Go Back   Home > Forums > Blogs > panson_hk
Reload this Page LME49810 300 W amp kit from TaoBao (Mods)

Rate this Entry

LME49810 300 W amp kit from TaoBao (Mods)

Posted 23rd September 2011 at 07:19 AM by panson_hk
The THD performance of this board can be improved by separate the input/NFB ground from the decoupling grounds. This is a common mistake in many kits.

Simply cut the trace as shown in the figure and connect the input/NFB ground to supply ground via a separate wire. THD improves as shown in the figure.
Attached Thumbnails
Click image for larger version Name: IMGP3497.jpg Views: 1559 Size: 124.1 KB ID: 489   Click image for larger version Name: THD vs power 1k 20k 20Hz 8Ohm 23 Sep 2011.jpg Views: 1309 Size: 141.9 KB ID: 490   Click image for larger version Name: THD vs power 1k 20k 20Hz 8Ohm Ground isolated.jpg Views: 1136 Size: 145.4 KB ID: 491  
Posted in Uncategorized
Views 4777 Comments 1
« LME49810 300 W amp kit from TaoBao (Test)     Main     New system hard disk »
Total Comments 1

Comments

  1. Old Comment
    HoneyBadger's Avatar
    Can you comment on the quality of this amp? Also, why did you add the capacitor?

    Apologies for bumping an old thread.
    permalink
    Posted 3rd January 2014 at 07:10 PM by HoneyBadger HoneyBadger is offline
 

New To Site? Need Help?
Copyright ©1999-2017 diyAudio