What are the weak points of Pass amps and pre-amps ?


Though there are perhaps better transistor amps, but Pass seems to be an excellent choice for many.
What is your experience with them, if you could elaborate ? Integrateds as well.
inna

Showing 13 responses by jetter

I have never heard a Pass amp.  But I wish someone would come up with some serious weak points so I won't feel I absolutely have to have a XA25.
Well thanks medwardo and jahatl, you have both convinced me that the XA25 is not worth the investment.  Well that's totally not true, and in time I feel I will be purchasing one, but not for a little while yet.  Enjoy the Pass, and its all fun.  
George
pistha, while you were talking with Pass Labs did you ask them their opinion regarding the XA25 driving your Sophias? I ask because I believe my speakers also dip rather low although I only know their nominal impedence.
dep14, Bo does not have one purchase or sale on A'gon.  At first I use to read his posts years ago, then stopped completely and won't again.  But as far as I know he has never tried to sell anything and I don't think you could hire him to install a system.  But he kills threads with pages and pages and pages of posts all saying the same thing.
cowan217, agree about all the great pass reviews.  But a lot of us call whatever we have as the best thing ever.  Then out next purchase is the new best thing better than what we had before.  Its good to know if there is something not perfect about an item to see if that "thing" is a deal breaker or not of consequence to us personally. 

I have never heard a pass, but I think that other than the heat I would love to have one.  
Hi inna, I have been considering purchasing a pass amp, so I have been following this thread. You inquired regarding the weak points of pass amps, and just guessing you received about 99 responses praising their sound, and two or three not positive responses. I thought the responses were overwhelming favorable, do you mind mentioning what lead you to think otherwise? Thanks
Hi inna, I completely understand regarding cost.  I am thinking of what I believe is the least expensive amp, the XA25.
pwhinson, when you previously wrote that Pass recommended the X series over the XA series I wondered if they mentioned to you why they made that recommendation?  I am sorry to say that I have never heard a Pass, but it would seem that either series has high wattage amps that will drive most speakers, and that which you purchase is a matter of whether or not you prefer a class A sound and a matter of costs? 
Hi kosst, I think that opens up a whole can of worms of whether a low or high efficiency speaker inherently sounds the best? One would think that if all high efficiency speakers sound better than their low efficiency counterparts there would be no need for higher powered amps as there would be no speakers needing that power.

Now going off thread, I guess the question is what are the advantageous and disadvantageous of low and high efficiency speakers?
I am wondering why all speakers are not high efficiency?  Why make medium or low efficiency speakers at all, what are their advantages?
Like a lot of audio equipment, living here in Vermont, I haven't had a chance to hear a pass amp.  But I think you can pretty much summarize from this threads lack of comments on their weak points, that most everyone is positive (very ?) about them. The class A heat being an obvious, to be expected, point.  There were just a couple of outliers.