Compact 4-channel amplifier with automatic tuning DSP — 50 watts RMS x 4 47KEY200.4

$399.99

The biggest advance - in the smallest package.
Introducing the KEY smart amplifier and audio processor in one, featuring AI-driven DSP.

[ user’s manual ]

The biggest advance - in the smallest package.
Introducing the KEY smart amplifier and audio processor in one, featuring AI-driven DSP.

[ user’s manual ]

    • 4-channel car amplifier/sound processor

    • 50 watts RMS x 4 at 4 ohms

    • CTA-2006 compliant

    • non-bridgeable — minimum impedance of 4 ohms per channel

    • Class D amp technology

    • KEY Auto Setup customizes the signal for your vehicle

      • calibration mic and activation button included

      • pink noise test tones available from Kicker.com

      • automatic adjustments include 40-band EQ, 24 dB/octave crossover filters, time alignment

    • Bi-Amp mode applies tweeter/woofer crossover settings during KEY Auto Setup

    • switchable auto compression

    • selectable high-pass filters (off, 60, 80, 120 Hz; 24 dB/octave)

    More Info:

    • automatic limiter with clip lights

    • preamp and speaker-level inputs

      • DC offset sensing turn-on with speaker-level inputs

    • Radio-Detect circuit supplies speaker load for receiver to sense

    • wiring and hardware not included with amplifier

      • 12- or 10-gauge power and ground leads recommended

    • fuse rating: 20A x 1

    • dimensions: 7-3/8"W x 1-11/16"H x 2-3/4"D

  • ⚙️ Performance Specifications

    • RMS Power Output (Watts x Channels): 50 x 4

    • Minimum Impedance (Unbridged): 4 ohms

    • Frequency Response: 20 Hz – 20 kHz

    • Total Harmonic Distortion (THD) @ RMS Power: 1%

    • Signal-to-Noise Ratio: 90 dB

    • Input Voltage: 14.4V

    🎛️ Features

    • Amplifier Class: D

    • Built-in DSP: Yes

    • Remote Control: No

    • Low-Pass Crossover Frequency: 640 Hz, 3200 Hz

    • Low-Pass Slope: 24 dB/octave

    • High-Pass Crossover Frequency: 60, 80, 120, 320, 3200 Hz

    • High-Pass Slope: 24 dB/octave

    • Bass Boost: No

    • Fan Cooled: No

    • Fuse Rating: 20 A

    • Speaker-Level Inputs: Yes

    • Preamp Outputs: No

    📏 Dimensions

    • Width: 7-3/8"

    • Height: 1-3/4"

    • Depth: 2-13/16"

    • 4-Channel amplifier

    • 12" Power/ground/speaker output harness

    • 12" Input harness

    • Loop wire w/ inline fuse holder

    • 20-amp ATO fuse (installed)

    • Calibration microphone w/ attached 11.5' cable and inline Activation button (cable terminated in a 3.5mm TRS plug)

    • 16" Rubber microphone strap

    • Two 12" wire ties

    • Four 1" screws

    • Quickstart guide