MTX THUNDERFORM User manual

FORD F-150 EXT CAB
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 altera-
tions 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.
21A
7
250
Vehicle Specific Subwoofer Enclosure
Made in the USA
One Mitek Plaza, Winslow, IL. 61089
1-800-225-5689
www.mtx.com

READ ALL DIRECTIONS CAREFULLY BEFORE BEGINNING
MOUNTING LOCATION:
The enclosure mounts under the rear passenger seat
on Ford Extended Cab Trucks.
TOOLS REQUIRED FOR INSTALLATION:
Powered Screwdriver #2 Phillips Head Bit
Wire Cutters 5/16” Wrench
Terminal Crimpers T-50 Torx
7/16” Socket
INSTALLATION:
Follow the steps below
1
.
On 2000
and Newer Models
screw rubber foot to the front corner of the enclo-
sure using the 2" screw provided in the hardware pack.
2
.
Lift rear seats up, on models that have the jack mounted under the rear seat
on the passenger side of vehicle, will need to have the jack moved. Remove the
jack box and unthread the two bolt studs sticking out of the floor (you will want to
save these studs if you want or need to put the vehicle back in it's original condi-
tion). Place the two rubber plugs in the hardware pack in the bolt holes where the
two studs where. Take the jack box and place it on it's top on the drivers side of
the vehicle under the rear seat. Using the two screws and washer screw the jack
box to the floor of the vehicle as shown below.
3
.
Place enclosure under rear seat on passenger side with woofers firing down.
Using 1/4" lag bolt provided, screw enclosure to the floor of the vehicle. Then
proceed to Step 7.
2
5
.
Screw bracket to enclosure (with rear passenger door open you can screw
bracket to enclosure easily). Tighten the three torx bolts trapping bracket between
seat and seat bracket (make sure enclosure is tight to passenger side of the
vehicle and tight against the bottom of the seat).
2
6
.
On the drivers side of enclosure place furnished bracket onto top of seat
bracket. Screw bracket provided to the top of seat bracket with hardware pro-
vided and then to side of enclosure.
Enclosure
Fur
nished
Brac
ke
ts
P
assenger Side
Rear Seat Bottom
Seat
Bra
cke
t
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
Warning: Batteries normally produce explosive gases which can cause personal Warning:
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.
protect your eyes. Always provide ventilation.protect your eyes. Always provide
Conventional Wiring of Aftermarket Radi
o
Conventional Wiring of Aftermarket RadioConventional Wiring of Aftermarket Radi
_
_
+
20 Amp Fuse
Lo
w Le
ve
l Signal
Tu
rn
On Lead
INP U
T
RIGH
T
LEFT
LEFT
GAI
GAI
N
X-OVER
X-OVER
S
TATU
S
Optional EBC
(Electronic Bass Control)
1
6

4
.
On 1997-1999 models follow Steps
4-7
. Remove the three torx head bolts that
hold the rear seat on the passenger side to the seat bracket, you will see them
when you open the passenger rear door.
5
.
Insert bracket provided, between seat bracket and seat (furnished bracket
needs to point down).
Enclosure
Fur
nished
Brac
ke
ts
P
assenger Side
Rear Seat Bottom
Seat
Bra
cke
t
6
.
Place enclosure under seat with woofers firing down. Make sure enclosure is
against the bracket installed in
S
tep
5
.
7
.
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 nega-
tive to black terminal knob. On 1997-1999 models refer to
S
tep 2
5
for mounting
directions.
AMPLIFIED THUNDERFORM
Routing Power Wire; we recommend a connection directly to the battery.
8
.
Remove passenger side threshold trim; pull up on trim, it will remove easil
y.
2
0
.
Plug power wire harness into amplifier pre-amp.
2 0
A
P W
R
G N
D
REM
E B
C
INPUT
RIGH
T
LEF
T
GAIN
X-OVER
STATU
S
2
1
.
Replace
20
amp fuse under hood.
2
2
.
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.
2
3
.
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.
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 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.
T
ROUBLESHOOTING 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
2
4
.
Reinstall threshold trim. Locate and align holes in vehicle with pins on trim;
and snap back into place.
2
5

9
.
Remove rear passenger door threshold trim, pull up on trim, it will remove
easily
1
0
.
Using furnished wiring harness route 10ga red power wire starting at pre-
amp location. Route wire on passenger side, over to threshold and under carpet
to the front of vehicle.
1
1
.
Open hood.
1
2
.
Drill a hole through the
fire wall
. Locate a spot low on the
fire wall
on the pas-
senger side. You should always look to find a clear path. Drill a hole from inside
of the vehicle into engine compartment and insert grommet.
Fire
w
all
Batter
y
Dr
ill Hole
f
or Gromme
t
Note: To avoid any damage to parts inside engine compartment, drill from
inside of vehicle using a short bit.
1
3
.
Route 10ga red power wire through a grommet into the engine compart-
ment.
1
4
.
Route 10ga red power wire through engine compartment safely away from
any moving or hot parts that could damage the wire.
1
5
.
Cut 10ga red power wire to length, connect the supplied fuse holder from the
wire kit to the end of the wire.
1
6
.
Remove
20
amp 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 electronic components.
1
7
.
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.
S
PEAKER WIRES
1
8
.
You can find the factory speaker wires on the passenger side of the truck
under threshold trim removed in Step
9
. The wire colors are left channel; orange/
light green (positive), light blue/white (negative); right channel orange/red (posi-
tive), brown/pink (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 then physical verification is required.
C
ONNECTION TO ENCLOSURE
19
.
Connect speaker wire
R
CA's to the
inputs of pre-amp. You may have to
loosen mounting brackets to gain access to pre-am
p
.
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
EB
C
INP U
T
RIGH
T
LEFT
GAI
N
X-OVE
R
S
TATUS
GAI
STRIPED
SOLI
D
SOLI
D
Orange/Light Green (+
)
Light Blue/White (-
)
Bro
wn/Pink (-
)
Orange/Red (+
)
Optional EBC
(Electronic Bass Control
)
3
4