as for those notches, use a high-quality EQ plug-in, something linear phaze. (Algorithmix, the EQ built into Ozone 5 etc.)
You want to smooth out those regions with as little added coloration as possible.
I'm blind, so I can't tell you how to look for the regions on a fancy spectogram of some kind. But, for a start, 150HZ sounds like a slightly sharp 3rd octave D natural. 9KHZ sounds centered around one octave higher than 8th octave C#, if you can imagine a piano keyboard extending about an octave higher than normal Sorry, I'm a musician with ears so I tend to refer back to musical pitches when I do this.
If you want to train your ears, might I recommend a set of CD's produced by Dave Moulton, of Moulton Labs called Golden Ears. Excellent stuff!
Believe it or not, with enough practice, you'll be able to focus your ears like a lens in on a particular part of the spectrum, first an octave wide, then as narrow as 1/3 octave.