Zapco · ST-D Compact Series
ST-104D SQ III
Class D, 4-Ch — Power 2Ω: 4 x 150W, 4Ω: 4 x 100W
$299.99 MSRP · USD
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The ST-104D SQ III is a 4-channel Class D amplifier in Zapco's ST-D Compact Series, delivering 100 W per channel into 4 Ω from a chassis just 12.4 cm wide.
Key Features 4-Channel, Class-D full-range amplifier Ultra-compact chassis : 124 mm (W) × 50 mm (H)Low-Pass and High-Pass filter: 30 Hz – 3 kHz Speaker-level (high) and RCA (low) inputs 40 A fuse rating Power Output 4 Ω Stereo 4 × 100 W 2 Ω Stereo 4 × 150 W 4 Ω Bridged 2 × 300 W
Performance Amplifier Class D Channels 4 Signal-to-Noise > 90 dB THD at Rated Power < 0.1% Frequency Response 15 Hz – 30 kHz Tested Voltage 14.4 V
Connections & Controls Inputs RCA low-level (10 kΩ) and speaker-level (50 Ω) Gain 0.25–6 V (low) / 0.6–15 V (high)
Dimensions Overall (L × W × H) 242 × 124 × 50 mm Chassis (L × W × H) 213 × 124 × 50 mm
Product Details Brand Zapco Series ST-D Compact Model ST-104D SQ III SKU ST-104DSQIII EAN 8033373006043
Genuine product · Authorized U.S. dealer · Drop-shipped direct
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