Try using some GOOD headphones.
ACME's never lie and sound just like 'em.
Read the POD manual and you'll find out about grapic EQ and cab swapping. Changing cabinets sometimes helps. As far as "frequency" and "boominess", play notes up and down the fret board slowly...find out WHERE the "problem" areas are. Then use this frequency chart:
http://www.contrabass.com/pages/frequency.html
and the graphic EQ in the POD to help balance things out before it gets recorded. I've gone so far as to write the frequencies for B-E-A-D-G-"high G" on white duct tape stuck to my POD so I don't have to recall them. The graphic can also be used to BOOST frequencies(carefully) at/around those dreaded bolt-neck basses "dead/weak" frets.
How are you converting the POD output into the PC?
I use one of these that works fine:
http://www.xitel.com/USA/prod_inportdl.htm
It's also useful for converting any analog audio(vinyl, tapes, DVD player audio output) to digital.
For post EQ of stuff recorded live with a Zoom H4(
http://www.samsontech.com/products/p...fm?prodID=1901) and other stuff, I use Goldwave(
http://www.goldwave.com/features.php )...mainly the parametric EQ where you can select any number of "frequency controls", control center frequencies, and EQ width. Normally I use about 16 frequency bands
NOTES:
The tube preamp setting on my STEREO OUTPUT Behringer POD-clone sounds as good or better than the Line 6. The Line 6 XT Live goes to gigs though..
Your public library or internet should have tons of recording info. Here's a jumpstart:
http://mixonline.com/basics/education/ http://mixonline.com/ http://www.prosoundweb.com/studyhall/
