Zapco ST-1500XM III Amp Mono 1 Channel Class D Subwoofer Amplifier with Remote
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The Zapco ST-1500XM III is a mono, single-channel Class D subwoofer amplifier producing 1600W at 1 ohm, 1150W at 2 ohms and 800W at 4 ohms. It is part of Zapco's ST-X III mono amplifier range and includes a dash-mount remote gain control.
This listing is the ST-1500XM III. The ST-X mono range is also available as the ST-1000XM III and the ST-2000XM III.
Key specifications
- Model: ST-1500XM III
- Channels: 1 (mono), Class D
- Power @ 1 ohm: 1 x 1600W
- Power @ 2 ohms: 1 x 1150W
- Power @ 4 ohms: 1 x 800W
- Frequency response: 10Hz – 200Hz ±1dB
- Signal to noise ratio: >85dB
- Efficiency: >85%
- Dimensions: 160 x 58 x 400 mm (W x H x L, overall)
ST-1500XM III
A single-channel Class D subwoofer amplifier built on an aluminium chassis. The included dash-mount remote is the Zapco ST-BR remote level control, supplied as standard with Zapco's ST-X mono amplifiers.
- Variable input gain control
- Variable electronic crossover
- Variable subsonic filter
- Variable bass boost control
- Variable centre frequency for bass boost
- Variable phase control
- Strappable to use a pair of amps on a single voice coil
- Dash-mount remote gain control included
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Specification
| Power @ 1Ω | 1 x 1600 watts |
|---|---|
| Power @ 2Ω | 1 x 1150watts |
| Power @ 4Ω | 1 x 800 watts |
| Frequency Response | 10Hz to 200Hz ±1dB |
| Net Dimensions (mm) | 160(W) x 58(H) x 375(L) |
| Overall Dimensions (mm) | 160(W) x 58(H) x 400(L) |
More specs
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What's Included
- Zapco ST-1500XM III
- Zapco ST-BR remote level control
Zapco
About the Zapco ST-1500XM III
From our tech experts at CEN
The Zapco ST-1500XM III is a mono Class D subwoofer amplifier producing 1,600W at 1 ohm, 1,150W at 2 ohms and 800W at 4 ohms. It is part of Zapco's ST-X III mono range and ships with the ST-BR dash-mount remote gain control as standard. The aluminium chassis measures 160 x 58 x 400mm overall.
Who it suits
This amp suits builds where a single subwoofer needs substantial, clean power. Variable crossover, subsonic filter, bass boost and phase controls allow precise tuning to the install. Two units can be strapped to drive a single voice coil sub. Browse the full Zapco range for alternative options.
Our tech experts advise
Check your subwoofer's impedance and power handling before matching the input gain; the ST-1500XM III accepts 0.25V to 5V sensitivity. Net dimensions are 160 x 58 x 375mm, so measure your boot space carefully before mounting. Professional fitting is priced per vehicle — contact our Nottingham installation team for a quote.
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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: How much power does the Zapco ST-1500XM III produce?
A: The ST-1500XM III is rated at 1 x 1600 watts at 1 ohm, 1 x 1150 watts at 2 ohms and 1 x 800 watts at 4 ohms.
Q: Does the ST-1500XM III come with a bass remote?
A: Yes. It has a dash mount remote gain control. Zapco includes the ST-BR remote level control with its ST-X mono amplifiers.
Q: Can two ST-1500XM III amplifiers be linked?
A: Yes. The ST-1500XM III is strappable, so a pair of amps can be used on a single voice coil.
