[LAU] Need simple help measuring frequencies

[robert lazarski]

Hi all,

I converted the bass track off a midi file to ogg, muting out all the
other tracks via timidity. The purpose being I'm about to buy some
monitor speakers and I'm deciding what low frequency range is
acceptable. I tried audacity and analyze-->plot spectrum, but I can't
get that to show me what the low end is doing (I'm sure I'm missing
something simple).

Anyways, here's a link. What frequency is that bass around? How can I
measure that?

http://braziloutsource.com/random/carnival_bass.ogg

If curious, I'm looking at the m-audio bx8a. I live in a remote place
where I can't just walk into a store and demo them, so I have to buy
off the internet.

Thanks!
Robert