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Zapco ST-500XM III
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ST-500XM III

Class D, Mono

$299.99MSRP · USD

The ST-500XM III is a mono Class D bass amplifier in Zapco's Studio-X III Series, delivering up to 400 W RMS at 1 Ω with variable bass boost, subsonic filter, and strappable design for doubled power.

Key Features

  • Mono, Class-D bass amplifier
  • 1 Ω stable — strapable with a second amp for up to 800 W at 1 Ω
  • Remote dash control included
  • Variable low-pass crossover: 40–180 Hz
  • Subsonic (HP) filter
  • Variable bass boost: 0–12 dB (30–80 Hz)

Power Output

4 Ω Mono1 × 200 W
2 Ω Mono1 × 300 W
1 Ω Mono1 × 400 W

Performance

Amplifier ClassD
Channels1
THD at Rated Power< 0.2%
Frequency Response10 Hz – 200 Hz
Tested Voltage14.4 V

Connections & Controls

InputsRCA low-level
Gain200 mV – 5 V+ input sensitivity

Product Details

BrandZapco
SeriesST-X
ModelST-500XM III
SKUST-500XMIII
EAN8033373005374
Inquire to Order More ST-X

Genuine product · Authorized U.S. dealer · Drop-shipped direct

Documentation

Product Page at ZapcoOwner's Manual (PDF)