Your choose: Toyota Supra JBL add-a-sub T-Harness

Toyota Supra JBL add-a-sub T-Harness


The T-harness for 20-pin MOST OEM amps is used to interface aftermarket amplifiers to the OEM amp to power trunk subs or/and underseat woofers. No other speaker can be amplified by aftermarket amp.

Line Output Converter required and NOT INCLUDED. No remote signal is provided by harness. 

For MOST OEM amps of 500W and above a LOC is required to handle 40V/400W per channel inputs. 

Please note that the T- Harness will not work if JBL OEM amp is defective/malfunctioning; harness is not designed to replace MOST OEM amp.

Kit includes:

  • OEM amp harness
  • PnP OEM woofer pigtail for connection via harness

15 in stock

By clicking on PayPal Checkout button you agree with Shipping Instructions

SKU: Supra - NBT/TopHiFi-T-Sub Categories: ,


T-Harness includes pigtail interfaces for a 2ch Line Output Converter (NOT INCLUDED) and OEM woofers direct connection. No need to cut, splice, or tap the OEM woofer wires.

Additional information

Weight .5 lbs


There are no reviews yet.

Be the first to review “Toyota Supra JBL add-a-sub T-Harness”

Questions before ordering?

Please send us a message