2. amps-preamps
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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
mahgister's avatar
mahgister
13,098 posts
 

I will also use a linear power supply ...

but i will ad this :

Put a thin  plate of shungite with a copper tape  on the Fosi and/or  on the linear supply ... Add a piece of quartz if it compress the sound a bit too much...

it is my homemade creation...

I dont buy tweaks but make my own ... 😊

 

jackd
1,068 posts
 

If you don't buy the size LPS that is specified by the amp maker you are wasting money.  In your case that's 24 volts and 4.5 amps.  Only one of the three you linked met that standard. 

cdc OP
1,798 posts
 

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

That is a good point.

cdc OP
1,798 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
2,273 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.

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