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  Pass Labs amp choice for CLS - What would you do?
After much reading and soul searching I have decided to upgrade the amp on my CLS speakers. I can buy a used X350.5 (current generation) or a pair of X600 mono blocks (previous generation - can't afford the X600.5) for a similar price. Is the .5 model change significant? There is no way that I can audition/compare them on my system, so I will have to take a leap of faith. I know I can't go wrong, but what would you do? And what pre-amps should I be looking at?
Dchazen  (Threads | Answers | This Thread)

10-07-09
  Responses (1-12 of 12)
Click title to read one, or click date to read all below it.

10-07-09   The x-600 amps are great! i had a pair for 2 years and am a ...   Srwooten

10-07-09   Dchazen, take a look at my gon reviews of the 350.5, xa-100' ...   Teajay

10-07-09   Teejay- my comments were only on the x-600's to help the op.   Srwooten

10-08-09   Srwooten, i hope my comments regarding my experience with th ...   Teajay

10-08-09   Teajay- thanks for clarifying. no offense taken.   Srwooten

10-08-09   Dchazen, to the question between between x350.5 or x600. i ...   Analog_soul

10-08-09: Dchazen
Thanks for the feedback. As I continue to talk to people and read it is becoming clear that the .5 model change is important. The CLS likes a lot of power and the impedance can dip down to 2 ohms, so the amp has to be stable. I understand that the original XA series had issues with handling low impedance speakers, but this was corrected in the .5 series. The pure class A power of the XA is supposed to be phenomenal sounding, but the class A watts are more expensive. On the other hand, I have read that you don't need as many class A watts to drive the same speaker. I have seen comments that the X350.5 and the XA100.5 are the "sweet spots" in the Pass Labs model line up in terms of power that can handle most speakers and bang for the buck. If the choice is between the X350.5 (MSRP $11K) and the XA100.5 (MSRP $16K), then what would you say?
Dchazen  (Threads | Answers | This Thread)


10-08-09   Dchazen, if it's in your budget, in my opinion, you should g ...   Teajay

10-08-09   I also recommend the xa100.5. in my review on audiogon, i c ...   Peterayer

10-09-09   I'd also recommend xa-.5 over xa or x-.5. you may not have ...   Jylee

10-09-09   "if the choice is between the x350.5 (msrp $11k) and t ...   Onemug

10-09-09: Dchazen
Thanks for all the suggestions. I spoke to Pass Labs and was told that the equivalent power amp for the X350.5 is the XA100.5, with maximum outputs of 28 amps each. I'm afraid that the smaller XA amps might have trouble driving the difficult CLS speakers.
Dchazen  (Threads | Answers | This Thread)



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