901 series 2 speakers

I never liked them. They have horrible lower bass and no high end. Consider this: New replacement drivers are $6.00 each. You have 18. That is $98 worth of drivers. The good thing is that they make great PA speakers. Bar Bands used the carpet covered 802s, which used the same drivers. On midrange only music, such as Bose dealers used to demonstrate them 40 years ago, they really put out a lot of sound. If you want to impress someone, play conga and other drum music. In a comparison I saw in Jacksonville back then, 901's were compared to B&W DM14's, another speaker with sonic issues due to not having a midrange. The Bose were blown away, even on bongos and congas. I use my old DM14's on my TV. I could live with these speakers only.  I used stacked pairs, then electrostatics with them. If you want to test the actual theory of the 901 design, take any speaker and turn it at a 45 degree angle facing the wall behind them. BTW, I had a Phase Linear 400 for years. This amp deserves a good preamp and speakers.