Accuphase P-7100 / P-7300 on the back: load impedance 2-16ohms at normal operation / 4-16 ohms at bridge connection.
On the P-7500 more power into 8 ohms and 4 ohms but I believe it is only 4-16 ohms in normal operation / 8-16 ohms at brige connection.
P-7100 had 1000 W peak at 1 ohms and 12-parallel push-pull output stage in each channel.
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