$100-200 linear power supply


Trying to remove the digital glare from my Fosi Audio TDA7498E amp. Would changing to a linear power supply do the trick? Speakers are similar to Devore O/baby and Micr/O and listen at 70-80dB max.

Open to any suggestions. Would any of these be suitable?

 

25W 12V Regulated Linear Power Supply

I like this because it uses FRED’s but only 2 amps at 12VDC.

 

5A Output Regulated Voltage Linear Power Supply 50VA Transformer

 

Finished 50W Ultra-low Noise Linear Power Supply

cdc

I am of the school of thought that one would be better off buying a better amplifier than sticking 2 or 3 times the cost in a power supply. It’s an $80.00 amp.

From the same review:

 

What is less good are the spikes overlaying the waveform at the signal’s zero-crossing points, which imply inadequate standing bias current in the Gaincard’s output stage. When RD writes about "a hardness or glare in the upper midrange and treble," I do wonder if that correlates with the presence of the high-order harmonics that will result from this behavior. Of course, RD also found that this character dissipated after a very long break-in period.

 

Lab 4706 Gaincard, 1kHz waveform at 22W into 4 ohms (top), distortion and noise waveform with fundamental notched out

Lab 4706 Gaincard, 1kHz waveform at 22W into 4 ohms (top), distortion and noise waveform with fundamental notched out

@ericgale 

I am of the school of thought that one would be better off buying a better amplifier than sticking 2 or 3 times the cost in a power supply.

Sure, what amp would that be? It would help if you have heard this amp so you can know what type of sound I am talking about.

I'm using same amp to drive Avalon Ascendant, with WiiM Pro Plus...no "digital glare" here ...and it's down to $59.95 including shipping...