Our take on the Helix PP7E Compact Sub

by Buck Pomerantz

Bass made for the Plug and Play system

Helix makes the PP7E subwoofer to deliver great bass when you upgrade your vehicle's factory sound system with a PP50DSP processor and amplifier. The PP7E rocks with twin 7" subs in a vented enclosure that's compact enough to fit in most vehicles, yet strong enough to broadcast some impressive bass.

Proprietary cable included

The PP7E comes with a 15.75-foot PP-SC4 cable that connects the sub to your PP50DSP processor. You'll need the cable to connect this enclosure, since its two subs contain four separate voice coils, each powered by its own amp channel in the processor.

The Helix PP7E subwoofer works with the PP50DSP
processor and a vehicle-specific harness (not shown).

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Highlights:

subwoofer for Helix plug and Play system upgrade
two 7" DVC 2-ohm subwoofers
vented enclosure
includes 15.75-foot (4.8 m.) PP-SC4 cable for connection to PP50DSP
power handling: up to 200 watts RMS (400 watts peak power)
sensitivity: 90 dB
10-11/16" x 12-1/4" x 11-7/16"
warranty: 2 years
Our 60-day money-back guarantee

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Hands-on research from the Crutchfield Labs (what are the Labs?)

What’s in the box? | In-depth notes

Product Research

What's in the box?

Ported hatchback style enclosure with two subwoofers installed
16' PP-SC 4 cable
4 Steel grille rods

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Features

Overview: The PP 7E subwoofer is designed as an easy addition to the HELIX PP50 DSP plug and play digital signal processor/amplifier. The included PP-SC 4 cable connects the proprietary input terminal on the PP 7E to the subwoofer port on the PP50 DSP. The PP50 DSP powers the PP 7E subwoofer and is required for its use.

Driver Size: HELIX describes the size of the two subwoofers as 7" on their web site and on a sticker on the back of the enclosure. On the packing box they are described as 6-1/2". The speakers' frame diameter is similar to 6-3/4" car speakers.

Impedance: Both subwoofers have dual 2Ω voice coils. Each of the four voice coils is wired separately to the proprietary Molex input terminal.

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4 out of 5

Great sound!

Written By Rick, Barre, Vermont on Tuesday, May 14, 2013

Crutchfield Customer Review (What's this?)

I would recommend this to a friend. I purchased the Helix PP50DSP and later added this subwoofer. I had a lot of problems with the PP50DSP, which I wrote about in my review of that item. This subwoofer provides solid punch to the low end.

Pros:

Reasonable cost, great sound, and easy installation with the plug and play harness.

Cons:

This product will not cause damage to your trunk from overpowering sound vibrations. People will not notice that your vehicle approaching from ten miles away. If you are looking for something like that, you will not be satisfied.

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Helix PP7E Compact Sub

Vented enclosure with two 7" subwoofers

Item# 975PP7E offer details

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