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Old 28th April 2003, 03:53 AM   #1
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Default which pass amp for ellis audio 1801b's?

Can anyone offer advice on which pass amp to build to match with the Ellis Audio 1801b's? They are 83db @ 1w/1m efficient, and very accurate. Preferably I would rather one that sounds more "tube-like" to match with the 1801b's. Thanks
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Old 28th April 2003, 08:06 AM   #2
Jean is offline Jean  United States
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I vote Aleph 2 . Why you ask ? Simple, I am making a pair
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Old 28th April 2003, 05:09 PM   #3
labjr is offline labjr  United States
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I don't see much interest in the Aleph 60. Even though there were some improvements over the Aleph 2.

Of course, I can see why Mach_y needs the extra power with such inefficient speakers.
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Old 28th April 2003, 06:47 PM   #4
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I would speculate that the most likely reason is that the Aleph 2 clones and discussion threads started first,
and this initiated quite a few projects... (thanks to the BrianGT PCB) Then transformer purchases for the 42V rails leads you down the Aleph 2 path.
Wouldn't you rather have 100W anyway?

Here are some other PCB design threads in case anyone is interested and doesn't want to use the search.

Aleph 3
Aleph 5
Aleph 60

I have seen the one board/channel, and the 3 board/channel implementations.
What I have not yet seen is a 2 board mono-block, like on the actual Volksamps.
Putting the Active Current Source components on one board,
and the differential input and the output components one another board
would be a clean design, with only a few wires between them.

I used the 3 board approach... and the chassis does get full!
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Old 28th April 2003, 08:10 PM   #5
labjr is offline labjr  United States
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After some reading and studying, I may try to build an Aleph 30, and see how that comes out, learn a little, before trying to tackle an Aleph 2 or X.

Looks like the hardest part of building an amp is finding heatsinks and the mechanical assembly of the hardware.
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Old 28th April 2003, 09:12 PM   #6
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Default ellis audio

I would suggest about 18V rails and 2.5 amps on an Aleph X. With this you stay in the sub-monster range (ease of construction and $$ is the issue)
Any time you want to really crank the volume, switch to an ordinary 100-120 w/ch amp.
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Old 28th April 2003, 09:50 PM   #7
labjr is offline labjr  United States
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How much power is the Aleph X with the 18 volt rails? I'm not sure there is a firm circuit design out there for the "X". or is there?

I'm sure the improvement that the "X" driver circuit provdes would be nice even in a lower powered amp.
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Old 28th April 2003, 10:40 PM   #8
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Default Re: ellis audio

Quote:
Originally posted by colwaiting
I would suggest about 18V rails and 2.5 amps on an Aleph X. With this you stay in the sub-monster range (ease of construction and $$ is the issue)
Any time you want to really crank the volume, switch to an ordinary 100-120 w/ch amp.
Due to space / money concerns (not currently having a 100-120 w/ch amp), I can only do one amp. The Aleph X looks interesting, but can it produce 100-120 watts? Also, is anyone making a PCB for the Aleph X at that power? Since this is my first solid state amplifier project (done tubes, but much fewer parts in those), I don't want to attempt P2P wiring.

Assuming there isn't an Aleph X board at that power, do I go Aleph 2 then? The Aleph 60 or 30 do not offer enough power for my application.
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Old 28th April 2003, 11:25 PM   #9
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Do not forget as well Aleph 4 that has 100W per channel as well and it can be done in monoblock version. Here is the link of the Aleph boards nicely done.

Kristijan's boards

Hope this help
Trigon
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Old 29th April 2003, 12:29 AM   #10
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Quote:
Originally posted by trigon
Do not forget as well Aleph 4 that has 100W per channel as well and it can be done in monoblock version. Here is the link of the Aleph boards nicely done.

Kristijan's boards

Hope this help
Trigon
I had planned on buying boards from him. They look very nice. Can anyone comment on the differences between the Aleph 2 and Aleph 4? Thanks!
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