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Old 20th November 2011, 10:27 AM   #11
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I'm just thinking. Dangerously expensive I know.

How about utilising the Litespeed idea for switching audion ?

None of the matching problems as the devices would be used at their extremes (Fully illuminated) and (Fully dark)
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Old 20th November 2011, 10:32 AM   #12
Zen Mod is online now Zen Mod  Serbia
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Location: ancient Batsch , behind Iron Curtain
convenient , but for my knowledge relays are better
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa... by Mighty ZM
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Old 22nd November 2011, 12:51 AM   #13
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Originally Posted by KatieandDad View Post
Papa knows his stuff.

I've been blown off my feet with my Aleph 4.

Iwouldn't mix digital volume controls with his circuitry though. Why feed fine wine through a dirty pipe.
the original aleph p use exactly the same.
so i guess you say that you do not like the original aleph p?
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Old 22nd November 2011, 10:41 AM   #14
JLH is offline JLH  United States
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The very best passive preamp I've ever heard was an autoformer based one. It was remote controlled and used mercury wetted relays to switch between the attenuation taps on the autoformer. Completely transparent and maintained dynamics into the very low volume settings like I’ve never heard before.
Ah, how beautifully the orchestra sounds before a rain! In a dry sunny day there is no way for the instruments to sound this way!
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Old 22nd November 2011, 05:34 PM   #15
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Originally Posted by AudioSan View Post
the original aleph p use exactly the same.
so i guess you say that you do not like the original aleph p?
I've never tried an Aleph P but would interested to see how it is built.
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Old 29th November 2011, 03:38 PM   #16
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I've got all the components to build an Aleph P1.7. Anyone got any ideas about the best PCB.

KK-PCB do one, its expensive. RSTAUDIO.DE did one but I can't find a supplier.

May have to reverse engineer the RSTAUDIO board. Mmmmm Lots of work I think.
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Old 29th November 2011, 05:45 PM   #17
Murdoc is offline Murdoc  Germany
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You can drop him a message and ask if he has boards left or would produce some more. Perhaps I'm also on the look for good boards in the near future.

Kind regards,
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Old 29th November 2011, 06:49 PM   #18
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the question is very interesting, the aleph p 1.7 is the next project that I intend to make once they have completed my speakers
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Old 13th January 2012, 02:25 PM   #19
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Default Aleph P1.7 capacitors?


I'm fresh on this pages, and registered in order to get some answers to my Aleph P1.7 and Aleph 5 construction.

I have a quite huge stock of Wima caps on the shelf, and want to know if there is a problem in using 1uF / 250V MKP10 blocks, instead of the stated 10uF Wima's on the original schema?

I think it will only have some infuence on the frequency response which will change from 0,5Hz to 5Hz in the lower regions...or not?

Can someone please help me on this?

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Old 18th July 2012, 11:32 PM   #20
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Default Power cable

I am slowly but surely getting this build organised. Based on good experiences from others and patience in explaining by Mikkel I have decided to use the Dantimax boards.

I will place the PSU's (1 for each channel + whatever is required for the Dantimax boards), Dantimax Control2 and FrontPanel boards + OLED Display in a separate enclosure. The main enclosure will contain the Aleph P1.7 boards, as well as Dantimax Input2 and RelVol3.

I was planning on using a 4 or 5 pin XLR to bring 2 x 60V DC + SgnGnd + ChsGnd from the PSU enclosure to the main enclosure, but have just seen that the Neutrik XLR's are officially rated at 7.5 or 10A (which is fine because the Aleph P1.7 draws little current), but at 50V AC.
How big of a problem is this?

I would love to hear what have others used to get 60V DC from one enclosure to the next?



Enclosed a pdf of my design of the rear panel of the main enclosure.

Edit: The engraving is missing from the PDF. Left lower are XLR for Aleph and RJ45 for Dantimax. Others are main out (XLR and RCA), Tape in/out and 5 x input.
Attached Files
File Type: pdf rear panel p1.7-Model.pdf (19.5 KB, 129 views)

Last edited by albertNL; 18th July 2012 at 11:35 PM.
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