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Aleph P 1.7 Volumecontrol Output-imendance question
Aleph P 1.7 Volumecontrol Output-imendance question
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Old 7th January 2014, 07:28 PM   #11
Epsen is offline Epsen  Germany
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Hello audiosan, i have read this, Thats right. Oh man....


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Old 7th January 2014, 08:51 PM   #12
Danger Mouse is offline Danger Mouse  Germany
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Quote:
Originally Posted by Epsen View Post
Hello Danger, Danke

when the Impendance of the volume attenuator is constant (input 10 K and Output 10 K) maybe its better to use it before the Aleph-P-stage? I hope the output imedance of the Pre is lower in this way, because 10k Outputimedance is very high to drive longer cables (inputimbedance of used Poweraps is 20k).

What are the cons when i do this?


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Thomas
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Old 7th January 2014, 08:52 PM   #13
Danger Mouse is offline Danger Mouse  Germany
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I have done it this way #1824
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Old 7th January 2014, 09:00 PM   #14
Danger Mouse is offline Danger Mouse  Germany
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or if its not so good to see

after the input selector from the LSQR3 you have the possibilitiy to loop in the aleph ore something else

(from the lsqr3 to the aleph p and back to the lsqr3)

...some have it some not...
...if you have problems with distortion with the preamp try 221ohm at input from the aleph p worked wonders in my case.
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Old 7th January 2014, 10:29 PM   #15
AudioSan is offline AudioSan  Norway
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Nice preamp danger mouse

Last edited by AudioSan; 7th January 2014 at 10:31 PM.
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Old 8th January 2014, 10:06 AM   #16
Epsen is offline Epsen  Germany
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Ok guys,

i has spoken with the german guy how bulild this LSQR.

its not the best choice for the Aleph P.

now ill build an Attenuator with shunt/character.

whats better for the P, 5K or 10K *for the output imendace*?
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Old 8th January 2014, 07:46 PM   #17
Zen Mod is offline Zen Mod  Serbia
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Aleph P 1.7 Volumecontrol Output-imendance question
original P1.7 attenuator is shunt type

go figure

less is better
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Old 25th February 2014, 07:24 PM   #18
Epsen is offline Epsen  Germany
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One question, is here any measurement of the aleph p? (Distortion or something) I didn't found anything in the web.


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Thomas
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Old 25th February 2014, 11:04 PM   #19
Danger Mouse is offline Danger Mouse  Germany
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from service manual:

Distortion < 1% THD

Max Out 20 volts rms.
bal out 10 volts rms. unbal out

-if i remember right ask generic he maybe had made some messurements

-or build this pre, mostly you will not regret

only thing you maybe think about if you have a clone is:
-> will the orginal AlephP sound better?

this can drive you nuts
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Old 26th February 2014, 04:51 AM   #20
generg is offline generg  Germany
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Aleph P 1.7 Volumecontrol Output-imendance question
Some data are here....

cygnus.ipal.org/mirror/www.passlabs.com/apstphle.htm

Unfortunately the graphs for distortion and so on are not included in the reprint.
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