![]() I'm still undecided about the output stage - has anyone used this IC that could weigh in? It will be driving a short interconnect in my stereo rack, not a long line or anything. ![]() The basic signal path has inputs selected through some inexpensive telecoms relays by Panasonic (TQ2 series), buffered by an OPA2132 in unity gain, and then through the PGA2311. Also a bit of a teaser in case anyone is interested in helping with the prototyping process as I'm not confident I can fab these PCBs myself, and in small quantities they'll be pricey. I don't intend this for headphone use, but people around here have far more knowledge than me on the analog side of the electronics, so I'm going to throw this out there. ![]() The plan is to make the design as flexible and exposed as possible so it'd be easy to do nutty stuff like tack and I2C temperature sensor inside the power amps and display it on the LCD or even mute/attenuate the output if the amps overheat. I'm now getting my feet soaked designing a full-on preamp around the chip, complete with digital source selection, display, remote control and pretty much anything else you could dream up. So I sampled a few of these interesting BB ICs ages ago with the intention of building one into my CK2III build, but that never happened so I decided to get a little more ambitious.
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