Hi all
I've been building a few of the famous Cmoy headphone amps as I needed a good quality low cost headphone amp inside my latest creation and the Cmoy gets a lot of praise and is cheap. However, every time I disconnect my centre tapped bench supply and connect the battery power config or a virtual centre tapped wall wart with 2 x 4.7K resistors the amps fine at very, very low volume but distorts as soon as you attempt to get normal listening volume in 32 Ohm headphones. I notice measuring pins 4 and 8 to virtual ground that they are out of balance when running from the battery tapped or wall wart tapped supply ... any ideas ?
Thanks
I've been building a few of the famous Cmoy headphone amps as I needed a good quality low cost headphone amp inside my latest creation and the Cmoy gets a lot of praise and is cheap. However, every time I disconnect my centre tapped bench supply and connect the battery power config or a virtual centre tapped wall wart with 2 x 4.7K resistors the amps fine at very, very low volume but distorts as soon as you attempt to get normal listening volume in 32 Ohm headphones. I notice measuring pins 4 and 8 to virtual ground that they are out of balance when running from the battery tapped or wall wart tapped supply ... any ideas ?
Thanks