going Pass Labs, do I need "Class A " ?

I would go with Class A if you can afford it. Yeah, that price over there in Russia might be too tough. But, here in the US, we have much higher prices for high end European and some high end Japanese imports compared to Europe and Japan. I don't know where these distributors get those prices from, but I hope there's a logical explanation. Anyway, that's another topic for another time.

Good luck!

I have the XA 60.5. didnt listen to the 350's. The XA60.5 has been a revelation in my system and has plenty of bass. Very tight and controlled. I think many times differences are due to interactions between amps front end and speakers. Dont make a decision from the 30.5, it was not enough class A power to run my Dynaudio speakers. The amps would go into AB. The 30.5 has plenty of power to run the speakers but the sound character changes. I would advise you to check out the 60.5.

Sergei

As far as I know and i'm also from a 220v country [Israel] the xa range can't be converted internally from 110v to 220v and I don't think you want to use a transformer which might kill dynamics. Try to look for a used one on audio-markt.de [you have a 60.5 listed there currently].
I own a pair of 60.5 and they are glorious. Good luck anyways.

Hey Sergeik,

I have owned the X-350.5, XA-100's and now use XA-60.5's in my system. For the details on each amps performance take a look at my reviews here on the GON on allof them. Their is no doubt that the XA.5 series amps are Nelson Pass's best generation yet of his designs. Have not heard his new much more expensive four box monoblocks yet, but I'm sure their something special.

Sergei - I would strongly advise you to email or call Pass Labs and ask them about the 110V/220V issue. IME, their customer service is excellent, and the information they give you will be definitive.

Also, I suggest you read Teajay's reviews of the Pass amps he's owned. They're illuminating and may help you make a decision.

Bryon