Ignition OFF When Disconnecting Battery
Always turn the ignition OFF when connecting or disconnecting battery cables.
Failing to do so may damage electronic components.
13.
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.
Factory Speaker Wire Colors
14.
In the channel on drivers' side threshold, locate the left rear speaker wires
twisted together and wrapped in black tape. Wire colors for the left rear speak-
ers are: White/Purple (positive) and Grey/White (negative). In the channel on the
passengers' side threshold, locate the right rear speaker wires. The right rear
speaker wire colors are: White/Blue (positive) and Brown/Blue (negative). Tap into
wires with the supplied RCA High Level input wires and route over to passenger
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 the physical verification is required.
CONNECTION TO ENCLOSURE
15.
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
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
STRIPED
SOLID
SOLID
White/Blue (+)
Brown/Blue (-)
Grey/White (-)
White/Purple (+)
Optional EBC
(Electronic Bass Control)
16.
Plug power wire 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
17.
Replace 20amp fuse under hood.
18.
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.
19.
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 may want to turn down the
bass slightly on the source unit. 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 drivers' seat.
Setting Crossover
You should set the crossover to your own personal listening taste. The cross-
over 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 all connections at battery and that fuse is installed
Check speaker wire connections
Check ground
Check fuse on pre-amp
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