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$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
cdc OP
1,826 posts
 

In your case that's 24 volts and 4.5 amps.

That is a good point.

cdc OP
1,826 posts
 
Put a thin  plate of shungite with a copper tape  on the Fosi
 
There are five types of shungite rocks, categorized by their carbon content:
  • Shungite-1 (noble elite shungite): 90%-98% carbon; this has the metallic sheen.
  • Shungite-2 (raw shungite): 35%-80% carbon.
  • Shungite-3: 20%-35% carbon.
  • Shungite-4: 10%-20% carbon.
  • Shungite-5: Less than 10% carbon.
akg_ca's avatar
akg_ca
2,307 posts
 

Hmmm …. Spending $100 to $200 extra on an external linear power supply for a cheap $80 MSRP FOSI mini integrated amp, (per the FOSI website page) ?

Everything in this crazy hobby is built to its price-point…., full stop.

That annoying digital “glare”, or digital “edge”, or “brittleness” is a direct function of the minimalist build quality of the amp’s components themselves, that isn’t going to be magically eliminated. 

.I don’t see the merit in an approach of a new LPS at equal to or double the MSRP price of the amp unit itself. I’d put the $200 toward the cost of a better amp first.

carry on and choose wisely, sir.

jasonbourne71's avatar
jasonbourne71
1,248 posts
 

@akg_ca +1 A voice of sanity!

bolong
651 posts
 

My favorite trick for treble glare - 4 6mm girasol opal beads tied together with flexible beading cord and slipped over the speaker cables about 3-4 inches from the speaker terminals - adjustment to taste. This in essence is a cable "choke" but much more refined than the ferrite versions. The result is a sound very much like that of tubes. Four beads fit over my 16 gauge "western electric" cloth cables. Larger diameter cables require more beads for making the "ring."

This is not technically "opal" but is called that because of the way it handles light. The beads below are 8mm diameter, and it is sometimes hard to find them in the smaller sizes. 8mm diameters will work for larger diameter cable or even the thinner gauges - it is just more difficult to make the "ring" of beads to encircle the cable with some spatial uniformity.

Girasol Opal Beads

.7mm Elastic Beading Cord

 

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