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Hoel Wiring

Subwoofer Expansion Harness (Integrates w/ KEY200.4 Harness)

Regular price $130.00 USD
Regular price Sale price $130.00 USD
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Install Kit
Subwoofer Model

Harness Lead Times are Currently 2-3 business days after order!


This harness is designed to interface with existing KEY200.4 harness installations.  The harness daisy-chains in at the KEY200.4 input connector and provides a connector for the subwoofer of your choice.


Note this harness uses the left and right front speakers for the subwoofer input to pick up the full-range audio signal.  The signal is picked up on the input side of the KEY200.4 so that you can incorporate filters on the KEY200.4 without affecting the subwoofer input.


Expansion Harness Kit


You must have already purchased and installed a KEY200.4 harness for this harness to work.  It cannot be used as a standalone product.

Harness Length

All subwoofer harnesses are 20' in length.  This allows for installation virtually anywhere in the vehicle.


Install Kit Options

The subwoofer must be powered directly from the battery or a portion of the power distribution system.  The current draw is too high to power off an existing circuit in the vehicle.


Choose this option when you have your own power and ground wiring and all fuses and terminals needed for the installation.

Include Install Kit

The install kit option gives you everything you'll need with a pre-installed waterproof fuse and ring terminals for attachment to the battery and chassis.  This option includes a 22' power wire in nylon braided sleeving and 3' ground wire.  No extra work is required beyond routing the wires and attaching them to the battery and chassis.

The HS8/HS10 option includes 12ga wire and a 15A fuse.

The KEY500.1 option includes 8ga wire and a 60A fuse.

The RCA input harness does not have an install kit available due to variations in sub or amp models.

Return Policy

Returns are offered within 30 days of purchase. Shipping is non-refundable and the customer is responsible for return shipping costs.