Just so you know ARC preamps are not really balanced according to the official balanced guidelines they do offer balanced type connectors. As a result the ARC preamps don't work well with low impedence amplifiers like many solid state amps are. I'm not sure about Pass. But I would consult with both companies before I mixed them just to be sure. Impedence mismatches are more common than you might think and are sometimes the reason why we think some components may not sound good.
Pass XA Monoblock Amps with Audio Research Preamps
Have any of you Pass XA.5 owners matched up your amps with the Audio Research LS-27, Reference 3, or Reference 5 preamps. I own the Pass XA100.5 Monos and appreciate your thoughts related to this combination of a solid state amp with tubed preamp. Thanks Stephen