2016–2021 Honda Civic Amp & Subwoofer Harness – Plug & Play LOC T-Harness, No Wire Cutting (LX/Sport/EX/EX-L)

Add an amp and subwoofer to your 2016–2021 Honda Civic without cutting a single factory wire. Line output converter (LOC) built in, so there's nothing else to buy for signal.

This plug & play T-harness connects directly behind your factory radio and has the line output converter already integrated and pre-wired. It converts the factory speaker-level signal to RCA outputs for your amplifier. No separate LOC to buy, mount, or wire. Install your amp and sub in under 30 minutes, and unplug it anytime to return your car to 100% stock.

Why this instead of a generic LOC and splicing?

• LOC included: no separate converter to buy, mount, or wire in behind the dash
• Zero wire cutting: plugs in between the factory harness and radio
• Fully reversible: remove it and your Civic is back to factory original, which is good for warranty and resale
• Clean, reliable connections: OEM-style connectors, no crimps, taps, or tape buried in your dash
• Fast install: typically under 30 minutes with basic hand tools

Fitment

Fits 2016–2021 Honda Civic (10th Gen) with the non-amplified factory stereo: LX, Sport, EX, and EX-L trims.

⚠️ Not compatible with Touring or other trims equipped with the factory premium/amplified audio system. Not sure which system you have? Message us with your trim and model year before ordering. We're happy to confirm fitment.

What's included

• 1× Plug & Play T-harness with integrated line output converter for the 10th Gen Civic factory radio
• Installation guide

NOTE: Amplifier power/ground wiring and RCA cables are sold separately.

How it works

1. Remove the factory radio trim (basic hand tools)
2. Unplug the factory harness from the radio
3. Plug the T-harness in between
4. Run your power and ground wiring from the battery to the amp (sold separately)
5. Run RCA cables from the harness's built-in LOC outputs to the amp (sold separately)

Designed and supported in Michigan, USA by Pulse Technology. Questions about your setup? Reach out anytime and get real support from people who actually install car audio.