How to Hook a Home Theater Sub to My Truck Radio

By Deronte' Smith

Truck stereos have come a long way over the years in their offerings as they are now indistinguishable from car stereos. Oftentimes your stereo is the prize possession of your truck's interior; but sometimes truck stereos and car subwoofers that accompany them simply do not deliver the bass -- you want to hear in your music of choice. Home theater subwoofers push nearly 10 times the power of car subs and can increase your bass output exponentially, if done right.

Things You'll Need

  • A home subwoofer
  • Low wattage car stereo amplifier
  • Pliers
  • Wire caps
  • Flathead screwdriver
  • Wood screws

Step 1

Purchase a low-wattage amplifier from your local stereo equipment store. The amplifier does not need to be expensive, as its purpose is to supply a minimal amount of power -- compared with the capacity -- to your home theater subwoofer.

Step 2

Unscrew the housing assembly for the plug adapter on the home subwoofer unit.

Step 3

Remove the electronic interior parts from the housing unit; carefully cut the speaker wires for later use. Cut the power cord and dispose with interior parts no longer needed.

Step 4

Secure your new amplifier in place with screws to the interior housing (wood) of the subwoofer.

Step 5

Connect the wires attached to the speakers to the amplifier. The positive wire will attach to the positive channel; connect the negative wire to the negative terminal as you would with a battery.

Step 6

Run your amplifier wiring to the front of your truck. If possible, hide the wiring under the carpet or under the side molding.

Step 7

Connect the RCA plug to the receptacle end at the back of your stereo.

Step 8

Turn on your system and test your connections, ensuring the subwoofer works before putting your dash back together.

Tips & Warnings

  • Pliers are the best tool for this job as they can be used for crimping the wire caps, cutting and stripping wire.
  • Be sure to cap your wires when connecting wires together; this will help to prevent separation of the wires and potential distortion.
  • Home subwoofers require a new amplifier acting as a power converter with the truck's lower amperage; trucks operate on 12 volts DC power at 2 to 4 ohms, whereas home theater systems operate on 120 volts at double the ohms.
  • The warranty of your stereo will likely be voided by aftermarket alternations.