Need audio tranducer to 50 khz

[amdx]

So you assume it is flat? Good move.

Hi PeterD,
Here's my original post,

I'm looking for a transducer and preamp to record audio up to 50khz.
Seen any circuits or transducers for this bandwidth?

I received one response that pertained to the question recommending a mic
and preamp that cost $1950.00, I was looking for something much cheaper.
Do you have any info that would be helpful?
Mike