which pass amp for ellis audio 1801b's?

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Dane

Dane

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Joined 2002
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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!
 
L

labjr

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Joined 2003
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.
 
M

Mach_Y

Member
Joined 2001
Re: ellis audio

colwaiting said:
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.
Click to expand...

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.
 
colwaiting

colwaiting

Member
Joined 2002
No, it's not firm, but that is part of the fun?!
Rough guess, 35-40W.
One thing about the "X" is that it is good for an eight-ohmer, because with the bridging topology, It can get the voltage without needing excessive class A amperage. ( perhaps I'm forgetting that excessive goes together with much about pass amps...)
 
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labjr

Member
Joined 2003
No, it's not firm, but that is part of the fun?!

I could probably make tweaks to the Aleph-2 or 30 circuits. Power supply changes etc.. but I'm not sure I would like to burn up a pile of FETs every night, experimenting with circuit topologies.

I wonder if the existing "X" circuits sound better than the other Aleph circuits yet.

It can get the voltage without needing excessive class A amperage.

Does this mean better sound with smaller heat sinks for a given power output than other Aleph amps?
 
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