Do use the Google translation tools for the ultimate meat on the circuits of these ultimate Denon monsters. Inside is (was) some of the old and some of the new : old is the circuit structure and simplified power stage, new is (was) the UHC-MOS MOS-Fet power devices which were sourced from Hitachi, alongwith the related pre-driver circuit design and, apparently, an evolution of a Hitachi-patented circuit for the output section.Īll about the POA-S1 and the PRA-S1 can be read here - in french. Vanishingly low production run for those 79 kg (each !) beasts, each outputting 1,4kW output at 1 Ohm. X-rare power amplifiers launched when Japan's economy was steadily going down - and even lower.
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