Here are the results of the UrSv jury:
Option 2, 3 points.
Option 3, 2 points.
Option 1, 1 point.
The winner is Option 2. Why?:
Option 2 - Simple and easy to build with minimum HW costs. No real downside. One or as many as needed times 1 block at each speaker stack.
Option 3 - Lots of hardware but still able to split in 2 lots for placement as for Option 2 if desired.
Option 1 - Where on earth am I gonna put the PSU if I want to split the amps and place them near speakers and how long will not the cables be with a lot of current?
/UrSv
PedroPO or Mr Brewster? None of the above....
Option 2, 3 points.
Option 3, 2 points.
Option 1, 1 point.
The winner is Option 2. Why?:
Option 2 - Simple and easy to build with minimum HW costs. No real downside. One or as many as needed times 1 block at each speaker stack.
Option 3 - Lots of hardware but still able to split in 2 lots for placement as for Option 2 if desired.
Option 1 - Where on earth am I gonna put the PSU if I want to split the amps and place them near speakers and how long will not the cables be with a lot of current?
/UrSv
PedroPO or Mr Brewster? None of the above....
I am Leaning towards Option 1 at the moment, overall a bit more work but hardware costs are much less, 1 TX, 1 set of Caps vs building another chassis and adding power connectors, hummm.
If you use 14/4 CAB SJT or SJOW as the DC power cords they will not even get warm. 14 Gauge CAB can conduct 12 Amps easily and the Aelph rails are only going to be 5 or 6 Amps each. the 14/4 would likely carry +60/-60, common and a spare ground fused.
The benfit a noise free enviroment for the Semiconductors.
Is this not a worthy ambition?🙂
Anthony
If you use 14/4 CAB SJT or SJOW as the DC power cords they will not even get warm. 14 Gauge CAB can conduct 12 Amps easily and the Aelph rails are only going to be 5 or 6 Amps each. the 14/4 would likely carry +60/-60, common and a spare ground fused.
The benfit a noise free enviroment for the Semiconductors.
Is this not a worthy ambition?🙂
Anthony
With proper placing of transformers I think that noise will not be a problem. Just think of all the heatsinking giving you lots of room.
I prefer the shorter wires when currents are high.
A lot depends as usual on what hardware you have and the workshop you have...
/UrSv
I prefer the shorter wires when currents are high.
A lot depends as usual on what hardware you have and the workshop you have...
/UrSv
When you build high power class A amp, you obviously end up with big heat sinks. The natural progression from here is to use those heat sink as a housing for a big power supply. I don't see any point in keeping amps empty and building another chassis for power supply only. I'm also not that sure, about long power cables from PS to the amp. I think they might introduce more interference than properly placed transformer inside the amp. Another advantage of monoblocks is to use them close to the speakers which means spreading them apart. In that case you would have to run thick power cables across the room. Your wife might not like it.😉
Well that is an entirely different discussion. I am surprised though Peter I thought you implemented a seperate P/S for you A75's?
I was intending to use a seperate P/S for my Aelph preamp and probably still will, but maybe I will incorporate the P/S in the same Chassis as my Aelph 1.2's. Hummmmm
Anthony
You might have been under the impression that my A75 had separate PS, because those were two amps stacked on ea. other for a total of 4 monoblocks. I did never consider making an amp with separate PS, although Cello did.😉
Jadis had some mammoth multi-chassis amps, too. JA-200 was the designation, if memory serves me right.
Erik
Erik
hey everyone - nobody really answered my second question about several smaller caps better than a few big ones? peter - i thought i saw alot of smallish caps on one of your amps? what was your theory about all those caps? 🙂 also i was thinking of mounting the transformer on it's side! does anyone know if this is a good practice? i would think because of stray emmissions that this method would work the best sonically !! also it would be the best space saving !
hey - how would you mount it -
hey - how would you mount it -
Check my A5 in Pass Galery: http://www.passdiy.com/gallery/aleph5-p3.htm I just bolted transformer to the heatsink. I like to use smaller caps, not much theory behind it, just convenience, availability and possibility to mount them closer to output devices.😉
I find smaller capacitors are faster to react to line changes but do not offer the capacity to stabilise drastic changes in the line during high load conditions. Several time I have heard references to mixing capacitor values to get an optimum effect.
Me I go big and go bold. 🙂
Anthony
Me I go big and go bold. 🙂
Anthony
Here is a picture of the first chassis for my A1.2 the second identical tower should be built soon. Obviously it's got a way to go until it's finished. 🙂
Anthony
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Anthony
I know that this is a year late response to Peter, but the "fast" caps is a mute point with class A amps. The current demand is constantly running flat out. Transients are not like turning a long water hose on and off and getting a dribble instead, It's like a water hose flowing full tilt and being pointed at a target then away. But I'll still bypass with a film anyway.
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