Zapco ST-104D SQ III Amp 4-Channel Class D Compact Amplifier 4x100w RMS
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ST-104D SQ III
4-Ch. Class D Compact Amplifier
The ST-III amps were the first to get the new Studio brushed aluminum finned chassis
- 4-Channel, Full Range, Class D
- RCA and Speaker Level inputs
- Variable input gain control
- Variable electronic crossover
- Variable bass boost control
- Power @ 4Ω: 4 x 100 watts RMS
- THD @ Rated Power < 0.5%THD
- Power @ 2Ω: 4 x 150 watts RMS
- Power Bridged @ 4Ω: 2 x 300 W RMS
- Signal to Noise Ratio > 90dB
- THD + Noise < 0.1%
- Frequency Response 15Hz to 30KHz ±1dB
- Input Sensitivity .35v to 9v (Low)
- Net Dimensions (mm): 124(W) x 50(H) x 213(L)
- Overall Dimensions (mm): 124(W) x 50(H) x 242(L)
Specification
| Power @ 4Ω | 4 x 100 watts RMS |
|---|---|
| Power @ 2Ω | 4 x 150 watts RMS |
| Power Bridged @ 4Ω | 2 x 300 W RMS |
| Frequency Response | 15Hz to 30KHz ±1dB |
| Net Dimensions (mm) | 124(W) x 50(H) x 213(L) |
| Overall Dimensions (mm) | 124(W) x 50(H) x 242(L) |
More specs
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What's Included
- Zapco ST-104D SQ III
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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