Tubes with Infinity IRS Betas

SS amps like the big Threshold Class A mono’s with preferably ARC tube mono’s driving the mid/high panels is a well worn path. I recall Arnie Nudell voiced the IRS speakers with ARC tubes up top. The key is you need powerful ss amps to drive the bass towers, and reasonably powerful tube mono’s to drive the mid/high panels. Basically the more power, the better.

@georgehifi, You said it yourself "many moons ago"...let’s say customer A has a nice used pair of Beta’s, a fully refurbed Threshold S/500 Series II (of which you’re very familiar) and a 2nd hand ARC Reference 110 with new NOS tubes, where are you going to put the tube amp? Obviously on the mid/high panels. Today, refurbs and better NOS tubes offer performance gains which surely allow a fresh baked look at amplification options on old legends like the IRS Betas.

Yeah, cheers George...