KICKER 51HS12 Hideaway Compact Powered Subwoofer
- 12 inch driver, 230 W RMS onboard amplifier
- 460 W maximum output power
- 25 to 120 Hz frequency response
- RCA or speaker-level inputs, 0.25V to 40V
- 3.5 inch tall all-aluminum enclosure
- Wired remote level control included
- 17.5 lb, 1 year warranty
Last refreshed Oct 2, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A slim powered subwoofer with a built-in amplifier that fits under many seats. It accepts RCA or speaker-level inputs and includes a bass remote and wiring, but it is built for modest bass and a single driver.
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ASIN: B0FXBS8WYFModel: 51HS12Category: Enclosed Subwoofer Systems
Overview
Sliding under a seat or into a tight cargo corner, this KICKER Hideaway pairs a subwoofer driver with its own amplifier in a low-profile aluminum enclosure. A multi-length wiring harness comes with it.
Everything lives in one box: the amplifier, the driver and the controls, so no separate amp is needed. The limit is output for its size, since a slim enclosure cannot move as much air as a large box.
Who it's for
Drivers of cars with limited room and a factory or aftermarket stereo get a clean add-on. Anyone chasing maximum output, or needing marine use, should step up to a larger box and amplifier.
Pros and cons
- Slim enclosure fits under seats
- Accepts RCA or speaker-level inputs
- Wired remote level control
- Wiring harness included
- Modest output for the size
- Single driver only
- Impedance not listed
Performance notes
A compact amplifier drives the driver through an adjustable crossover, high-pass filter, bass boost and phase switch, so the bass can be blended with the existing speakers. The FIT+ input stage accepts a wide signal range, which lets it connect to factory head units without a converter.
Where it stands among enclosed subwoofer systems
- #2 most-searched brand and model of the 20 enclosed subwoofer systems lines we track (by search demand, not sales).
From the specs of the 14 enclosed subwoofer systems we list; not a test result.
Specifications
| Brand | KICKER |
|---|---|
| Model | 51HS12 |
| Dimensions & fit | |
| Driver size | 12 inches |
| Dimensions (D x W x H) | 17.2"D x 12.2"W x 3.5"H |
| Item weight | 17.5 pounds |
| Capacity & performance | |
| Maximum power | 460 watts |
| Power & efficiency | |
| Amplifier RMS power | 230 watts |
| Input voltage | 12.6 volts |
| Warranty & support | |
| Warranty | 1-Year Manufacturer Warranty |
| Other details | |
| Low-pass crossover | 12 dB/octave, 50 to 120 Hz |
| High-pass filter | 24 dB/octave at 25 Hz |
| Phase switch | 0 and 180 degrees |
| Input signal | RCA or speaker-level, 0.25V to 40V |
| Bass boost | Up to +6 dB at 40 Hz |
| Frequency response | 25 to 120 Hz |
| Waterproof | No |
| Control | Remote (wired remote included) |
Frequently asked questions
Will the KICKER 51HS12 work with my factory stereo?
The description says its FIT+ input accepts 0.25V to 40V, so it connects to factory and aftermarket head units through RCA or high-level speaker inputs, with no external line output converter needed.
Does the KICKER 51HS12 need a separate amplifier?
No. It has an onboard 230-watt RMS amplifier.
What wiring comes with it?
A multi-length wiring harness with power, speaker-level input, ground and remote turn-on leads, plus a wired remote level control.