OK so here is what me and the expert at Cheltenham Car Audio have decided upfront. Very expert guys on a par with Pier Huet in Brighton.
And boy am I ****ting myself with nerves.
We have opted to add a 10 inch sub to the rear of the car, fixed so that it doesn't donk about round corners or over bumps. Some dynamat in there. And a JX amplifier.
The amp will power the standard speakers with some more authority and also power the "sub bass"
I am spending about £580. Which in my mind is the same fee as I spent on a BMW - The Alpine system added an amp, some new fronts and tweeter and some EQ for about £370 plus fitting. I was suitably impressed as a person who uses his sound system once in a blue moon , but when I do, I like to cruise.
My theory is that the sub will "fool" my ears into feeling more bass, and thus the standard car e.q will cope mid and top enough to provide me with that HI FI type or at least ( manufacturer upgrade ) sound. Which in essence many of us want.
Granted I will still have the 320KPS issue but as I said, fooling my ears is all that I need.
If this works you can call these guys and replicate my system, if it doesn't we can discuss why.
As this is my pride and joy I am nervous about making it worse, but I am assured and pretty knowledgeable myself to note a sub can do a lot. Earlier in this thread I think one of you added a sub and was happy.
There is no lack of bass in the car right now. Certainly better than any other standard car, but its a messy dull wash of low frequency that also takes most of the EQ with it.
I will report back.