Zapco · ST-B Series
ST-5B
Class AB, 5-Ch — Power 2Ω: 4 x 100W + 1 x 400W
$249.99 MSRP · USD
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The ST-5B is a 5-channel Class AB amplifier in Zapco's ST-B Series, combining four full-range channels with a high-power mono subwoofer channel to deliver a complete system in one compact unit.
Key Features 5-Channel, Class-AB full-range amplifier Stable into 4 Ω bridged or 2 Ω stereo load MOSFET power supply RCA and OEM speaker-level input Variable Full / LP / HP electronic crossover Variable bass boost Power Output 4 Ω (4 ch. + sub) 4 × 70 W + 1 × 250 W 2 Ω (4 ch. + sub) 4 × 100 W + 1 × 400 W 4 Ω Bridged + 2 Ω sub 2 × 180 W + 1 × 400 W
Performance Amplifier Class AB Channels 5 Signal-to-Noise > 97 dB THD at Rated Power < 0.2% Frequency Response 10 Hz – 30 kHz ±1 dB Tested Voltage 14.4 V
Connections & Controls Inputs RCA and OEM speaker-level Gain Variable input gain control
Dimensions Overall (L × W × H) 381 × 182 × 52 mm Chassis (L × W × H) 351 × 182 × 52 mm
Product Details Brand Zapco Series ST-B Model ST-5B SKU ST-5B EAN 8033373005848
Genuine product · Authorized U.S. dealer · Drop-shipped direct
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