^More power.
Parallel allows twice as much current, which is useful if you want to go loud with low impeadance speakers.
Bridge (series) allows twice as much voltage, which is useful if you want to go loud with high impeadance speakers.
Parallel allows twice as much current, which is useful if you want to go loud with low impeadance speakers.
Bridge (series) allows twice as much voltage, which is useful if you want to go loud with high impeadance speakers.
Or: remember that ACA is a beginner's introduction to DIY power amplifier construction.
Want more voltage? Want more current? Want more power? Build a different amplifier! Have all this fun, a second time.
Want more voltage? Want more current? Want more power? Build a different amplifier! Have all this fun, a second time.
Lol exactly.. Want the good stuff? Buy from papa Nelson support his pensiun fund.
It sounded very much like a single ended tube for easy listening. I'm using it as a living room phono music... It's supposed to sound like that.. No need to make it more complicated than it should.
It sounded very much like a single ended tube for easy listening. I'm using it as a living room phono music... It's supposed to sound like that.. No need to make it more complicated than it should.
considering we’re talking about ACA’s basic configuration variations, I don’t quite see how could you make it complicated at all. ... it’s all there.
Just don‘t confound „amplifier“ and „channel“...
Thanks Mark, my question wasn't entirely innocent, it doesn't bring any SQ benefit, that was my deep feeling ....and the reason why I made an F5.🙂
Aternatively build a more sensitive speaker and enjoy the benefits of a simple amplifier driving a simple speaker -I believe less is more for some of us 🙂
Full range drivers with no crossover sound great on the ACA
+1...I have a pair of Moth Audio Cicadas that work extremely well with my single, stereo ACA.
I run a pair of Zu Omen Dirty Weekends from balanced ACA monoblocks. Love it.
single gain stage, transconductance better than any tube, better than the 6c33...
this ACA can be scaled up...
i am building a 48v ACA which i will bridge....
Try building them with full carbon resistors. I used takman. Crc supply.
I had friends that come over and humming to the music, dancing along. It's the cheapest amp project yet for me and one of the most satisfying.
I had friends that come over and humming to the music, dancing along. It's the cheapest amp project yet for me and one of the most satisfying.
That board design lends itself well to the modifications that I like for the ACA.
Last edited by a moderator:
Are you sure that isn't the filter cap which makes this noise when first powering up using the wall wart PSU from the kit?
TADS - They all do that sir. The off the shelf complete ACA kit with DIY audio supplied power brick does that from day 1 it's not an issue. But it does stop once you build a second one and run them in bridge mode.
I missed the latest R changes but love the results of the input/feedback and cap mods. Many thanks for sharing your results.
all of our 70 board build never had this issues, we used a different type of power brick..
https://www.lazada.com.ph/products/...4l.searchlist.list.23.a18632dcAAFR1y&search=1
https://www.lazada.com.ph/products/...4l.searchlist.list.23.a18632dcAAFR1y&search=1
The latest R change of r5 and r6 which value 100 change to 121 , what is the purpose of this change?