I have been interested in the Arro's, but my Cary DJH Superamp has 8 ohm speaker taps, and the Arro's are 4 ohm (and only 87db efficient). I have found that tube amps like a heavier ohm load, or they loose bass weight. When properly matched ohm loads are present, speakers sound well balanced, but when a lower ohm load is present they loose bass and the Midrange jumps out front with a very fatiguing forward sound. Anyone else have this experience?
It was dramatically demonstarted on my Mesa Baron, which had a 4/8 ohm switch which I could use on-the-fly. I had Tannoy D-70 speakers which are rated 6 ohm Nominal/4 ohm Minimum, but read 2.6 ohm at the binding posts with an OHM meter. They sounded great on 8 ohm, anemic on 4 ohm.
Curtis