Nobody interested? Or is this old news?
-I was just going to say that I have buildt the circuit, and I can only say that it works beyond my wildest expectations
All that, and it is only buildt as a proof of concept-rig with less than optimal components, layout etc. Next week I'll have my finished version up and running, with much better components, wiring, connectors, dual-mono etc. Sad to say really, but it demolishes my aleph30 clone..
BTW, my reason for having balanced input is that I already have a Pass BZLS, that I'm very fond of and I think it's simply MAGIC (-everything it connects to turns to "Aural Gold") . Much better sounding than standard gainclone methinks, but that depends on individual systems i suppose..
This version has lower gain; 20dB (versus 27dB for the original), and a little higher input impedance 22Kohm per phase (or 44Kohm balanced) to make it a better match with my pre. Oh, I forgot to mention -the use of a smd resistor for the feedback is highly recommended. It fits really nice on the opa549
I'll report back with some pictures and listening impression after the final version is done.
BR,