MTX THUNDER FORM F250X00BK20A-TN User manual

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F250X00BK20A-TN / F250X00C20A-TN
FORD F-250 / F-350 SUPER CAB
VEHICLE SPECIFIC SUBWOOFER ENCLOSURE
OWNER’S MANUAL

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THANK YOU
Thank you for making the AWESOME decision to purchase our MTX Audio vehicle specic
subwoofer enclosure designed for the Ford F-250 and F-350 Super Cab. Our sub enclosure, with its
two 10" Terminator subwoofers, will belt out the bass and deliver ground pounding audio making you
the party vehicle! With a few basic hand tools in your trusty toolbox, you can have this installed in no
time. So, what are you waiting for? It’s time to get the rumble in your ride! Oh, and congratulations
on your purchase, thanks for your support and most importantly, enjoy the ultimate audio experience
with MTX!
WE’RE HERE TO HELP
We’re here to help with any installation or technical support. Visit mtx.com to chat, call
1-800-225-5689 to speak with an MTX Technical Support representative, or visit
youtube.com/user/MTXAudioUSA to view product videos.
DON’T FORGET TO REGISTER YOUR PRODUCT
Don’t forget to register your new MTX Audio product. Visit mtx.com/productregistration or scan the
QR code to the right.
Model #
Serial #
Dealer’s Name
Date of Purchase
IMPORTANT NOTICE
Whenever working on the vehicle, it is recommended to disconnect the battery prior to starting work.
Failure to do so may lead to a risk of electric shock or equipment damage.
When connecting power and ground wires ensure that the red power wire is fused at the point
where it is connected to the vehicle’s battery. Failure to do so can result in damage to the vehicle if a
short circuit develops between the vehicle connection point and the product.

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FEATURES
• Includes two MTX 10" Terminator Subwoofers
• Integrated Amplier Easily Connects to Existing Systems
• Rotationally Molded Design, Finished in Black or Charcoal
• Mounts Under Rear Bench Seat with No Loss of Leg Room
• EBC and Wiring Harness Included
SPECIFICATIONS
• Dual 10" Amplied Subwoofer Enclosure
• RMS Power Handling: 200-Watts
• Peak Power Handling: 400-Watts
• Signal-to-Noise Ratio (1 Watt): > 75dB
• Frequency Response: 10Hz - 78Hz
• Impedance: 4Ω
FIT GUIDE
F-250 Super Cab .....................................................................................................................................2000 - 2014
F-350 Super Cab .....................................................................................................................................2000 - 2014
REQUIRED TOOLS
• Powered Screwdriver
• #2 Phillips Head Bit
• Wire Cutters
• 5⁄16" Wrench
• 6" Bit Holder Extension
IN THE BOX
• F250X00BK20A-TN or F250X00C20A-TN Amplied Subwoofer Enclosure
• EBC
• Wiring Harness

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INSTALLATION
Step 1 - Slide front seats to full forward position and fold up rear seats. This will give you more room
to work with.
Step 2 - Remove jack tools from oor and set them aside (you will reinstall them later in Step 23). The
jack does not need to be removed and stays in factory location.
Step 3 - You may want someone to help you for this step. Lift enclosure into your truck and place it on
the oor behind the front seats with the woofers facing up.
Step 4 - If externally amplied, make speaker connections to the enclosure from the amplier.
Connect speaker wires from amplier to enclosure, positive to red terminal and negative to black
terminal.
Amplied ThunderForm
Note: When routing power wire we recommend a connection directly to the battery.
Step 5 - Remove driver side and passenger side threshold trim; pull up on trim, it will remove easily.
Step 6 - 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 carpet to the front of vehicle.

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Step 7 - Open hood.
Step 8 - Drill a hole through the re wall. Locate a spot low on the re wall on the passenger side. You
should always look to nd a clear path. Drill a hole from inside of the vehicle into engine compartment
and insert grommet. You may also nd a pre-existing, unused rubber grommet in this location that you
can pass the wire through. Note: To avoid any damage to parts inside engine compartment, drill from
inside of vehicle using a short bit.
Step 9 - Route 10ga red power wire through grommet into the engine compartment.
Step 10 - Route 10ga red power wire through engine compartment safely away from any moving or
hot parts that could damage the wire.
Step 11 - Cut 10ga red power wire to length, connect the supplied fuse holder from the wire kit to the
end of the wire.
Step 12 - 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. Place ring terminal on battery post and
retighten nut. Note: Always turn the ignition OFF when connecting or disconnecting battery cables.
Failing to do so may damage electronic components.
Step 13 - Ground amplier 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.
Firewall
Drill Hole for
Grommet
Battery

