Dumb question but help me out here, building a 75 ohm impedance adapter would require running a resister in line on both the left and right channels? Or does the resister connect the left and right channels?

I was in Radio Shack the other day and saw these Jabra ear gels, these are made for the Jabra cell phone ear pieces. I bought a package to try out on my PK3 to see if they will channel the sound better like the custom mode available from the retailer in New York (forgot the name). I like...

Currently building another op amp version of the CMOY (2227) and I'm running into a problem. Both the left and right input wires running from the pot give off what sounds like electrical interference when I either touch either wire (or both) or even hold my hand close. Now this won't effect the...