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Class D Switching Power Amplifiers and Power D/A conversion

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Old 5th December 2012, 03:35 AM   #1321
6sigma is offline 6sigma  United States
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Lepai LP-2020A+ and Dayton B652 speakers from Parts Express are now connected to a laptop with 480 CD's worth of FLAC files. Modest expectations for this near-field setup have been far exceeded by the sound. No mods were done. Just plugged them together and started listening to music. Enjoyable.
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Old 5th December 2012, 06:26 AM   #1322
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Hey guys,
I got a the amp from amazon and I am really loving it but going higher up it start to distort the sound. I got a friend that can get hold of electrical goodies, capacitors, chokes, ect. He offered to get me better capacitors and anything else I would need and replace them for me. He asked me to get a list of things that I would need to he could order them.

I did read the stuff of page 60 but that is for an older model. What changes would you suggest to battle the distortion and just to have higher quality sound all together?

Thank you Click the image to open in full size.
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Old 5th December 2012, 03:29 PM   #1323
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Hey guys,

I got the capacitors and now just need to buy the Inductors. Should I get 4 or 5?
Click the image to open in full size.

And what's the best inductors that I could buy??? I don't mind spending a bit on them.

Thanks

Last edited by Mariusmssj; 5th December 2012 at 03:38 PM.
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Old 5th December 2012, 06:42 PM   #1324
pkozul is offline pkozul  Australia
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Default Choke coil for class-D amplifiers 10uH 3A

These are the best inductors I've come across... others may have better options...

4 pcs Choke coil for class-D amplifiers 10uH 3A | eBay
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Old 6th December 2012, 01:55 AM   #1325
AC439 is offline AC439  United States
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Quote:
Originally Posted by Mariusmssj View Post
Hey guys,
I got a the amp from amazon and I am really loving it but going higher up it start to distort the sound.
I also bought one from Amazon for a friend of mine. It came with a small power adapter. This should be the first thing to consider changing out. The small power adapter will not be sufficient to provide power for higher volume.
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Old 6th December 2012, 06:05 AM   #1326
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Is he getting a lot of static as well? I mean even with volume down my speakers are macking high pitched noise which seems to be coming from my pc. When I unplug the 3.5 audio jack from my sound card it stops. If i plug it in ty phone it does not have that noise.

Playing games it just goes crazy, i think it'smy sound card picking up stuff from my graphics card

I bough this cable, hope it helps.
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Old 6th December 2012, 09:00 AM   #1327
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Quote:
Originally Posted by pkozul View Post
These are the best inductors I've come across... others may have better options...

4 pcs Choke coil for class-D amplifiers 10uH 3A | eBay
Well this says it will take 4 weeks to get here

Do you think these(BOURNS INDUCTOR, RADIAL, 10UH 10%, 3A) would be any good?
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Old 6th December 2012, 02:02 PM   #1328
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I used Wurth 10uH inductors rated at 4.7A, part number 7447452100. Can be had from Digikey, Mouser, Farnell, and others, about $2 each.

Something I didn't know but have since learned, is that the dot on the inductor should go on the chip side (input side) to reduce EMI.
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Old 7th December 2012, 06:05 PM   #1329
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Quote:
Originally Posted by Redshift187 View Post
I used Wurth 10uH inductors rated at 4.7A, part number 7447452100. Can be had from Digikey, Mouser, Farnell, and others, about $2 each.

Something I didn't know but have since learned, is that the dot on the inductor should go on the chip side (input side) to reduce EMI.
Those are surface mounted but sure how would I get them on.

Does it matter if it's 4A instead of 3A for these inductors ?
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Old 7th December 2012, 08:32 PM   #1330
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Originally Posted by Mariusmssj View Post
Those are surface mounted but sure how would I get them on.

Does it matter if it's 4A instead of 3A for these inductors ?
No they aren't surface mount, they are 5mm lead spacing, an exact fit to what's there. They are cheap and decent quality and able to be had quickly almost anywhere.
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