Kalamazoo Hum
Mon, 05/27/2013 - 18:32
Hi, Skip.
Lately, I've noticed that when I mic. my Kalamazoo for recording, I get a hum that seems to change with positioning of the microphone (seems to get louder the closer the mic is to the power transformer of the amp, and changes some with direction). The amp itself is very quiet, but I can't record it without the hum (I tried a couple of different mics).
Also, when I try to record with my speaker-driven line out, I get a hum as well (also when I plug the speaker-driven line out into a PA). Again, the amp is quiet as a mouse (humless) all by itself.
Any suggestions?
Thanks.
Mark H.
Hello Mark- For recording, I would suggest moving the mike at least two feet from the speaker- it sounds like you are picking up a physical humming of the power transformer.
If the amp is quiet, a properly installed speaker-driven line-out should be quiet. You should try flipping the AC polarity of the Kalamazoo using an old-fashioned three-to-two adapter. Report back!