Zapco ST-4B Amp 4 Channel Class AB Full Range Bridgeable Amplifier 4x 65w RMS
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ST-4B
4-Ch. Class AB Amplifier
4-Channel, Class-AB Full Range Amplifier, Stable into 4 ohms bridged or 2 ohms stereo load
- MOSFET power supply
- RCA and OEM speaker level input
- Variable Inputs Gain Control
- Variable FULL / LP / HP Electronic Crossover
- Variable Bass Boost
- Power @ 4Ω: 4 x 65 watts
- Power @ 2Ω: 4 x 90 watts
- Power @ 4Ω Bridged: 2 x 180 watts
- THD @ Rated Power < 0.2%
- Signal to Noise Ratio > 90dB
- Channel separation > 45dB
- Frequency Response 10Hz to 20KHz ±1dB
- Input Sensitivity .25v to 5v
- Net Dimensions (mm): 182(W) x 52(H) x 280(L)
- Overall Dimensions (mm): 182(W) x 52(H) x 310(L)
Specification
| Power @ 4Ω | 4 x 65 watts |
|---|---|
| Power @ 2Ω | 4 x 90 watts |
| Power @ 4Ω Bridged | 2 x 180 watts |
| Frequency Response | 10Hz to 20KHz ±1dB |
| Net Dimensions (mm) | 182(W) x 52(H) x 280(L) |
| Overall Dimensions (mm) | 182(W) x 52(H) x 310(L) |
More specs
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What's Included
- Zapco ST-4B
FAQs
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.
About the brand
Zapco
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