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Zapco ST-104D SQ III — Amplifier photo
Zapco · Amplifier

ST-104D SQ III

4-Channel Compact Class D Amplifier delivering 100W RMS of daily-driver Zapco power.

Committed to Excellence. The ST-D Compact series delivers Zapco's Class D efficiency in a space-saving chassis. It serves the practical middle of the Zapco lineup, bringing real Zapco performance to tight installs and multi-amp builds.Configured as Class D 4-Channel SQ Compact, the ST-104D SQ III is rated at 4x100W @4Ω. It is 4Ω stable.Ideal for space-limited SQ installs, it pairs naturally with ESB 4000 and 5000 Series component speakers.

DAILYSQL
Max Output
100 W
Impedance
4Ω stable
$299.99

Our actual price is below the manufacturer's advertised minimum — final price is shown in cart.

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  • Free US shipping
  • Manufacturer warranty

SKU: ZAP-AMP-ST104DSQIII-4CHD

Overview

Built for the install, not the spec sheet

Committed to Excellence. The ST-D Compact series delivers Zapco's Class D efficiency in a space-saving chassis. It serves the practical middle of the Zapco lineup, bringing real Zapco performance to tight installs and multi-amp builds.

Configured as Class D 4-Channel SQ Compact, the ST-104D SQ III is rated at 4x100W @4Ω. It is 4Ω stable.

Ideal for space-limited SQ installs, it pairs naturally with ESB 4000 and 5000 Series component speakers.

Specifications

Measured, not marketed

Power

ConfigurationClass D 4-Channel SQ Compact
RMS4x100W @4Ω

Electrical

ClassClass D
Impedance4Ω stable
Frequency Response

Physical

Weight8.0kg
EAN8033373006043
Documents

Datasheets, manuals & templates

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Designed For

Which build is this for?

DAILY

Daily Driver

Balanced everyday upgrade.

See matching DAILY builds
SQL

SQL / Loud

Maximum output for the meter.

See matching SQL builds
Complete the System

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