Mtx Audio Thunderform Users Manual Chevy S 10 Reg Cab (21A7240)

THUNDERFORM S1010

THUNDERFORM to the manual c0fbaf91-b4fd-436b-a8cf-ebe347c32c48

2015-02-02

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Warranty Statement

ThunderForm Loaded Enclosures purchased in the United States from an authorized MTX dealer
are guaranteed against defects in material and workmanship for a period of two years from the date
purchased by the end user, and limited to the original retail purchaser of the product.
Amplified ThunderForm Enclosures purchased in the United States from an authorized MTX dealer
are guaranteed against defects in material and workmanship for a period of one year from the date
purchased by the end user, and limited to the original retail purchaser of the product.
Product found to be defective during that period will be repaired or replaced by MTX at no charge.
This warranty is void if it is determined that unauthorized parties have attempted repairs or alterations of any nature. Warranty does not extend to cosmetics or finish. Before presuming a defect is
present in the product, be certain that all related equipment and wiring is functioning properly. MTX
disclaims any liability for other incurred damages resulting from product defects. Any expenses
incurred in the removal and reinstallation of products are not covered by this warranty. MTX's total
liability will not exceed the purchase price of the product. If a defect is present, your authorized MTX
dealer may be able to effect repairs.
Proof of purchase is required when requesting service, so please retain your sales receipt and take
a moment to register your product online at www.mtx.com.

CHEVY S-10 REG CAB
GMC Sonoma/Isuzu Hombre

Vehicle Specific Subwoofer Enclosure

Made in the USA
One Mitek Plaza, Winslow, IL. 61089
1-800-225-5689 www.mtx.com
21A7240

READ ALL DIRECTIONS CAREFULLY BEFORE BEGINNING
MOUNTING LOCATION: The enclosure mounts behind the driver’s seat
on Chevy S10 Regular Cab Trucks, GMC Sonoma and Isuzu Hombre.
TOOLS REQUIRED FOR INSTALLATION:
Powered Screwdriver
Wire Cutters
Terminal Crimpers

#2 Phillips Head Bit
5/16” Wrench

INSTALLATION: Follow the steps below
1. Place enclosure behind seat, with woofer firing forward (do not mount
yet).
For technical assistance call 1-800-CALL MTX.
These instructions are guidelines only and in no way are intended to replace a
professional installation. As always before screwing or drilling check to make sure
you will not damage any wires or hoses or cause damage to the vehicle.
Warning: Batteries normally produce explosive gases which can cause personal
injury. Therefore, do not allow flames, sparks or lighted substances to come near
the battery. When charging or working near a battery, always shield your face and
protect your eyes. Always provide ventilation.

2. If externally amplified make speaker connections to the enclosure
from the amplifier; loosen terminal knobs (a 13-mm nut driver can be
used). Connect speaker wires from amplifier to enclosure, positive to red
terminal knob and negative to black terminal knob. Refer to Step 25 for
mounting directions.
AMPLIFIED THUNDERFORM

Conventional Wiring of Aftermarket Radio
20 Amp Fuse

+

_

Routing Power Wire; we recommend a connection directly to the
battery.
3. Remove driver side threshold trim; pull up on trim, it will remove easily.

Low Level Signal
Optional EBC
(Electronic Bass Control)
GAIN
GAI

STATUS

LEFT

X-OVER

REM

RIGHT

INPUT

Turn On Lead

4. Using furnished wiring harness route 10ga red power wire starting at
pre-amp location. Route wire on driver's side, over to threshold and under
1

6

21. When amp turns on, LED will display red during diagnostic mode,
and then green, signaling amp is on and functioning. Amp will only turn
on when radio is on.
22. Adjust gain and crossover.
Setting Gain
Turn gain knob on Thunderform pre-amp to minimum, counter clockwise. Play a favorite tape or compact disc that contains consistent music
and bass. Turn the source unit to maximum listening level. You should
know that some source units will produce distortion or “clip” before the
unit reaches maximum volume. Reduce volume to the loudest listening
level before distortion. Turn the gain knob on the Thunderform pre-amp
clockwise until the speaker starts to distort and reduce gain to loudest
listening level before distortion.

