Many Sophia Owners initially try Tube Amplifiers, but end-up with powerful Solid-State Amps. I've heard jaw-dropping demos of Sophias driven by high-quality, powerful Class A SS Amps., most impressively through Mono-Blocks. These Speakers are capable of incredible dynamics and imaging, especially when set-up properly in a large room. A flea-watt tube amp. may make them sound nice, but give them 300>400 good clean watts and they will sound real...