Don't use #1.
With #2, confirm whether the HPA connects the two (-) power leads together on the board.
Can you post the schematic of the HPA? Also, do your headphones have a common ground?
With #2, confirm whether the HPA connects the two (-) power leads together on the board.
Can you post the schematic of the HPA? Also, do your headphones have a common ground?
The problem with first schematic is you have to isolate both supply(after rectification) from each other, otherwise it'll explode! Diagram two has no such problem, just connect both ground(-) at the end.
Yes, if possible delete the diagram #1 from your first post, so no one tries to build that.
Then you will never need anythig more than this and you can ignore L1... Basically most headphones on the planet will never need different power sources for each channel simply due to the common groud connection found in almost any commercial headphones model and the low damping factor needed.Nait or Naim Superunity is using one single transformer and two batteries of capacitors for each channel of the 2 x 80 watts amps driving hybrid Martin Logan elecrostatic speakers while employing very high speed output power transistors(100watts, 60 Mhz FT) and has no problem with that. https://www.naimaudio.com/product/supernait-3
We can pretend that headphones can be treated as a heavyweight loads, but you don't really need John Brzenk muscles to lift about 100 of them with one arm. There are hudreds of completely exagerated designs pretendig to be the best and only way for driving headphoes that can actually be driven by 50 square mm 500mW op-amps to their absolute best...
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I prefer bridge rectifier solution instead of full wave rectification using two diode, although theoretically there is no difference.
True, i forgot. But overall efficiency is better with bridge rectifier. Although that doesn't matter here because he already using regulators. Can use LDO if he wants to.
By efficiency i meant better utilisation of the transformer. With a 24v CT & bridge rectifier you get 32v rectified but with 2 diode method you only get 17vDC. Also i had seen that using two diode method transformer heats up drastically compared to bridge.
A good thread on this topic.
https://www.diyaudio.com/community/threads/full-wave-vs-full-wave-bridge-rectifier.49327/page-2
https://www.diyaudio.com/community/threads/full-wave-vs-full-wave-bridge-rectifier.49327/page-2