Hardware · Completed

Automotive Electrical and Mods

Installed a full aftermarket audio system in my 2021 Camry, including power wiring, an amplifier, and a line output converter, along with several other mods.

12V electricalWiringAmplifiersInstall workFabrication

Vehicle2021 Toyota Camry SE

AmpAlpine mono

SubAlpine Type-S 12"

Wiring4-gauge kit

Audio system install

I planned and installed the whole system myself:

Power: ran 4-gauge power wiring from the battery through the car to the trunk, with proper fusing and grounding.
Signal: tapped the factory rear speaker wiring at the B-pillar and fed it into a CT Sounds line output converter (LOC) so the factory head unit could drive the amp.
Mounting: mounted the Alpine mono amplifier and the LOC in the trunk and wired in the Alpine Type-S 12" subwoofer.
Result: installed, tested, and working.

Other mods I installed

K&N cold air intake
Aftermarket tail lights
Duck-bill trunk spoiler

In progress

Next up are a custom 3D-printed grille add-on (3D scanned with RealityScan and designed in Fusion 360), a fiber-optic starlight headliner, and an interior trim blackout.

What it shows: reading wiring and following it through a vehicle, working safely with high-current DC power, and finishing installs cleanly.

Photos

CT Sounds line output converter mounted in the trunk, with the speaker-level inputs and outputs wired in

Close-up of the LOC terminals: factory speaker signal in, RCA-level signal out to the amp

The LOC mounted and secured before wiring

Tapping the factory rear speaker wires at the B-pillar harness

Signal wires routed along the factory harness and taped in, tucked under the trim