711smilin, against conventional wisdom, my Atmas have sounded great with a 4 ohm speaker - Frieds. Actually, they are the best amps I have come across for Frieds.
Now, understand that the series crossover (presenting a resitive load) might be the reason, but since your sensitivity is high enough, you might want to give it a shot. The other thing is that a lot of loudspeakers specify a nominal impedance of say, 8 ohms, but the actual curve shows them to be quite demanding. I hear the Reimers are a kind load to an amplifier.
Incidentally, have you bought a pair of Atmas yet? I have an ultra modified pair that I might be able to give you a really good deal on (not yet sure that I was going to sell them). They are MKII.3, plus A LOT of upgrades, such as the 12SX7 (instead of 6SN7 driver - better than any 6SN7), and some other unique things.
Now, understand that the series crossover (presenting a resitive load) might be the reason, but since your sensitivity is high enough, you might want to give it a shot. The other thing is that a lot of loudspeakers specify a nominal impedance of say, 8 ohms, but the actual curve shows them to be quite demanding. I hear the Reimers are a kind load to an amplifier.
Incidentally, have you bought a pair of Atmas yet? I have an ultra modified pair that I might be able to give you a really good deal on (not yet sure that I was going to sell them). They are MKII.3, plus A LOT of upgrades, such as the 12SX7 (instead of 6SN7 driver - better than any 6SN7), and some other unique things.