It does matter. I had an amp with two sets of red binding posts. The manual made no mention of the purpose so I connected black to black and red to the post nearest to black. Long afterwards someone suggested one may be 4 Ohms and the other8. Via Audiogon I verified that and I had been connected to the wrong impedance. The sound when I corrected my mistake was clearly better. It matters.
4 8 or 16 ohms.
Hi group I just purchased the Audio Research REF 750s mono amps. On the back for the speaker terminals are 3 sets of binding posts. 4 8 and 16 ohms. I will be using B&W Matrix 800 speakers. I believe they are 8 ohms but not 💯 sure. I looked in the manual but can’t find anything about ohms. Someone said to me it does not matter what ohms I connect my speakers to. He said just use the ones (ohms) that sound best. Does that seem right to do ? I don’t want to damage my speakers or amps.  BTW if it matters I will be using an Audio Research REF 6SE pre amp.Â