First there was this: LINK Which led to this: VIDEO So I thought I'd try to make one. Attached is the schematic as given on the site associated with video. I drew it in LTSpice, also attached. Op Amps were substituted from original based on the TI crossreference recommendation, and availability from DIGIKEY. I hope these are suitable. Also attached is the .SUB files for the Op amps. If you need to know how to use them, which I didn't either, look HERE. Big thanks to RonH. And a link to DATASHEET. I am looking for any comments on, component selection, basic circuit, improvements, or even the drawing or simulation. I haven't worked with audio, or Op Amps much and thought this might be a fun little project. End use probably hooked to an MP3 player or I-Pod in tandem (parallel) with an amplifier driving some speakers. Thanks for looking.