not yet, but considering that 260 watts is total power draw, so 25% of that is 65 watts, so 30 to 35 watts is a reasonable expectation....
i am not done yet with this amp, i will try the irfp240 and others if only to see how the fare in this amp and challenge them with higher power dissipation...
btw, 4 x 200 watt 48vdc smps were used and was purchased here: https://shopee.ph/product/46314077/6112007764
i am not done yet with this amp, i will try the irfp240 and others if only to see how the fare in this amp and challenge them with higher power dissipation...
btw, 4 x 200 watt 48vdc smps were used and was purchased here: https://shopee.ph/product/46314077/6112007764
Last edited:
Fugly!
with IRFP150 you can go up to 50W of heat per piece, if cooled properly
which means - chassis no more than 50C at heatsinks
try arranging nice Babysitter, it helps a ton
Thanks
Just want to say thanks to Nelson and the folks at DIY Audio store and 6L6, and many other diyAudio regulars on this Labor Day
Been listening to an ACA all day with Klipsch RP-600Ms and an RSL sub crossed over at 200 hz.
Right now it's flooding down in Texas at about 93 db peak. No listening fatigue.
Total enjoyment.
I have built several amps (Burning Amp, Aleph J, F6. Built the F6 for a friend).
I have a second ACA on order. Going to go monoblock.
Note: passing the bass to the sub reduces the temp of the ACA amp significantly.
My advice is to drink some beer and listen to some music instead of fretting over the DBs all the time. These amps sound damn good.
P.S. I don't think it's the beer goggles.
Just want to say thanks to Nelson and the folks at DIY Audio store and 6L6, and many other diyAudio regulars on this Labor Day
Been listening to an ACA all day with Klipsch RP-600Ms and an RSL sub crossed over at 200 hz.
Right now it's flooding down in Texas at about 93 db peak. No listening fatigue.
Total enjoyment.
I have built several amps (Burning Amp, Aleph J, F6. Built the F6 for a friend).
I have a second ACA on order. Going to go monoblock.
Note: passing the bass to the sub reduces the temp of the ACA amp significantly.
My advice is to drink some beer and listen to some music instead of fretting over the DBs all the time. These amps sound damn good.
P.S. I don't think it's the beer goggles.
Working From Home
I've been on immune suppressing drugs for a couple of decades so staying away from people as much as possible. Music is good though. ACA's with home built power supplies and Korg Nutube pre-amp with home built power supply. Home built (but professionally sprayed) Carfrae Horn Replicas (Creation Audio Kit) 106db horns go down to approx 50hz with plate amp driving 10" subwoofer passive radiator combo in each to go down to 20hz. ACA barely using 0.7 watt at normal listening levels. Nativ streamer is bricked at the moment and zero customer support
looking at high end replacements. Fancy a Cambridge edge NQ (can by pass pre-amp if required). Pearl phono pre-amp needs starting just a case and boards so far.
I've been on immune suppressing drugs for a couple of decades so staying away from people as much as possible. Music is good though. ACA's with home built power supplies and Korg Nutube pre-amp with home built power supply. Home built (but professionally sprayed) Carfrae Horn Replicas (Creation Audio Kit) 106db horns go down to approx 50hz with plate amp driving 10" subwoofer passive radiator combo in each to go down to 20hz. ACA barely using 0.7 watt at normal listening levels. Nativ streamer is bricked at the moment and zero customer support
looking at high end replacements. Fancy a Cambridge edge NQ (can by pass pre-amp if required). Pearl phono pre-amp needs starting just a case and boards so far.
It seem the diff is just on the back panel. (See post #834
https://www.diyaudio.com/forums/the...mp-camp-amp-kit-1-6-1-8-a-84.html#post6329972 )
Also, an upgrade kit is being considered. (See post #8969
https://www.diyaudio.com/forums/pass-labs/215392-amp-camp-amp-aca-897.html#post6331659 )
https://www.diyaudio.com/forums/the...mp-camp-amp-kit-1-6-1-8-a-84.html#post6329972 )
Also, an upgrade kit is being considered. (See post #8969
https://www.diyaudio.com/forums/pass-labs/215392-amp-camp-amp-aca-897.html#post6331659 )
Yes it will be compatible. There is No difference in the circuit or the board.
1- Differences are the rear panel. Not really important.
2- The two position switch of the V1.6 is replaced with a 3 position switch in V1.8. V1.8 switch adds 'parallel mode' as well.
3- R13 was 10K ohms on V1.6 and is now 31K in V1.8. That just makes the LEDs dimmer.
Depending on what 'mono' configuration you want to use you can either build the V1.8 as a V1.6 or replace the two position switch in your current amp with a 3 position (on-off-on) like the guide: Amp Camp Amp V1.8 Build Guide - diyAudio Guides
The new 3 way switch modes:
Last edited:
I have one complete v1.6 ACA and two populated PCBs for a second ACA. If I order another chassis, is there a BOM for the extra parts needed to finish the amp? (binding posts, front power switch, RCA jacks, etc.)
P.S. I looked on diyaudiostore.com on the ACA chassis page, but didn't see anything. perhaps that would be a good place to post a list or a link to a list.
P.S. I looked on diyaudiostore.com on the ACA chassis page, but didn't see anything. perhaps that would be a good place to post a list or a link to a list.
Last edited:
A little off topic.
I am interested in a steel chassis but made with 2 mm or 3 mm steel panels.
Are you able to cut and fold steel that thick?
Hi,
not so long ago I put together a pair of ACA’s as monoblocks and they are feeding a pair of BMR drivers set in 30cm diameter plaster spheres that I also made a couple of years ago. I’m really enjoying the sound but I’d like just few more watts, as the BMR’s are not very efficient, so I’d like to go up to 24v as I have acquired a pair of 24v linear supplies and a Meanwell 24v 8 amp, SMPS to try out. I have version 1.B of the ACA so can someone confirm what modification I need to carry out to achieve this. I know I’ll have to re set the midpoint voltage to 12.5v approx.
Many thanks
not so long ago I put together a pair of ACA’s as monoblocks and they are feeding a pair of BMR drivers set in 30cm diameter plaster spheres that I also made a couple of years ago. I’m really enjoying the sound but I’d like just few more watts, as the BMR’s are not very efficient, so I’d like to go up to 24v as I have acquired a pair of 24v linear supplies and a Meanwell 24v 8 amp, SMPS to try out. I have version 1.B of the ACA so can someone confirm what modification I need to carry out to achieve this. I know I’ll have to re set the midpoint voltage to 12.5v approx.
Many thanks