Here's a block diagram of what I have. I tried powering the Arylic from a battery to try an avoid ground loop and it fixed the problem, so it's either a ground loop or a poor quality buck convertor - I suspect the latter. Will try some smoothing on the +5V to see if it fixes it. Thanks for your help.
But what you really want is a LT3045 based regulator. But you cant feed that 48V. And you can't set one after an USB block because it needs say 6V to work properly. If you have ambition with this setup you really ned to get a proper power supply for the streamer. But one can't hope for all that much with a complete receiver, controller and DAC for 49 bucks... 
The amp seems really good and in an other league than the Acrylic board. Maybe not the most balanced combo perhaps...
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The amp seems really good and in an other league than the Acrylic board. Maybe not the most balanced combo perhaps...//
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@3eaudio, some class d amps seem to run out of steam when used for subs generating amplifying infasonic (down to 10Hz) how is the performace at this range, as I have not seem many charts. Is there a power drop? and if it is, how much is pex[-ected to drop (in percentage or watts) . Thanks
@phreepie Perhaps try with a 5v psu also connected from mains to power the dac. I'm building a setup that does something similar so I can let you know how that works in a few weeks or so but I'm running a raspberry pi and khadas dac so I'm not sure how results will translate to your setup
Got a pair of the monoblocks delivered. Nice things. I was an early adopter of the 3e stereo amp a good few years ago. Ended up selling it on whilst I played with other topologies. Eventually got back into a 3255 with the JLE amps and currently listen to Lester's Sylph200. I've built a few class A amps but I seem to return back to these!
I'm planning biamping and active XOs on my DIY 3 ways and the plan is these monoblocks on the LF and a 25 watt class A for the tops and mids( passive between these two).
Hopefully all in one chassis, so a channel amp all in one.
I currently use this Meishile PSU 48v 600w
https://a.aliexpress.com/_EzexYPl
with the Lester amp and so I bought another to power each monoblocks with one. They seem very quiet, though the speakers and from a PWM point of view, and also run very cool. I take the lid off and fan out.
I'm planning biamping and active XOs on my DIY 3 ways and the plan is these monoblocks on the LF and a 25 watt class A for the tops and mids( passive between these two).
Hopefully all in one chassis, so a channel amp all in one.
I currently use this Meishile PSU 48v 600w
https://a.aliexpress.com/_EzexYPl
with the Lester amp and so I bought another to power each monoblocks with one. They seem very quiet, though the speakers and from a PWM point of view, and also run very cool. I take the lid off and fan out.
