Ciriolo,
Where did you hear that Pass amps do not have good control of bass? They have one of the most realistic bass around. Just do a search on Pass amps in this forum, and read the reviews. This has been pointed out repeatedly by reviews and owners.
Tomer,
I had a 333 for 8 years, but traded it in for the X350.5 after the 333's capacitors blew up on me for the third time. I had paired the 333 with a pair of Thiel 3.6 at that time. I actually was more interested to upgrade my speakers than the amp at that time. After hearing the X350.5 with the Thiel 3.6, I had some second thoughts about replacing the speakers. (Currently driving a pair of Parsifal Encores)
A friend with a pair of B&W 802s came over for a listen few days after the amp arrived fresh from the factory, not even fully broken in yet. He had been using a 432 in his system. He went home, put his 432 on Audiogon, and bought an X350.5 that weekend. He is currently using a pair of Dynaudio C4. The guy is a big time trader on Audigon. Everything in his system has changed in the past 2 years except the X350.5, so I guess that speaks something about the Pass. I know he was tweaking his C4s for quite a while. It seems finicky regarding placement. It may just be due to his listening area.
FrankC