Re: Equalizer\'s
Agreed about adding an EQ in - an EQ is a last resort. When you finish your system, if there are dips and peaks in your frequency reponse that you just can't fix with your regular controls, an EQ is for you.
An in-dash EQ is good if you want instant switching for your music. A good setup to have is an in-dash EQ for on-the-fly adjustment with specific music, and a trunk-mount EQ that you set and leave it alone.
Pioneer EQ-6500: I ran this piece for about 9 months or so - I loved it. It offered a lot of control over the system, three RCA outputs, lots of sub control features, etc. It was very useful. I sold it back in January though.
When it comes to distortion, the less items in the chain, the better. Anything along the way can cause distortion. However, I never had that problem.
I'm picking my Blazer up within a month it looks like; when I reinstall my system in there, I will have a Pioneer DEQ-7600 in the dash(full-DIN DSP/EQ 15-band graphic), and a HiFonics VII Pegasus 28-band 1/3-octave EQ in the hatch. Can't wait to set my stuff up in there.