"Do Pass amps down with impedance?" It depends on the specific amps. Some of the older Pass Aleph amps won't, and many of Pass's First Watt amps certainly won't. On the other hand many will. Nelson Pass has been most generous designing different amps for different applications.
Not only they double down, their power specs are very conservative. One example: the lowly XA30.5 is in reality a 130W@8Ω / 195W@4Ω amplifier, according to Stereophile measurements.
You must have a verified phone number and physical address in order to post in the Audiogon Forums. Please return to Audiogon.com and complete this step. If you have any questions please contact Support.