Re: Bypassing Boston amp with Kenwood 5ch...
Well the pain is over. After a couple hours of tuning, listening and driving, its about as good as its going to get.
These were my final settings...
Volume offset: -8
Subwoofer level: +15, 85Hz LPF, phase Normal
Bass: 80hz, Q1.5, -4
Middle: 1.5KHz, Q2, -2
The sensitivity on the sub amp (eXcelon X500-1) is set near 1Volt (~2/3) with a line level control knob mounted in the left dash cavity. RCA's go from headunit to knob, then knob to amplifier. It makes sub level control much easier and more precise to suit the song.
I decided against running a high pass filter. The mid-basses hit on some premature distortion but running 80Hz @ -4 helped alot. Since both the door speakers and subs play at this frequency, it doesn't sound like there's a big dip in the response. The tone is good overall, and I enjoy what Boston did in their dsp/alignment profile. I really enjoy the soundstage they set up, and the Infinity Reference 3.5's play great on the Boston amp. New door speakers are definitely the next step.
Also, thanks to Custom Sounds, the hissing noise quieted after a thick heat shrink was applied to the wiring for the pac adapter. The hiss is still faint when switching sources or waiting for a cd to load. Maybe i'll ground the dash harness to the firewall and see if that helps.
This went a lot smoother after looking to understand better what each component was looking for level-wise and how to create those levels wih settings. The results, for the amount invested, I rate as very positive. The system retains the benefits of Boston's processing, but has a proper low-frequency provider (love my Microsub) and a much smoother, warmer stage thanks to the Infinitys. I should note on those that even with the honeycomb trimmed out, the dash grilles did not clear. When mounted, they both contact the tweeter's metal grille, albeit slightly.
Thanks for the ideas and info guys. Im enjoying the way it sounds.