Its a range. If your speakers operate mostly in a range from 2-4 ohms, use those taps. Or, if your speakers are a little easier to drive and they operate mostly above 4 ohms, use those taps. But like others have said, try both and use the ones that sound best.
VAC Amplifier Speaker Output Taps
My VAC amplifier has output taps labeled 2 to 4 or 4 to 8. I was wondering whether this means that the first tap is 3 ohm and the second 6 ohm. If my speakers are nominal 4 ohm with minimum of 3.2 ohms, is there a correct choice from a technical or electrical standpoint. I've tried both without appreciable difference in sound.
Thanks!
Thanks!