Before I start,
WARNING!: make sure you stack the TDA1543 ontop of the CS8412 in the correct orientation. I sppent ages building a dac only to put the 1543 on back to front and fry the whole shebang. Pin 1 is the one nearest the notched end of the 1543, and should connect to pin 12 of the 8412.
Right then. The newest addition to the family is setup as before, with the following unique features:
Four 30mm foamed butyl rubber feet, so it can sit directly on the shelf of my rack.
75R Welwyn RC55 on each digital output pin
The loop filter is a 499R Welwyn RC55 followed by a 4.7uf Y5V 1206 ceramic.
Good old Sanyo 220uf OSCON G-type for coupling cap. The difference is that I've peeled them, which some say makes for a more natural sound.
The TDA1543 is bypassed with the quadruplet discussed previously.
Each LM78XX is bypassed with a Rubycon ZA 10uf 35v on the input, and a 100nf X7R 0612 ceramic on the output.
This cap combo is also sued to bypass the Rubycon ZL 3300uf 16v that provides local filtering.
I'm slumming it with Welwyn RC55 I/V resistors, as I've buggered the Audio Note tantalums. I'm using Peter Daniel's recommended 3k0 value, rather than the 2k3 value theory calculates for an 8v supply.
It's hardly had any run-in yet so the treble sounds like sand and glass, but it's the best "from cold" sound I've heard yet. Ultra dynamic, the tom toms and kick drum on Morphine's excellent
Cure for Pain feel like I'm going to poo my pants!
Subject to some minor revisions, I think this is the one.
Woo!