Awesome, @KevinHeem! I appreciate this so much and will be working on setting my setup soon. Very cool.
Gentlemen, I have slightly peculiar question (in the context of this thread). Some time ago I decided to activate the various speakers I own. Until now I have always used the same amps for each frequency band.
Having purchased an ACA mini lately (great amp btw.) - I was being told by a more knowledgable person - that the currently used output caps only need to be that "big" in terms of value, so that even low frequencies are covered.
That suggests to me that if - like in one of my system - I only want to use the amp from above just under 1000hz - those output caps could be smaller (and thus different brands could be tried (out of curiosity).
But which value would be appropriate for such a scenario? And how about running the amp from 500hz upwards?
I understand those values can be mathematically determined - well, but not by me.....😉.
Anyway, any feedback will be greatly appreciated - thx.
Having purchased an ACA mini lately (great amp btw.) - I was being told by a more knowledgable person - that the currently used output caps only need to be that "big" in terms of value, so that even low frequencies are covered.
That suggests to me that if - like in one of my system - I only want to use the amp from above just under 1000hz - those output caps could be smaller (and thus different brands could be tried (out of curiosity).
But which value would be appropriate for such a scenario? And how about running the amp from 500hz upwards?
I understand those values can be mathematically determined - well, but not by me.....😉.
Anyway, any feedback will be greatly appreciated - thx.
Hi Nelson - thx. for the quick response - it's greatly appreciated. And the value of C3 remains, correct?
Maybe you allready answered this but how much power does your Lipo supply deliver? You can buy them in many different versions...
thanks,
Leo
thanks,
Leo
I use both 2800 and 3300 mAh packs and they provide between 50-90C, far more than is necessary for ACA mini.
I only run the lipo down to 22.2 volts, which is about an hour and fifteen minutes on each pack. I use a parallel board to charge four at a time.
Many people on the have expressed grave concerns about me doing this. I’ve been using lipos for 20 years, and Ive had one problem and that was self induced many years ago. Just use common sense.
Many people on the have expressed grave concerns about me doing this. I’ve been using lipos for 20 years, and Ive had one problem and that was self induced many years ago. Just use common sense.
Its of course the ultimate way to supply the amp with the absolute cleanest possible power.
But it is somewhat a little bit more of hassle that way to keep the music up and running the long run.
Next step is to add solar - with linear charging management, not switching regulation.
And then you are good to go rockin all day long, as long as the sun shines 🎷🙂☀️🎸
But it is somewhat a little bit more of hassle that way to keep the music up and running the long run.
Next step is to add solar - with linear charging management, not switching regulation.
And then you are good to go rockin all day long, as long as the sun shines 🎷🙂☀️🎸
There’s a top to bottom improvement with a lipo in the form of a wider soundstage, noticeable increase in space between elements, noticeably natural tonality and the low end is powerful sounding for ~5 watt amp. I’m mean really powerful.
I just have a couple of parallel boards and charge four batteries at once. Easy and well worth it to the point that it’s a perfect summer amp.
When I listen to this amp with the battery I don’t miss any of my full-size FW / PASS designs.
I just have a couple of parallel boards and charge four batteries at once. Easy and well worth it to the point that it’s a perfect summer amp.
When I listen to this amp with the battery I don’t miss any of my full-size FW / PASS designs.
How would that then be with some Super Capacitors - like 4F - that have incredible low Ri?
Has anyone done that?
How many do you need in series to reach 24VDC?
And then of course the capacitance drops down proportionally.
Simpler to buy a 24V brick me thinks.
And then of course the capacitance drops down proportionally.
Simpler to buy a 24V brick me thinks.
A SMPS brick with a constant current start-up is great with large capacitance, and while the SMPS is stable, it is maybe better to remove it with an L-C filter from the amplifier. So after the (small?) choke have a electrolite and why not, a supercapa?
They come pre-mounted in voltages > 24V. A 13 (thirteen!) Farad set @ 27V and a ESR of <<0.1Ω is € 31. Responsive to low frequencies I hope. My worry: the influence of the balancing hardware. A 1F version is more suited I think though . . .
They come pre-mounted in voltages > 24V. A 13 (thirteen!) Farad set @ 27V and a ESR of <<0.1Ω is € 31. Responsive to low frequencies I hope. My worry: the influence of the balancing hardware. A 1F version is more suited I think though . . .
Are you talking about this, or something similar:
https://www.ebay.com/itm/393430203986
Looks dodgy to me but who am I to judge.
https://www.ebay.com/itm/393430203986
Looks dodgy to me but who am I to judge.
Just a single 6s (pouch pack) lipo is all you need. You don’t need to worry about the 25 volts at 100% charge. It all can take it and I’ve got hundreds of hours on mine now.
No way I could go back…
I plan to try this on one of the full size, single rail designs.