carpet to the front of vehicle.
5. Open hood.
6. Drill a hole through the fire wall. Locate a spot low on the fire wall on
the driver’s side. You should always look to find a clear path. Drill a hole
from inside of the vehicle into engine compartment and insert grommet.
Firewall

Drill Hole
for Grommet

Battery

Optional- The EBC, or Electronic Bass Control, allows a remote bass
control to be adjusted from the driver's seat.
Setting Crossover
You should set the crossover to your own personal listening taste. The
crossover is adjustable to any frequency between 50Hz (counterclockwise) to 150Hz (clockwise). As a guideline, the goal is to create the illusion of bass up front. The higher the crossover point the more “audibly
visible” your sub is going to be. Take your time and really listen to your
system, grab a soda and a few of your favorite tunes and have fun.
TROUBLESHOOTING TIPS IF AMP DOES NOT TURN ON
Check
Check
Check
Check

all connections at battery and that fuse is installed
speaker wire connections
ground
fuse on pre-amp

23. Reinstall radio by reversing the removal instructions.
24. Reinstall threshold trim. Locate and align holes in vehicle with pins
on trim; and snap back into place.

Note: To avoid any damage to parts inside engine compartment,
drill from inside of vehicle using a short bit.
7. Route 10ga red power wire through grommet into the engine compartment.
8. Route 10ga red power wire through engine compartment safely away
from any moving or hot parts that could damage the wire.
9. Cut 10ga red power wire to length, connect the supplied fuse holder
from the wire kit to the end of the wire.
10. Remove 20amp fuse from MTX fuse holder. Connect furnished ring
terminal to positive side of battery. Remove 5/16" bolt from factory battery
terminal. Pass bolt through factory battery terminal, then ring terminal,
and into the other side of factory battery terminal and retighten bolt.
Ignition OFF When Disconnecting Battery
Always turn the ignition OFF when connecting or disconnecting battery
cables. Failing to do so may damage the Power train Control Module
(PCM) or other electronic components.

25. Using screws provided, install the enclosure into vehicle as shown
below.
5

2

11. Ground amplifier to chassis of vehicle; connect the terminal provided
to the 10ga black wire from furnished wiring harness. A good ground is
as important as the power connection. The ground should be as short as
possible and the contact point should be free of paint and debris.
SPEAKER WIRES
12. The best place to find speaker wires is behind the radio.
13. Remove (4) 7mm bolts from trim underneath steering column.

17. Behind the radio, locate the rear speaker wires. Colors are right
channel; dark blue (positive) light blue (negative), and left channel; brown
(positive), yellow (negative). Tap into wires with the supplied RCA High
Level input wires and route over to driver’s side threshold and to pre-amp
of enclosure
Although, MTX has made every effort to assure proper wiring colors,
MTX is not responsible for any changes made by the vehicle manufacturer which sometime occur. If wiring colors do not match then physical
verification is required.
CONNECTION TO ENCLOSURE
18. Connect speaker wire RCA's to the inputs of pre-amp.
Note: Patented BTL turn on circuitry- amplifier senses DC offset provided by “high
powered” or BTL type head units. This feature turns the amplifier on automatically
if you are using high level inputs.
20 Amp Fuse

_

+

Optional EBC
(Electronic Bass Control)

SOLID
GAIN
GAI

STATUS

RIGHT

PWR

LEFT

X-OVER

EBC

GND
REM

Light Blue (-)
STRIPED

15. Unplug lights and air bag cut off switch on the backside of the trim
panel.

Yellow (-)
Brown
wn (+)

SOLID

19. Plug power wire harness into amplifier pre-amp.

STATUS

RIGHT
LEFT

EBC

GND
REM

20A

GAIN

INPUT

PWR

16. Remove (2) bolts holding the radio in the dash.

Dark Blue (+)

INPUT

X-OVER

14. Remove (3) bolts holding the instrument cluster trim panel. Pull along
edge to unsnap.

20. Replace 20amp fuse under hood.
3

4



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