With $250 upgrade to German WBT next-gen binding posts and Kimber TCX wiring. 550 watts into 4 ohms. "The Wyred 4 Sound ST 500 amplifier is an extremely powerful amplifier at an exceptionally affordable price that will find great appeal among the rabid audiophiles among us as well as to audio newbies and music lovers just looking to choose an amplifier they can live with and be done with their search...Wyred 4 Sound is a ground breaking accomplishment that'll bring a new level of power and sophistication to a budget conscious listening audience that could only dream of such performance before....The ST 500 has an excellent bass character. It's very highly damped and very controlled...has a beautiful midrange. Detailed and smooth. And like my own Bel Cantos, they set themselves apart from a lot of solid-state amplifiers ...Through the treble it sounds extended, musically detailed and solid....ST 500 will sound musically relaxed and sophisticatedly smooth. It'll sound more natural; more like real music. There's no artificial air or detail," said John Potis in Postive Feedback #39.