The Cabasse Farella 401 speakers hit on all cylinders when paired with a quality SE or PP tube amp but hook a SS amp up to them and they would drive you from the room. Bright, fatiguing and light in the bass although the bass was always tuneful. Even pairing them with the class A SE SS Pass Labs Aleph 3 was a huge step in mitigating their bright signature but they are a real Jekyll and Hyde speaker if there ever was one.