I need a more powerful amplifier to drive my Dayton 15" IB's in open baffle.
They are currently powered by an Arcam Alpha 8p.
X-over that will drive the amp is a DCX2496.
The transformer I have was custom ordered for a TDA2022 BTL build.
Unfortunately the board/design seem to have been flawed as me and others got a hum on one channel that would not go away.
So any suggestions about power amps that'll run 8 ohms at 100W or more (and not at the high THD often used when listing power output in ebay listings) is appreciated.
They are currently powered by an Arcam Alpha 8p.
X-over that will drive the amp is a DCX2496.
The transformer I have was custom ordered for a TDA2022 BTL build.
Unfortunately the board/design seem to have been flawed as me and others got a hum on one channel that would not go away.
So any suggestions about power amps that'll run 8 ohms at 100W or more (and not at the high THD often used when listing power output in ebay listings) is appreciated.
Any class d amplifier will give approximate the same output when the transformer is given.
If you can find a design specially for subwoofer (low oscillationfrequency) then the amp can be even more efficient - maybe 95% instead of typical 90%
If you can find a design specially for subwoofer (low oscillationfrequency) then the amp can be even more efficient - maybe 95% instead of typical 90%
Assuming your load impedance is 8 Ohms you wont get 100W rms single ended whatever the amplifier style so you need bridge mode unless you dump the transformer and use a higher supply voltage.
Thanks for your reply 🙂
I'm not very familiar with class D amps.
I've only built one ta2020 and one ta2022 (2x60W according to the ebay seller).
TA2022 in BTL will be fine. There is also a lot of IRS2092 based amps in any price range.
These are typically scalable and will work fine with a 2x22VAC transformer.
These are typically scalable and will work fine with a 2x22VAC transformer.
I got the transformer made for a ta2022 btl board. Never got it to work properly.
Since then I am cautious about ebay kits when it comes to class D.
I have no clue what kit from whom is any good.
I do have a few ta2022 IC's at home though.
LJM and Sure Electronics, should be just fine from ebay, parts express or aliexpress.
Constructor ljm you can find here on DIYaudio, and ask him relevant questions
Constructor ljm you can find here on DIYaudio, and ask him relevant questions
I'll have a look at that. I'll look at who designed my board when I get home. Writing from my phone atm.
Thanks 🙂
Found boards very similar to the one I have (not LJM).
Don't know if posting a pic would be ok.
The ta2022 are on the same pcb, already configured for btl. Blue rather big pcb.
From what I've read on this and other forums, I'm far from the only one that had one channel that had a hum.
I even sent the board back to the seller and got a new one, with the same issue.
You can use one of the TI chips (TAS56xx) in BTL-mode and use a separate supply (single secondary) per channel?
/U.
/U.
Plenty of information out there if you google e.g. TAS5611 and TAS5613. I don't recall ever hearing a TA2022, so no idea how they compare 🙂
/U.
/U.
Thanks, I didn't know the model numbers as you wrote them as TAS56xx in your previous post 🙂
Maybe you have heard Denon AVR-770SD. It uses TA2022. I remember it as very surprising when I heard back then. It sounded very good, but only within it's healthy power levels. Push hard, and it sounded awfull harsh.
I have a TA2022 in regular stereo mode driving the mids and highs of my dipoles.
It sounds quite nice.
It sounds quite nice.
I've ordered a second TA2022 PCB.
I don't recall if I need something like DRV134's to go from SE to Balanced?
It's however meant to power the 15" Dayton IB's in my dipoles and will be fed from a DCX2469 (handles dipole compensation and woofers, the mids, high have passive crossover).
Can I run two TA2022 boards in BTL straight from the DCX2496 via balanced cables?
I don't recall if I need something like DRV134's to go from SE to Balanced?
It's however meant to power the 15" Dayton IB's in my dipoles and will be fed from a DCX2469 (handles dipole compensation and woofers, the mids, high have passive crossover).
Can I run two TA2022 boards in BTL straight from the DCX2496 via balanced cables?
Hi 'Mayday'
in principle you can use two power amp channels with inverted inputs of the balanced connection. It should do the same common noise eliminating trick as a balanced receiver, but only if the gain of both channels is very well matched. This may be more difficult to achieve than with a balanced receiver chip.
The stereo/BTL single ta2022 boards like the one I have from ljm do have a simple jumper/restistor circuit which should be too hard to reverse-engineer to fit your needs.
Are you sure TA2022 BTL can handle the units you mention (should be >8 ohms).
Cheers and please tell us more about the speaker system you have.
I use the TA 2022 with very simple, but very to-my-taste mark audio single driver BR speakers.
Hi,
The board I have, and the board I've ordered both have marked BJT in and outputs.
So, it would be easier/better to use a drv134 based SE to balanced board?
The "balanced" outputs from the dcx2496 isn't true balanced outputs from what I've gathered.
I'd need to use off-board PS as the toroidal transformer I intend to use is a 0-22Vac + 0-22Vac 400VA, and the onboard rectifying wants a center tapped transformer per ta2022 board.
The amp will drive two Dayton 15" IB woofers(one per dipole).
The mids and highs are:
Dayton 7" Reference aluminium mid
B&G Neo 8 for highs.
Paśsive x-overs are built with Cross coils, PIO's and silver wire in PTFE tubing.
Writing from my phone so I don't have the info on the ta2022 board I have, or the one ordered.
- Status
- Not open for further replies.