Description
Included in this kit
This bundle includes a Kicker 53KEY2004 KEY 4-Channel DSP Smart Amplifier, 4x50W, and a Kicker 51HS12 Hideaway Compact Powered Subwoofer, 12-Inch.
1x Kicker 53KEY2004 KEY 4-Channel DSP Smart Amplifier, 4x50W (53KEY2004)
KEY200.4 – 200-Watt 4-Channel Amplifier with AI-Driven DSP
The KEY200.4 combines a compact 4-channel amplifier with automatic audio processing designed to improve clarity, tonality, and soundstage. Its internal processing uses an included microphone to automatically configure a 40-band equalizer, time alignment, speaker-size detection, and 24dB crossovers, while delivering 50 watts per channel at 4 ohms.
Overview
Amplification and Automatic DSP in One Compact Chassis
The KEY200.4 provides 200 watts of total power in a chassis measuring just 1-11/16 inches high, 2-3/4 inches wide, and 7-3/8 inches long. Its small footprint allows installation behind a radio, under a seat, or in a trunk.
In addition to amplification, the KEY200.4 uses an internal computer and included microphone to automatically analyze and correct the audio system. Processing includes automatic equalization, time alignment, speaker-size detection, and crossover configuration.
Power & Performance
50 Watts x 4 at 4 Ohms
- 200 watts total power (50 watts x 4 channels).
- 20Hz–20kHz frequency response, +0/-1dB.
- Signal-to-noise ratio greater than 90dB, A-weighted, referenced to rated power.
- High-level input sensitivity from 250mV to 10V.
- Bi-amp capability with defeatable operation.
Automatic Audio Processing
Microphone-Based System Correction
Press the selector and the included microphone allows the KEY200.4 to analyze the system and apply automatic processing. A 40-band equalizer adjusts tonality, while automatic time alignment and speaker-size detection help configure the system for improved soundstage and speaker performance.
Vehicle Integration
Designed for Factory and Aftermarket Systems
FIT2™ (Fail-Safe Integration Technology) provides compatibility with nearly every stock and aftermarket radio. The amplifier can turn on through either a remote 12-volt signal or DC offset and is compatible with newer vehicles using start-stop technology.
- FIT2™ integration technology included.
- Compatible with start/stop vehicle technology.
- Remote 12V or DC-offset turn-on.
- High-level input sensitivity from 250mV to 10V.
Dynamic Power Management
Automatic Peak Management
When the amplifier reaches its temperature threshold, dynamic power-management algorithms engage a limiter/compressor on musical peaks. The processing is applied for as little as milliseconds at a time while the amplifier cools, then disengages so the music returns to its full dynamic range.
- Automatic compressor functionality.
- Compressor can be defeated.
- Processing is applied to musical peaks when the temperature threshold is reached.
| Model | KEY200.4 |
| Power, 4Ω Stereo | 50W x 4 |
| Total Power | 200 watts |
| Microphone / Kicker EQ Button | Included |
| Standard Dimensions (H x W x L) | 1-11/16" x 2-3/4" x 7-3/8" |
| Metric Dimensions (H x W x L) | 4.3 x 7 x 18.7 cm |
| Frequency Response | 20Hz–20kHz, +0/-1dB |
| Input Sensitivity | High level: 250mV–10V |
| Signal-to-Noise Ratio | >90dB, A-weighted, referenced to rated power |
| Active Crossover | Off, 60, 80, or 120Hz; 24dB/octave |
| Equalizer | Automatic 40-band EQ |
| Time Alignment | Automatic, defeatable |
| Bi-Amp Capability | Yes, defeatable |
| Auto Level Adjustment | Bi-amp mode only |
| Speaker Size Detection | Automatic |
| Turn-On | Remote 12V signal or DC offset |
| Start/Stop Compatibility | Yes |
| Integration Technology | FIT2™ (Fail-Safe Integration Technology) |
Included Components
What's in the Box
- 1 – 4-channel power amplifier
- 1 – Microphone
- 1 – Microphone cable with switch
- 1 – Fuse holder
- 1 – Manual and installation hardware
1x Kicker 51HS12 Hideaway Compact Powered Subwoofer, 12-Inch (51HS12)
51HS12 – Hideaway™ HS12 Compact Powered 12" Subwoofer (230W RMS)
The Hideaway HS12 is a compact powered 12-inch subwoofer that delivers surprising low frequency impact in a tough, all-aluminum frame. Designed to fit under the seat, it combines an integrated amplifier with flexible input compatibility and onboard tuning controls for easy system upgrades.
Overview
Big Bass Impact in a Compact Powered Package
The HS12 delivers low-frequency output from a robust 12-inch powered enclosure engineered for tight installs. Its all-aluminum frame is built for durability, while the integrated amplifier and onboard controls make it easy to dial in clean, controlled bass.
- Compact powered 12" subwoofer enclosure designed to fit under the seat.
- 230 watts RMS amplifier power for strong low-frequency impact.
- Frequency response rated at 25–120 Hz.
The HS12 is designed to provide more power and a bigger impact than the 10-inch or 8-inch versions, while still fitting under the seat.
Integration
FIT+™ Wide-Range Inputs for Modern Vehicles
KICKER’s FIT+™ (Fail-safe Integration Technology PLUS) accepts input signals from 0.25V up to 40V (400 watts at 4Ω) and is compatible with newer vehicles using start/stop systems, helping the HS12 integrate with a wide range of factory and aftermarket systems without the added expense of a line output converter.
- Low-level input sensitivity: 250mV–10V.
- High-level input sensitivity: 1V–40V.
- Compatible with vehicles using start/stop systems.
Feature Highlights
Control, Tuning & Everyday Convenience
Installation
Compact Dimensions for Under-Seat Fit
The low-profile enclosure is sized for tight spaces while maintaining the output advantages of a 12-inch platform.
- Box Height: 3-1/2" (8.8 cm)
- Box Depth: 17-1/8" (43.5 cm)
- Box Width: 12-1/8" (30.8 cm)
- Weight: 17.5 lb (7.92 kg)
17' power input / 8' speaker-level input / 2' ground / 2' remote turn-on
Expandability
Run Two HS12s for More Output
For even more bass response, run two HS12s. If you’re using two mono amps or powered subwoofers, the KICKER DBRC Dual-Amp Bass Remote can control both from the same knob.
- Remote bass control included for single-HS12 level adjustment.
- DBRC Dual-Amp Bass Remote supports controlling two mono amps or powered subs from one knob.
| Model | 51HS12 |
| Subwoofer | 12" (30 cm) |
| RMS Power | 230 watts |
| Frequency Response | 25–120 Hz |
| Crossover | 12 dB/octave Lowpass 50–120 Hz; 24 dB/octave Highpass @ 25 Hz |
| Phase Switch | 0° / 180° |
| Input Sensitivity (Low Level) | 250 mV – 10 V |
| Input Sensitivity (High Level) | 1 V – 40 V |
| KickEQ Boost | Variable to +6 dB @ 40 Hz |
| Remote Bass | Included |
| Box Depth | 17-1/8" (43.5 cm) |
| Box Height | 3-1/2" (8.8 cm) |
| Box Width | 12-1/8" (30.8 cm) |
| Weight | 17.5 lb (7.92 kg) |
| Wiring Harness | 17' power input / 8' speaker-level input / 2' ground / 2' remote turn-on |