R
rlorentz
New member
Hey, sorry if this doesn't quite fit the topic here but this was the closest I could find 
For my studio I use a lot of unorthodox gear and patch it in to my mixing console (mackie 1604). Frequently I have problems with gear that only has a "headphone" out.. sound comes through, but it's so so quiet.. even with full volume, full gain, full EQ, it still is extremely quiet.
I'm thinking it's an impedance mismatch, if I understand correctly this gear is expecting a high impedance on the other end (headphones) and gets a very low impedance (mackie in's). So, trying to drive the low impedance takes more current than the output of the gear can give, so the voltage drops, and the sound gets more quiet. Am I on the right track?
If so, is the solution to use an amplifier or an op-amp like a buffer between the gear and mixer? Anyone have any thoughts on schematics for a good general purpose amplifier for this purpose?
Thanks,
Robert

For my studio I use a lot of unorthodox gear and patch it in to my mixing console (mackie 1604). Frequently I have problems with gear that only has a "headphone" out.. sound comes through, but it's so so quiet.. even with full volume, full gain, full EQ, it still is extremely quiet.
I'm thinking it's an impedance mismatch, if I understand correctly this gear is expecting a high impedance on the other end (headphones) and gets a very low impedance (mackie in's). So, trying to drive the low impedance takes more current than the output of the gear can give, so the voltage drops, and the sound gets more quiet. Am I on the right track?
If so, is the solution to use an amplifier or an op-amp like a buffer between the gear and mixer? Anyone have any thoughts on schematics for a good general purpose amplifier for this purpose?
Thanks,
Robert