Headphone Amp (Chu Moy) : 10 Steps First step is to solder wire to all the pins of the headphone jacks, about 2 inches long. once this is done we can solder up the potentiometer (these are not connected to the amp till later so you dont need to worry about layout, just solder a length of wire to each of the jack pins and for the pot, see the image below) your jacks layout may differ, however it usually goes from top (closes to the hole) to the bottom Ground right left .
Chu Moy Headphone Amp – Circuit Wiring DiagramsThis is a Chu Moy headphone amp I made. I got the PCB design from Guzzler from Head-Fi and the original design is very popular and is here. I changed Guzzler’s layout so I could use a Taiwan Alpha pot on the PCB. These pots a high quality (some say better than ALPS blue velvet) and are available from Jaycar. You can see the thread here.
How to Solder together a headphone amp with an Altoids can ...Thankfully Tangentsoft.net has some incredibly detailed instructions for building the Chu Moy amp. Now one thing you'll need to be aware of are the OPA2134 OpAmps. There great but if want them you'll need to order them online at DigiKey and Mouser. For resistors, LEDs, and headphone jacks you can pick those up at Radio Shack. Happy soldering!!!
Modified Linkwitz CrossfeedA populated Modified Linkwitz Crossfeed PCB (v1.2) I won’t go into much detail about this circuit, since Chu Moy’s article has all the info you need if you want to tweak the circuit. I do have a version of the schematic here.. Parts. The circuit uses four capacitors and 10-12 resistors, depending on whether you want single-level crossfeed or a high and low crossfeed setting.
A Passive Preamp/Switchbox for the Desktop. – HeadWize ...by Chu Moy. One of the more frequently requested projects on HeadWize has been a switchbox for selecting multiple audio inputs. I built this passive preamp/switchbox several years ago to switch between two stereo sources (a portable FM tuner and portable CD player) AND two stereo outputs (a computer speaker system and a headphone amp).
A Pocket Headphone Amplifier. – HeadWize Memorialby Chu Moy "Thank you for your amplifier design. I built it and can't believe how wonderful it makes my AKG K340 headphones sound as well as my Sennheiser 600." - A DIYer. While doing research for the article Designing an Opamp Headphone Amplifier, I built a portable headphone amplifier for testing purposes. Each channel uses…