Ok, in the golf we have so far;

Sony cdx3300 HU with one set of phonos,
87mm mac audio co-axial in the dash,
6"x4" mac audio co-axials in the shelf supports,
Sony 2 way 6x9's in the shelf (be quiet guys I don't like them either but em does,)
12" mutant sub in a sealed enclosure,
300watt max boss audio amp running the sub.

I got given a fairly old jenson A1000 the other day. All I can find out is that it's 100wattx2 (dunno if thats max or rms, the amp doesn't say but by the looks of the + lead coming out of it, it should be max.) it's bridgeable and is a mosfet amp. It doesn't have a crossover. I do have a couple of treble blockers though.

So, what should we amp up, and how? At the moment, the fronts crackle if we turn the hu up too far, so I don't know if the amp would help or make this worse? Also, as the hu only has a rear/sub out it's currently set to "sub." Obviously I'll need a phono splitter, but I don't want to be sending a sub signal to the fronts (if I amp those,), and if I set the output to "rear" and want to be able to hear the sub then the rear fill is way too big.

Would I be sensible to swap the speaker locations, and have the sub and fronts on the rear output, and the rear speakers on the front output? That way i will have a bit more control.

Or should I just amp the 6x9's off the "sub" output and have them running the mid bass. I suppose I could then leave the hu running just the smaller speakers?

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Jon+Em

fronts if they can handle the power, if not replace then amp

don't have the cash to replace them! I just have enough for a new main power lead that can handle the power of both amps. Think I have 10awg in at the mo, and will be going for 4awg through the car, and then the 10 to both amps, which I'll mount on some spair mdf behind the rear cards, like this:
http://www.clubgti.com/forum/showpost.php?p=838142&postcount=15

Jon.

I'd amp the fronts out of your choices - just be careful at first with the gain

I really don't think they can handle the power! Plus, it's gonna be a major hassle to balance the sound. Thinking we might just leave it out, as It'll prob make it all sound worse.

Jon