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Zapco ST-104D SQ III Amp 4-Channel Class D Compact Amplifier 4x100w RMS

Zapco ST-104D SQ III Amp 4-Channel Class D Compact Amplifier 4x100w RMS - Main image
$178.71 $259 In stock

Category: Amplifier

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)
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Customer Reviews (5.0 / 5 · 5 reviews)

Eli E. ★★★★★

I was a bit worried about the speaker level inputs not working cleanly with my factory head unit, but they provide a solid, noise-free signal. The brushed aluminum chassis really is as nice in person as it looks in the pictures.

Chloe ★★★★★

The finned aluminum chassis looks way more expensive than it is and stays cool even after a long drive. Speaker-level inputs made swapping out my old factory unit a breeze, and the 4x100w headroom is plenty for my door speakers.

Owen ★★★★★

Packed this into a tight corner of my boat's console and it stays cool even after hours of use. The brushed aluminum fins really do help with heat dissipation.