Hi Folks,

I'm doing some serious upgrading to the sound system in my volvo.  I
have purchase and will be installing a Pioneer DVH-P5000MP and a
Soundstream D'Artagnan.  Later I might put in a Alpine PXA-H701 for
the equilization, time correction, and to see how Dolby Pro-Logic II
sounds in a car.

My next challenge is deciding on speakers.  I was thinking of going
for Diamond Audio Hex S500, especially since they only have a mounting
depth of 1-7/8" and the Volvo has a max depth of 2".

But, my main challenge is what to do for subs. I was hoping to get
some advice on what size and type of subwoofer that I reasonably
install?  The problem with the volvo is that there is a solid metal
backing behind the rear seat. The only way that sound could get from
the trunk would be throught the two unused 6x9 speaker holes in the
back.   I could use dual 8", but how good would the base be.  I was
thinking of slightly increasing the size of the opening and use dual
10" in seal boxes direct firing through the opening.

Any advice would be appreciated.

Thanks,
Mark