Custom Audio was presented the opportunity to add a subwoofer to the factory audio system in a leased 2021 GMC Terrain. The customer had one and only request besides adding bass of course. She did not want anything to be drilled into the vehicle.

Starting from front to back, we installed our power wire with a fuse holder roughly 15 in. from the battery. On the driver side fire wall, there is a 3 in. by 3 in. grommet behind the coolant reservoir. We made our hole and passthrough easily with a drip loop inline. All wiring under the hood was protected with flex-loom. We used the Stinger Select SS1200XS Amplifier Wiring Kit to provide us with the appropriate 4 gauge power and ground wire.  

From past experiences, GM vehicles advertise their "Premium Audio System" on the door speaker grill and or on the radio. This was not the case. After further investigation, this vehicle had an unmarked amplified audio system with the amplifier being in the center console. From there, we tagged rear left and right speaker wires using the military splice method. This involves removing the wire insulation, without cutting the wire, soldering our wire onto the factory wiring, wrapping the soldered connection in electrical tape and the zip-tying all connections. After, the harness was re-taped with Tesa tape to give it the OEM look. Signal and power were ran to underneath the driver seat, where the JL Audio JD500/1 and LOC-22 would live. Securely mounted on an ABS plate, the equipment would not budge.  The bass knob, RBC-1, was then ran to the center console and mounted with double sided tape.

An L-shaped cover was made to protect the equipment from being kicked. The cover was finished in black carpet. With the speaker wire ran to the trunk, copper wire tinned and equipped with the appropriate color coded shrink wrap, this subwoofer was ready to be tuned. When setting the JL Audio LOC-22, it is important to follow the instructions provided to get the optimal signal for your amplifier. This ensures that the amplifier does not have to over work itself to compensate for a weak audio signal.

The customer was extremely happy with the output of this small but mighty JL Audio CP112-W0v3 BassWedge ported enclosure. More than she had expected! One of the cool features about all BassWedge enclosures is that you can mount the woofer downwards. The box has feet on either side that allows this. This also exposed the stitched JL Audio logo. With every installation, there is always something to learn. Definitely caught us off guard when we discovered that it was an unmarked amplified audio system.  

 Are you interested in upgrade the audio system in your vehicle? Contact us or stop in our retail store in Erie, PA!