Kicker 47KEY500.1 Amp 1 Channel Smart Mono Subwoofer Car Amplifier up to 500w RMS
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The Kicker 47KEY500.1 is a single-channel smart mono subwoofer amplifier from Kicker's KEY range, delivering up to 500W RMS at 1 ohm with a built-in AI-driven DSP and Auto EQ. At approximately eight inches long and under two inches tall, it installs easily behind a glovebox, under a seat or in the boot.
Bass level can be adjusted from the dash with the optional 46CXARC remote bass control.
Key specifications
- Channels: 1 (mono)
- Power: 150W at 4 ohms, 300W at 2 ohms, 500W at 1 ohm
- Processing: AI-driven DSP with Auto EQ
- Crossovers: variable low-pass 40–160 Hz, variable high-pass 10–40 Hz, 24dB sub-sonic
- Inputs: high level 1–40 V, low level 125 mV–5 V
- Frequency response: 10–160 Hz; signal-to-noise ratio >90 dB
- Dimensions: 4.3 x 9.2 x 20.7 cm (H x W x L)
Smart mono amplifier and bass processor
The 47KEY500.1 combines a subwoofer amplifier and audio processor in one unit, built around Kicker's AI-driven DSP technology.
Auto EQ
Using Kicker's supplied test tones, the KEY analyses the incoming audio signal, corrects peaks and restores low bass that is typically lost in the source signal. Setup takes only a few moments and results in a clean, even bass response. Test tones are provided free of charge.
Controls
The KEY500.1 includes 24dB sub-sonic and low-pass crossovers alongside bass boost and gain controls, giving you straightforward adjustment of your sound.
Compact installation
At around eight inches long and under two inches high, the KEY500.1 fits almost anywhere — behind the glovebox, under a seat or in the boot.
FIT+™ compatibility
The KEY500.1 features FIT+™ (Fail-safe Integration Technology PLUS), providing near-universal compatibility with factory and aftermarket head units. It accepts factory input signals up to 40 volts (400 watts), making it suitable for virtually any vehicle audio system. If you need a higher-output mono amplifier, Kicker also offer the 46CXA800.1 delivering up to 800W RMS.
Explore the full range in Kicker Amplifiers.
Specification
| Frequency Response | (Hz) 10-160 |
|---|---|
| Input Sensitivity | high level: 1V-40V / low level: 125mV-5V |
| Signal-to-Noise Ratio | >90dB, a-weighted, re: rated power |
| Selectable Electronic Crossover | Variable Low Pass 40-160 Hz, Variable High Pass 10-40 Hz |
More specs
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What's Included
- 1 Channel Mono Amp
- Fuse holder
- Manual and installation hardware
Kicker
About the Kicker 47KEY500.1
From our tech experts at CEN
The Kicker 47KEY500.1 is a single-channel smart mono subwoofer amplifier delivering up to 500W RMS at 1 ohm. It includes an AI-driven DSP with Auto EQ, which analyses the incoming audio signal and restores low bass using supplied test tones. At 20.7 cm long and just 4.3 cm tall, it fits behind a glovebox, under a seat or in the boot.
Who it suits
This amplifier suits anyone adding a powered subwoofer who wants clean, corrected bass without complex manual tuning. FIT+™ technology accepts high-level inputs up to 40V, so it works with virtually any factory or aftermarket head unit. Those needing more output can step up to the Kicker 46CXA800.1, which delivers up to 800W RMS.
Our tech experts advise
Pair the 47KEY500.1 with a subwoofer rated to handle its output, and run the Auto EQ test tones before making any manual gain adjustments. The optional 46CXARC remote lets you adjust bass level from the dash after installation. Fitting cost varies by vehicle; our Nottingham installation team can advise.
Explore the full Kicker range at CEN, with fast UK dispatch and expert advice from our Nottingham team. Shop all Kicker
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Have it Fitted By Our Team
Our team fits car audio, stereos, dash cams and vehicle security at our workshop in Beeston, Nottingham. Tell us your vehicle and we'll confirm the parts and a fitted price.
- 1
Tell us your vehicle
Make, model and year, and what you'd like fitted.
- 2
We confirm the parts
Fascia, wiring and interfaces checked for your car, with a fitted price.
- 3
Fitted at our workshop
Bring it to our Beeston workshop and we do the rest.
Unit 25 Technology Drive, Beeston, Nottingham NG9 1LA
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Frequently Asked Questions
Q: How do I choose the right amplifier for my speakers or subwoofer?
A: Match the amplifier's RMS output per channel to the RMS handling of your speakers or subwoofer at the same impedance. The Specification tab lists the power figures. If in doubt, contact CEN with your setup and we will recommend a match.
Q: What wiring do I need to install this amplifier?
A: You will need an amplifier wiring kit sized to the amplifier's power draw, typically including power and earth cable, a fuse, RCA leads and a remote wire. CEN stocks complete wiring kits, and the amplifier's fuse rating is the guide to the cable gauge required.
Q: What class of amplifier is this and does it matter?
A: Class D amplifiers are compact and efficient, ideal for subwoofers and modern installs. Class AB designs are traditionally favoured for outright sound quality on mid and high frequencies. The class is listed in the Specification tab where provided.
Q: Will an amplifier work with my factory head unit?
A: Yes, in most cases. If your head unit has no RCA outputs you will need a line output converter to feed the amplifier a clean signal. CEN stocks line output converters and can advise the right one for your vehicle.
Q: Can CEN install this amplifier?
A: Yes. CEN offers professional amplifier installation from our Nottingham premises, including secure mounting, wiring and setup. Contact us to book.
Q: What does Auto EQ on the Kicker KEY500.1 do?
A: Using Kicker's test tones, the KEY500.1 analyses the incoming signal, corrects peaks and restores the low bass that is often missing, giving an even bass response.
Q: Will the KEY500.1 work with a factory radio?
A: Yes. It accepts high-level (speaker) input signals of up to 40 volts, and its FIT+ technology is designed to work with nearly every stock or aftermarket radio.
Q: How much power does the KEY500.1 deliver?
A: 500W RMS at 1 ohm, 300W at 2 ohms and 150W at 4 ohms, into one channel.
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