Zapco ST-64D SQ MINI Amp 4 Channel Class D Bridgeable Mini Car Amplifier
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The Zapco ST-64D SQ MINI is a micro-chassis 4-channel Class D bridgeable car amplifier, rated at 4 x 50W RMS at 4 ohms and 4 x 75W RMS at 2 ohms, from Zapco's SQ MINI range.
For more power in the same compact format, see the Zapco ST-104D SQ III 4-channel Class D amplifier.
Key specifications
- Model: ST-64D SQ MINI
- Channels: 4, full range, Class D
- Power @ 4 ohms: 4 x 50W RMS
- Power @ 2 ohms: 4 x 75W RMS
- Bridged @ 4 ohms: 2 x 150W RMS
- Inputs: RCA and speaker level, auto-on with speaker level
- Frequency response: 15Hz - 30kHz ±1dB
- Dimensions: 86 x 42 x 151 mm (W x H x L, overall)
ST-64D SQ MINI
4-Ch. Class D Mini Amplifier
A compact four-channel Class D amplifier that fits where full-size amps won't, without sacrificing sound quality. Accepts both RCA and speaker-level inputs, making it straightforward to install in factory and aftermarket systems alike.
- Optional HD Bluetooth
- Variable input gain control
- Variable electronic crossover
- Auto-on with speaker level inputs
- Micro chassis
- Variable bass boost control
Explore the full range in Micro Amplifiers.
Specification
| Power @ 4Ω | 4 x 50 watts |
|---|---|
| Power @ 2Ω | 4 x 75 watts |
| Power Bridged @ 4Ω | 2 x 150W RMS |
| Frequency Response | 15Hz to 30KHz ±1dB |
| Net Dimensions (mm) | 86(W) x 42(H) x 133(L) |
| Overall Dimensions (mm) | 86(W) x 42(H) x 151(L) |
More specs
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What's Included
- Zapco ST-64D SQ MINI
Zapco
About the Zapco ST-64D SQ MINI
From our tech experts at CEN
The Zapco ST-64D SQ MINI is a micro-chassis 4-channel Class D bridgeable car amplifier from Zapco's SQ MINI range. It delivers 4 x 50W RMS at 4 ohms, or 4 x 75W RMS at 2 ohms, with a bridged output of 2 x 150W RMS at 4 ohms. Overall dimensions are 86 x 42 x 151mm.
Who it suits
This amplifier suits anyone with restricted mounting space — behind a dashboard, under a seat, or in a compact boot build. It accepts both RCA and speaker-level inputs, so it works with factory and aftermarket head units alike. For more output power in a larger chassis, consider the Zapco HB 104D II.
Our tech experts advise
Auto-on via speaker-level inputs makes installation straightforward in vehicles without a remote turn-on output. The onboard variable crossover and bass boost allow basic tuning without a separate DSP unit. Fitting costs vary by vehicle; visit our Nottingham car audio installation page for details.
Explore the full Zapco range at CEN, with fast UK dispatch and expert advice from our Nottingham team. Shop all Zapco
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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
More from Zapco Amplifiers
More options from the same range, in stock and ready to go
Zapco ST-4B Amp 4 Channel Class AB Full Range Bridgeable Amplifier 4x 65w RMS
£119.00
View product
Zapco REF 150.6 6 Channel Class AB Amplifier 6x150w RMS
£1,299.99
Zapco Z-150.4 II Amp 4 Channel Class AB Bridgeable Amplifier 2x 550w RMS
£829.00
Zapco ST-1000XM III Amp Mono 1 Channel Class D Subwoofer Amplifier with Remote
£349.00
Zapco HB 84D Amp 4 Channel Class D Bridgeable Amplifier 4x75w RMS
£239.00
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 ST-64D SQ MINI produce?
A: It is rated at 4 x 50 watts at 4 ohms, 4 x 75 watts at 2 ohms, or 2 x 150 watts RMS bridged at 4 ohms.
Q: Does the ST-64D SQ MINI have Bluetooth?
A: HD Bluetooth is optional on the ST-64D SQ MINI rather than built in.
Q: How small is the ST-64D SQ MINI?
A: It measures 86mm wide, 42mm high and 133mm long (151mm overall).
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