Hmm, I'll have to look into that. Easy enough to leave it out and change global values...   Either way, almost ready to start soldering components. Gonna be interesting to see how many of these R and C values I actually have in the bin, it's surprisingly well stocked with certain things, and...

can't say I have any experience with this chip, but the datasheet gives no indication that you can circumvent the in-built rail splitter. wakibaki's spot on about reintroducing the (very possibly required) ac-coupling capacitors to allow the internal reference to work. Datasheet has a lot of...

Kester has always been the preferred brand in electronics shops I've worked at. Available at digikey, mouser, etc. I'm pretty partial to the no-clean stuff myself...(series 275 IIRC?)   EDIT: 245, and 63/37 - you're gonna pay a hefty premium for any silver bearing solders...just stay away...

Ok, how's this look for a start? According to the calculator on Tangent's page (thanks!) Even with R8/R9 = 1 I get gain of nearly two, on account of the local loop?    Also, only have NPNs in the bin, so went with a Widlar source - does that make sense? Set to sink 1.2mA from the...

Thanks DingoSmuggler, I think we're on the right path. I'm not intending to listen at any length at 115dB, but the amp should be able to handle it with the buffers.   jcx - you confused me pretty good there for a minute. I think I get what you're saying now, not to isolate headphone ground...

I get 39mA when I calculate for 115dB peaks (32ohm, 98dB/mW) - so yes, 45 is a bit high, but not 135dB high and I always think a little safety factor is useful? Still, we're looking at somewhere around 40, so buffering is in order...     Consensus (and specification) seems to indicate the...

Hi Folks,        Been searching/reading as much as possible but I'm quite new to audio amplifier circuits, though I do build electronics semi-regularly.       Have a CMoyBB (2227) and O2 on the way, but kinda like the idea of a parts-bin special. I've got the following chips in my parts...