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pass labs xa30.5 vs aleph 3

Stereophile reveiwer Erick Lichte has done a head to head review of these pass amps in August 2009 issue. Erick uses the aleph 3 as his main amp feeding a pair or Revel f30 speakers, he also uses Benchmark Dac1 to feed the alpeh as I do as well. He was asked to do a comparison between the pass amps as a follow up to the great reveiw of the xa30.5 which was reviewed by Brian Damkroger in which,I quote "absolutely, positively,and enthusiasticallly recommended" the xa30.5 and, Brian sounds like he perfers high powered amps in the review. In the review Erick thought the Xa30.5 sounded more resolving and a little bit better bass control and can sound louder than the 30 watts. It was leaner in the midbass than the aleph 3 but, had a slightly more presents in the top three octave. he still is in love with is aleph 3 and sound like he is not planning on replacing the aleph 3 with the xa30.5. Anyways I have been waiting for a head to head review of these pass amps since the xa30.5 was released. If anyone would like to see the head to head review send me an email and I will take a high res pictures of the artical and send it to anyone. Also Erick Lichte did a head to head review of the Musical Fidelity's 550k supercharger amp and the Aleph 3 in a December 2008 issue. He concluded the aleph sounded better than the 550's by itself. He then supercharged his aleph 3 but did not like the sound. Very interesting articals about my beloved aleph 3, and a great read for aleph 3 owners. In my opinion the aleph 3 is still a giant killer and is a legend when it comes to amps.
tiverson2000
tvad
9,467 posts
 
Is comparing the 140wpc MA-1 to the 30wpc XA-30.5 on Vandy 5A speakers
valid? According to most reports I have read, the 5A speakers like power,
despite having a powered subwoofer.

This test seems like comparing a penny nail hammer and a sledge
hammer.

It'd have been more equitable to place the XA-100.5 amps on the Vandy 5A
and comparing those to the MA-1 (or comparing a 30wpc Atma-Sphere S-30
to a XA-30.5).
madfloyd
411 posts
 
Hmm. While I'm not an expert on what the Vandy's need, I would think that the fact they have powered subs would mean they wouldn't require that much power.

The XA series is known for having a lot more power than the rated value (I think the rated value is for class A, after which it goes into A/B). While I wouldn't want to drive my Sophias with the XA 30.5, it was reviewed by someone (Stereophile or TAS, forget which) who had Sophia 2s and supposedly Pass thought it would have enough power.
tvad
9,467 posts
 
Look, I am not debating the existence of sonic differences produced by the
two brands on 5A loudspeakers. The point I am making is that comparing a
30wpc Class A amp to a 140wpc Class A amp is not apples to apples, and a
reader should give the comparison appropriate perspective so as not to make
a blanket judgment regarding the sound produced by a Pass Labs amp versus
an Atma-Sphere amp on the 5A speakers. Undoubtedly, the two brands
sound different, but how they differ in comparably spec'd models is unknown.

10-11-09: Madfloyd
Hmm. While I'm not an expert on what the Vandy's need, I would think that
the fact they have powered subs would mean they wouldn't require that much
power.
Read the threads, and you'll see that many owners have commented on the
benefits of more power when driving the 5A. Zybar's experience changing
from the 60wpc Atma-Sphere M-60 to the 140wpc MA-1 is one example.

10-11-09: Madfloyd
The XA series is known for having a lot more power than the rated value (I
think the rated value is for class A, after which it goes into
A/B).
The XA-30.5 leaves Class A at 60wpc peak.

Still not comparable to the 140wpc of the MA-1.

We all know from experience that any loudspeakers' sound changes as more
watts are added to drive it.
madfloyd
411 posts
 
I'm trying to say that I think the 'house' sound of the XA .5 series came through in the audition of the 30.5's.

George and I were curious to hear my XA 100.5s on his Vandys but having heard the XA 30.5s on them - and having it be *very* reminicent of the sound of my system (even with different speakers and preamp), we felt that we no longer needed to lug my 100.5's over to his house (I live close by).
tvad
9,467 posts
 
Well, when you're read to sell those XA-100.5, please send me an email. I'll take first dibs.
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