From Chris159 "It still lacks a bit of bass but I've managed to get rid of that horrible mid range (2500Hz is the real problem for some reason). I work in the HiFi industry so I like to think of myself as an absolute 100% expert when it comes to these things
Anyway, I've just about settled on the following if anyone wants to try it. From left to right on the eq bar from 'flat':
64Hz +2, 160Hz 0, 400Hz +1, 1000Hz +2, 2500Hz -2, 6250Hz +1, 16kHz +2. Loudness OFF, Bass 0, Treble 0, Balance & Fader Centre.
A simple explaination for those who want to get their own sound is that 64Hz is how deep the bass goes, 160 is how punchy it is, 400 - 2500 is mid range so you'll notice a difference in 'vocal' sounds, leaving 6250 & 16 as your high end, symbols etc.
You'll find that you will have to adjust the bass and possibly treble up a bit for Radio but the above seems to work well for CD & B & M.
Hope this is of use"
These settings transformed the sound in my car.
Current Italian Cars:-
2004 Alfa Romeo GT 2.0 JTS
Previous Italian Cars :-
2003 Maserati 4200 Cambiocorsa
2006 Alfa Brera 2.2 SV JTS
1999 Alfa Romeo 156 2.4 JTD
2005 Alfa Romeo 156 2.0 JTS Veloce
2004 Alfa Romeo GT 1.9 JTD
2001 Alfa Romeo GTV 3.0 V6 Lusso
2002 Alfa Romeo 156 2.0 JTS