Simply put the best sounding amplification I have ever owned and I am reluctantly selling them only because the home I recently relocated to has a listening room less thah half the size that these amps previously resided int. I am the original owner and these particular amps, and aferfter receiving them they were placed on a pair of amp stands and never moved except when making speaker cable changes. They look today identical to what they looked like 4 years ago when I received them. These amps replaced a pair of X600.5 amps and I preferred the sound of the XA100.5's across every genre of music that I listen to. Original boxes and packaging material included and the amps are in the same condition as when I unpacked them a little over 4 years ago. Long time Audiogon member with over 100 transactions with 100% postive feedback so you can buy with the confidence that you are buying from a reputable seller. Stongly prefer buyer pickup and if you are looking to upgrade from a pair of xa60.5's and they are less than five years old I will swap you these amps for yours plus $2,000.
If you go to the Pass Website they have a Q&A section that has a question: Why Class A? The answer on their site is "Because it sounds better - Pure and Simple".
Thanks for looking!