[sdiy] OT question about interfacing (impedance mismatch?)

[Byron G. Jacquot]

>It is probably a level problem not an impedance problem. The CD input
>is probably
>expecting a higher voltage than the headphones require.

The input is probably 10K or 22K, so it's probably not an impedance issue.

My guess is that the headphones output is one of those new, hi-falutin, class-D low voltage headphone drivers, hanging from the +5V or +3.3V rail.

My single AAA battery powered MP3 player works great with hi-efficency headphones, but just doesn't want to drive the levels that "real-world" interfacing demands.

Byron Jacquot