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Helix PP-AC37 Plug and Play Harness

Connects a Helix processor/amplifier to select 2000-up Scion and Toyota vehicles

Item #: 975PPAC37

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1 Review

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The Helix Plug and Play system

A Helix Plug and Play system will make a dramatic improvement in your vehicle's stock audio system — very cool news if you lease your vehicle or don't want to remove your factory radio.

The system starts with this vehicle-specific adapter harness that plugs in between your car's stock radio and speakers, inserting the Helix PP52DSP or PP82DSP signal processor into the chain. Each processor uses a program developed specifically for your vehicle to transform your system, using sophisticated equalization and time alignment to compensate for the weaknesses in your factory speakers, along with a built-in amplifier that boosts performance up a notch or two. You'll enjoy focused, clear, and powerfully moving music from your car's factory radio. Warranty: 1 year.

Note: This Helix harness plugs in between your vehicle's factory radio and speakers, so it will not work in a premium sound system equipped with a factory amplifier.

Helix PP-AC37 Plug and Play Harness Reviews

Average Customer Review:

1 Review

Works with 2013 Toyota Entune Nav Head Unit

Written by: Shilly from Castle Rock, CO on September 22, 2013

2013 Toyota Camry
Crutchfield Customer Review (What's this?)

Plugs into Helix PP50DSP harness and allowed for plug-and-play installation with my 2013 Camry SE with Entune and Navigation (Non-JBL System). A YouTube video showed me how to remove head unit from the dash. There is a stubborn Satellite antenna plug in the back, but other than that plug, this harness makes it a true plug-and-play install.

Pros: Works with the newer Toyota Entune system without the optional JL Audio speaker system.

Cons: If it is mentioned in the Helix PP50DSP listing I missed it, but in order to use the optional sub that works with this system, you have to run a 20-Amp fused circuit to the unit from the battery through the firewall. Not impossible - but takes it out of the realm of plug-and-play.

Hands-on research

What's in the box?

Download owner's manual

  • Helix vehicle specific adapter harness

Product Research


Overview: This vehicle specific harness makes adding select Helix amplifier/digital signal processors to a compatible vehicle a plug & play solution. It can also be combined with the EPC5 Easy Plug Cable (item number 975EPC5, sold separately) to make installing the P-DSP digital signal processor much easier (supplies the P-DSP with a speaker level signal input, power, and ground). Please confirm compatibility using the Crutchfield Vehicle Selector.

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