Wierd Buzz From My Soundhole Pickup

[jalbert]

I went and checked out a Marshall AS100D Acoustic Soloist amplifier. I really liked the sound but it made this strange sort of pulsating buzz. The guy at the store said the problem was with my Lawrence A-300 soundhole pickup. I like the pickup and it's the only one that will fit the small soundhole of my 1972 Takamine F312. Anybody know why that pickup might cause that buzz? I've never noticed it with other amps. Any ideas? Thanks.

 

[boingoman]

Is there another amp right next to it you could plug in and check?

 

[jalbert]

I didn't try it in another amp at the store but I've used it with a fender amp and had no problems.