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Powering this dac using phone charger sounds kind of dirty and the harshness hurts my ears, I've tested Power Bank and it's really clean as they say, but the quality is kind of claustrophobic and very poor in bass, the same I've read in reviews about IFI Power Supply and IFI X (and the same for the USB filter IFI Silencer+), now I'm plugging directly into the notebook (The USB Data and Power cable), I've clearly noticed that the sound quality of the E30 is better than the above options, sounding good soundstage, clean, accurate without any audible noise or distortion, I would say it's a comfortable sound, BUT I sometimes feel a pain in my ear, like a ''needling'', it bothers me a LOT! Believe it's some kind of noise or interference from the USB ports. Could anyone recommend a good Power Supply Linear that is good in the bass and brings superior to what I mentioned?

My Allo Volt +D recently arrived, I tested it and I was surprised with the quality, well detailed and transparent, not harsh, I'm very satisfied, but I noticed that the sound is a bit ''cold'' and tiring, lack of warmth, a bit bright too, more than that I expected, I've read that in all reviews that the sound is neutral, what can be the weakness of my setup? I don't believe it is a defect in something, My Setup: Speakers: Pioneer SB22-LR (neutral to warm sound signature) Connected to the amp by thick, shielded, decent quality cables. DAC: Toppingo E30 (neutral to warm sound signature) Powered with a phone charger and connected to the PC with an Audioquest Forest USB cable) Connected to the amp with shielded and good quality RCA cable, everything updated, including the driver. AMP: Allo Volt+D - powered with ''Allo'' 19v brick power supply)