I opened up my SRD-4 out of curiosity & found a very simple circuit: a pair of big ceramic caps (Murata  P T H     BD4R7M) and a pair of fairly rude looking wirewound ceramic resistors (5W 27ohm.)  Does anybody know what value the Murata has?  I'm thinking the ease of upgrade would be quick fun...

I am interested in the development of an integrated DAC/PC using a NUCcomputer.  I think the future is in small digitally integrated systems with RAID 0 or 10 storage (picture a NUC on top of some ministackers and a Balanced B1 pre driving additional remote audio.)  Control w/ a mini tablet. ...