Classic Aleph Amplifier for Modern UMS Chassis Builder's Thread

Member
Joined 2020
Paid Member
I converted my Aleph 20 to balanced drive recently, as I have a balanced-out preamp that brings everything to the next level. Balanced drive seems to bring resolution and detail and it cleans up some of the harshness that comes with suboptimal sources. If you have the means, I highly recommend it.
 

Attachments

  • IMG_9940.jpg
    IMG_9940.jpg
    430.5 KB · Views: 38
  • IMG_9945.jpg
    IMG_9945.jpg
    473.8 KB · Views: 39
  • Like
Reactions: 5 users
Whole heartedly agree. I only use balanced inputs, especially when it’s intrinsically designed, i.e. with differential input pair stage topologies seen with many Pass circuits or use a very well designed differential to SE circuit. I have done the same with input transformers, but you do have to spend a little bit on the transformer itself…although you do save a bit since they don’t need their own separate supply. Choices.

With Aleph inspired circuits, my advice is to go balanced input directly and enjoy the improvements!

Best,
Anand.
 
  • Like
Reactions: 1 user
Official Court Jester
Joined 2003
Paid Member
there is a slight difference in performance, speaking of gadgets having input LTP, between SE and bal feed......... but I believe that any significant perception difference in sound rather comes from change of feeding gadget you made

in short- I believe change is rather from change in preamp than in Aleph per se

or, if same preamp, it is simply superior in balanced output mode, which is completely normal for inherently fully balanced circuits, regarding output performance

not to forget - "superior" strongly depends of ears of beholder

:clown:
 
  • Like
Reactions: 1 users
Whole heartedly agree. I only use balanced inputs, especially when it’s intrinsically designed, i.e. with differential input pair stage topologies seen with many Pass circuits or use a very well designed differential to SE circuit. I have done the same with input transformers, but you do have to spend a little bit on the transformer itself…although you do save a bit since they don’t need their own separate supply. Choices.

With Aleph inspired circuits, my advice is to go balanced input directly and enjoy the improvements!

Best,
Anand.

To be clear - if I am using balanced preamp outputs to balanced AJ inputs, an input capacitor is NOT required? I know you did not state that here, but it was alluded to in another post. My AJ (after warming up to about 40C) shows 1 or 2 mV of DC offset. I understand that's another way to avoid the coupling capacitor but it could be a long wait without AJ music!
 
If you can ensure that your source will always have a low DC offset, then yes, direct coupling and avoiding the input cap on the Aleph J is fine, as I did on the Aleph J Zen. However, I have found that if you are going for a certain ‘sound’ you can play with different input caps. Up to you, but remember the risk! This is a Classic Aleph thread though!

Best,
Anand.
 
  • Like
Reactions: 1 users
Member
Joined 2020
Paid Member
there is a slight difference in performance, speaking of gadgets having input LTP, between SE and bal feed......... but I believe that any significant perception difference in sound rather comes from change of feeding gadget you made

in short- I believe change is rather from change in preamp than in Aleph per se

or, if same preamp, it is simply superior in balanced output mode, which is completely normal for inherently fully balanced circuits, regarding output performance

not to forget - "superior" strongly depends of ears of beholder

:clown:
I did my best to listen to the XP-10 in system extensively before I rewired the Aleph. :) But alas I am impatient, and need to know, and also I play some of these same junk 90's CDs in the car during my commute, so my music memory is ruined daily, and every evening is a groundhog day.

But still, I did try my best to compare SE in situ to balanced. And even though my standard interval for comparison is months, not days, I could not help but share, here, my revelations on the potential of the Aleph Classic with balanced drive. As biased as it may be.
 
Official Court Jester
Joined 2003
Paid Member
not disputing what you said, just sharing my bias :clown:

even if PL preamp is used, count on fact that its SE output is not on par with normal - Bal output

they're simply constructed as that, all virtues of SUSY core are present with native output ........ and SE is sort of auxiliary gizmo

that speaking in engineering way of things ..... on the other hand - my brain is crooked, I like proper drek, whichever way it is sounding
 
  • Like
Reactions: 1 user
If you can ensure that your source will always have a low DC offset, then yes, direct coupling and avoiding the input cap on the Aleph J is fine, as I did on the Aleph J Zen. However, I have found that if you are going for a certain ‘sound’ you can play with different input caps. Up to you, but remember the risk! This is a Classic Aleph thread though!

Best,
Anand.

Yeah... C1 can easily be used to tune Aleph J sound to the rest of the system / individual preferences.
Without C1, the offset may never settle at exactly 0... it will vary somewhat... -10 to +10mV is the range you should aim for, without the C1 cap...