I rented a P.A. for my band, and recently i've been trying to mike my acoustic. However, when i turn the volume up loud enough so that you can hear it, there's terrible feedback when the mike is close to the soundhole. Then, if i move the guitar away because of the feedback, you can't hear the guitar.

Can anyone help me? The mikes i have are rented too, so maybe it's because they're not meant for guitars?

Also, i'm thinking of getting a pickup for my acoustic. What kinds are good? Soundhole or otherwise? How hard is it to install? Any other suggestions?

Thanks again.