I would add those four electrolytic 47uF capacitors, but please could someone tell me what amount of voltage of those caps should be: 25, 50 or 63V? any other value? and they should be bipolar or normal?
I've found some audiophile nichicon muse caps with various amount of voltage to buy (25, 50 & 63V)
Or Tantal ROE-Vishay 47µF 10V or 16V.
And Tantal Nichicon 47µF/16V
I have been tinkering with the TDA1543 for about a week now, running 8 of them off the I2S output from my Teralink, I find there is a distinct benefit from using 8 devices rather than 4, I would suggest that for the DIR9001 based board (Muse Audio) that ya'll are using a possible mod would be to tack an additional 4 chips on top of the existing ones, this would involve removing the metal bracket sitting on top of them, I am uncertain if this acts as a heat sink, the devices do get a bit warm when running at 8V, I also second the notion of using more decoupling, adding a 47uF electrolytic or perhaps a tantalum (I have only tried with electrolytic) to the existing 100nF capacitors will definitely add improvement.
Edited by Heruka - 4/26/12 at 9:44am