I had Klipschorns for 25 years or so and absolutely loved them. I built my family room addition to accommodate these, so never had some of the issues others speak about. Drove them with several amps over the years and I would have to say an old refurbished 25 watt Baldwin amp built by Autospec (here on Audiogon) was one of the best sounding amps that went through my system. I never thought they went downstairs in the bass department though. I ran a subwoofer with them.