Zapco ST-A1 Amp Android Unit Class AB Amplifier Plug & Play 4x35w RMS
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The Zapco ST-A1 is a compact plug-and-play Class AB amplifier designed for Android head units, rated at 4 x 35W RMS at 4 ohms (4 x 70W max). It is part of Zapco's ST-A series.
Key specifications
- Model: ST-A1
- Channels: 4, Class AB
- Power @ 4 ohms: 4 x 35W RMS (4 x 70W max)
- Inputs: 4 balanced high-level
- Outputs: 2 RCA for amplified subwoofer
- EQ: 3-band
- THD @ rated power: <0.1%
- Signal to noise ratio: >85dB
- Channel separation: >70dB
- Frequency response: 20Hz – 20kHz
- Dimensions: 103(W) x 45(H) x 151(L) mm
The Zapco ST-A1 plugs straight into Android head units, adding clean amplified power without complex installation. If you need more channels or higher power, Zapco also offer the ST-4B 4-channel Class AB amplifier at 4 x 65W RMS and the ST-5B 5-channel Class AB amplifier.
ST-A1 Android Unit Class AB Amplifier
- 3-band equalisation
- 4 balanced high-level inputs
- High-quality op-amp
- 2 RCA outputs for amplified subwoofer
- Over-current and over-voltage protection
- High-temperature protection
- Power @ 4Ω: 4 x 35 watts
- Power max: 4 x 70 watts
- THD @ rated power <0.1%
- Signal to noise ratio >85dB
- Channel separation >70dB
- Frequency response: 20Hz to 20kHz
- Dimensions: 103(W) x 45(H) x 151(L) mm
Explore the full range in Zapco Amplifiers.
Specification
| Power @ 4Ω | 4 x 35 watts |
|---|---|
| Power Max | 4 x 70 watts |
| Frequency Response | 20Hz to 20KHz |
| Dimensions | (mm) 103(W) x 45(H) x 151(L) |
More specs
| |
What's Included
- Zapco ST-A1
Zapco
About the Zapco ST-A1
From our tech experts at CEN
A multi-channel amplifier from Zapco, Class AB, rated at 35w RMS.
Who it suits
Drivers building a front stage that needs each channel doing a defined job. Zapco amplifiers are bought by people who care what the power figure actually means rather than what it says on the box.
Our tech experts advise
Matching the amplifier to the speakers matters more than headline watts, and gains want setting with a meter. It needs a fused feed from the battery on the correct cable gauge. Installation is priced per vehicle, so get in touch with your make, model and year and we will confirm what it needs. See car audio installation.
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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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
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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 head units is the Zapco ST-A1 designed for?
A: The ST-A1 is a plug and play amplifier designed for Android head units, connecting through 4 balanced high-level inputs.
Q: Can I add a subwoofer to the ST-A1?
A: Yes. It has 2 RCA outputs for an amplified (active) subwoofer.
Q: How much power does the ST-A1 produce?
A: It is rated at 4 x 35 watts at 4 ohms, with 4 x 70 watts maximum.
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