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SPEC RPA-W5ST

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Cost-effective stereo power amplifier, Spec's first dedicated power amplifier model. Features Class D PWM amplification with switching power supply, configurable for stereo, bi-amp, or BTL operation. Compact design with spruce and maple wood construction.

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eBay

SPEC Primain Amplifier (transistor) RPA-W5ST Used $3,212 Apr 3, 2026

eBay

SPEC RPA-W5ST Transistor Power Amplifier PWM Switching Audio Grade Used $4,084 Mar 13, 2026

eBay

SPEC RPA-W5ST Power Amplifier w/ Box Accessories Tested Japan JP Works MG01 9.0 $3,359 Jan 11, 2026

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