Synthesis art in music are very good amps! I've got two Synthesis Roma 510AC amps with KT88 tubes, one is powering my klipsch palladium P-38 towers, the second one is powering my Forté's. In my office I use a Synthesis 96DC push pull el34 class A amp together with Heresy's. The Synthesis Soprano, the amp you mentioned I think is on his way to me. I am a big fan! These amps sound very good, are still made by hand and are affordable. The grandfather of Luigi, the founder of synthesis made transformers for VOX guitar amplifiers back in the day.