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Step 14 - Connect remote (Blue) wire to 12-volt switched accessory. To turn on the amplier unit, a
switched 12-volt signal is required. Locate a 12-volt wire that is active when the vehicle key is on and
connect the blue remote wire to it. This may be found in the fuse panel, key-switch or radio harness.
Speaker Wires
Step 15 - In the channel on driver side threshold, locate the left rear speaker wires wrapped in black
tape. Wire colors for the left rear speakers are; tan / yellow (positive) and gray / light blue (negative).
In the channel on the passenger side threshold, locate the right rear speaker wires. Right rear
speaker wire colors are; orange / red (positive) and brown / pink (negative). Tap into wires and route
over to passenger side threshold and to pre-amp on enclosure. Connect to the supplied High Level
input harness wires and plug into the matching port on the pre-amp.
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 verication is required.
Connection to Enclosure
Conventional Wiring of Factory Radio
Conventional Wiring of Aftermarket Radio
Green (-)
Green / White (+)
Gray (-)
Gray / White (+)
Gray / Light Blue (-)
Tan / Yellow (+)
Brown / Pink (-)
Orange / Red (+)
Blue Turn On Lead 12V Switched Source
Source Unit
Red Power Wire
Black Ground Wire
Attach Ground Wire Directly to
Vehicle Frame After Clearing
Area of Debris and Paint
_+
20 Amp Fuse
Optional EBC
(Electronic Bass Control)
RCA Interconnects
Blue Turn On Lead
Source Unit with
RCA Outputs
Red Power Wire
Black Ground Wire
Attach Ground Wire Directly to
Vehicle Frame After Clearing
Area of Debris and Paint
_+
20 Amp Fuse
Optional EBC
(Electronic Bass Control)

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Step 16 - Plug power wire harness into amplier pre-amp.
Step 17 - Replace 20 amp fuse under hood.
Step 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.
Step 19 - Adjust gain.
Setting Gain
Turn gain knob on ThunderForm pre-amp to minimum, counter clockwise. Play a favorite song 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.
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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Step 20 - Reinstall threshold trim. Locate and align holes in vehicle with pins on trim; and snap back
into place.
Step 21 - Place the driver side of enclosure in rst, so it ts into the seat bracket. Then slide the
passenger side, so the enclosure is tight against the seat bottom.
Step 22 - Using the supplied hardware, secure the enclosure to oor of vehicle as shown below.
Step 23 - Slide jack tools into center compartment under enclosure.

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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 ames, 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.

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NOTES

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WARRANTY PERIOD
At MTX Audio we engineer products that will stand up to the test of time. We also realize that from
time to time a problem may occur. That’s why our products carry a 2-year limited warranty that begins
at the time of sale to the end user.
Of course, we’re here to help. If you experience an issue with any of our products within the warranty
period, please contact our customer service technical line at 1-800-CALL-MTX to help troubleshoot
your issue. If, after speaking with our technical experts it is determined that a problem lies with the
product, the technician will provide you with a Return Authorization number and all relevant details
you’ll need to get the product taken care of.
MITEK WARRANTY
MiTek Mobile products (including, but not limited to: MTX, Coustic, Streetwires, Xtant, BassSlammer,
and Thunder Marine) purchased in the USA from an AUTHORIZED MITEK DEALER are guaranteed
against defects in material and workmanship for the period of time specied. The warranty period
begins the day the product is purchased by the end user, and this warranty is limited to the original
retail purchaser of product. Products found to be defective during the warranty period will be
repaired or replaced with equivalent product by MiTek at no charge. This warranty is void if it is
determined that unauthorized parties have attempted repairs or alterations of any nature, and the
warranty does not extend to cosmetics or nish. MiTek disclaims any liability for other incurred or
consequential damages resulting from product defects. MiTek’s total liability will not exceed the
purchase price of the product.

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© 2021 MiTek Corporation. All rights reserved. MTX is a trademark of MiTek Corporation. All other trademarks
are property of their respective owners. Designed and Engineered in the U.S.A.
Due to continual product development, all specications are subject to change without notice.
MTX Audio, 4545 East Baseline Rd. Phoenix, AZ 85042 U.S.A. 1-800-225-5689
MTX006400 RevA 2/21 • 1-10531
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