Speakers ratings are always approximative, just look at any measured impedance curve. They give a rough idea of how hard they might be to drive. I doubt many amp's 4 and 8 ohm hook-ups are exact either. The obvious thing is to start with 4 to 4, let the amp run in, get familiar with the sound, then change to 8 to see what differences you notice, and whether they're better or worse.
Rookie Question, maybe
I have finally brought home the Primaluna Prologue and LOVE it. Here is my question. I have a set of Martin Logan Bookshelf speakers that I am using temporarily until the room that the amp and speakers are going in is finiahed. The speakers are rated at 4ohms but compatible with 4,6, and 8ohm amps. The Primaluna have speaker hook ups for both 4 and 8 ohm speakers. How should I hook up the speakers to get the best sound but not overload the amp, or does it really matter? I listen, for the time being, at low to medium volume.
Cheers
Cheers