[racerraul]

Anyway...

I am searching for 7 ch. of amplification (100x4, 200x2, 300x1) in two amps only ...

I am guessing you need this much power as follows...

100x4 (Mids & Highs???)
200x2 (Midbass???)
300x1 (subs???)

If so, you could make this easier on you by realizing that 50x4 for mids & highs is plenty of power to drive them into uncomfortable listening levels...

If I am guessing right... I recently bought 2 JL e6450 & I am very pleased with them... thought you might be able to work them into your design if their size allows it...

Here is a review on them...
http://carsound.com/articles/publish/article_268.shtml

 

[racerraul]

2 Alpine MRV-F345 (50x2 tweets & 300x1 L midbass) (50x2 mids & R 300x1 midbass)
1 Alpine MRD-M605 (400x1 4ohm, 600x1 2ohm subs)
< $900

or

2 Diamond Audio D3 400.4 (50x4 mids & highs) (200x2 midbass) 4ohms
1 Diamond Audio D3 400.2 (400x1 subs 4ohm)
<$800 (Lifetime Warranty authorized)

 

[racerraul]

The Alpines will fit...

Put the F345 next to each other (26" total length)
And the M605 is about 8" wide...

All 3 side by side is a total of 34"... looks to me the Alpine will fit with a little creativity...

 

[racerraul]

Ok...

The F345 + M605 side by side would be 13" + 8" = 21" total < 24"
Another F345 would fit in the 14" space... 13" < 14"

 

[racerraul]

I was recommending the 3 amp option assuming a 8ohm midbass...

For what it is worth, the F545 birthsheets I have seen have it cranking out 180+ watts per channel @ 14v... so it definitely has grunt