Picking up the old thread, but I have the IA-4 and it sounds superb with devore o93 speakers. Huge soundstage, feels lit from within, no grain, and a ton of body. Tends to illuminate everything in the upper midband with endless detail and no fatigue. Highly recommended combination. It seems like all the Masterclass products are proving positive, and this is the first SS amp I’ve really loved with these speakers more than high quality tube integrateds.
