Can't speak to the PS Audio integrated, but I have a W4S STI-500 integrated amp which serves as a preamp to a 7-channel W4S MC7x250 power amp feeding three sets of Monitor Audio Golds and my surrounds. Both amps are routed through a PS Audio Power Plant P5. In short, this combination provides a super low noise floor, excellent music presence and depth. The W4S stuff is top rate as is the PS Audio stuff. My sources are routed through a W4S DAC-2, a fabulous machine in its own right.
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