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.
In the channel on driver's and passenger's side threshold locate
the rear speaker wires. Colors are driver's side, yellow/blue (positive),
tan/yellow (negative), and passenger's side, orange/yellow (positive),
brown/purple (negative). Tap into wires with supplied RCA High Level
input wires and route under carpet to the rear seat, over to pre-amp on
enclosure.
Although, MTX has made every effort to assure proper wiring colors,
MTX is not responsible for any changes made by the vehicle manufac-
turer which sometime occur. If wiring colors do not match then physical
verification is required.
CONNECTION TO ENCLOSURE
13.
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
PW
R
GN
D
RE
M
EB
C
INPUT
RI
GH
T
LE
FT
GA
IN
X-
OV
ER
ST
AT
US
GA
I
STRIPED
SOLID
SOLID
Yellow/Blue (+)
Tan/Y
T
T
ello
an/Y
an/Y
w (-)
Brown/Purple (-)
Orange/Y
Orange/Yell
Orange/Y
Orange/Y ow (+)
(+)
Optional EBC
(Electronic Bass Control)
14.
Plug power harness into amplifier pre-amp.
20
A
PW
R
G
N
D
RE
M
EB
C
INPUT
RI
G
H
T
LE
FT
G
AI
N
X-
O
VE
R
ST
AT
U
S
15.
Replace 20amp fuse under hood.
16.
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.
17.
Adjust gain and crossover.
Setting Gain
Turn gain knob on Thunderform pre-amp to minimum, counter clock-
wise. 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.
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 (counterclock-
wise) to 150Hz (clockwise). As a guideline, the goal is to create the illu-
sion 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 all connections at battery and that fuse is installed
Check speaker wire connections
Check ground
Check fuse on pre-amp
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