outlets. Never
defeat the grounded connection or electrocution may result!
19. FAN INTAKE

Upon rack installation, the rear of the amp must be fully exposed to room temperature air. The surrounding air should not be warmer than 120° or the thermal protection could activate. The front cooling vents are not to be restricted from exhausting the warm air.

3
GND

+ SIGNAL (BAL.)

2
3

- SIGNAL (BAL.)

HELPFUL HINTS
1. No sound from Ch 2 or 4:
The rear BRIDGE switch has been inadvertently pushed in.

If the hum is not eliminated, then use a 600Ω line input transformer cutting the input
ground on the connectors (Pin 1). This isolates the input ground from the AC power ground.

2. Stereo channels sound the same:

5. Poor sound (poor bass):

The rear PARALLEL switch has been inadvertently pushed in.

3. No High Frequencies:
Tweeters or midrange drivers have been damaged or blown from
feedback or overpowering.

4. System hum:
Try switching the GND LIFT switch IN or OUT (depending on your use).

The speaker systems are wired out of phase to each other. To correct, reverse the wires
on one speaker connector only and your bass response should improve.

6. Main AC breaker trips:
Each 120VAC DCM4000 amp will require two separate 20 amp circuit (240V: 25 amp)
to deliver its full sine wave power with a bench load.

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Carvin Dcm4000 New Owners Manual DCM4000_01_01.qx

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