No, you should gold plate all your speaker wires where they connect, no, wait, get $45/foot RCA interconnect cable...
Come on guys, he's only got $400 & change, help him get the biggest bang for his bucks where he will notice the improvement the most.
- He's already said he isn't all bass-headed and he's got bass now that he says hits hard, why waste $$ on upgrading an electrical system which is obviously working well enough to please him with enough bass where the high current is required.
The guys who said that you need power on your mids are right!
One thing you could consider is adding what I add to almost all my customers vehicles, mid-bass drivers in pods firing straight up from right in front of the seats on the floor just behind where your feet are. I use Focal 5", two of them per side, side by side which uses a little floor space (and isn't a pain for foot resting for most people.)
You can't believe the difference! You just can't really get the warmth of real mid-bass when you have drivers right at the 1/4 to 1/2 wave point, spaced apart and firing exactly out of phase toward each other from right door to left door causing cancellation, unless you angle them hard upwards, even then it's weak in comparison.
You don't
need the rather expensive Focal 5", you can go to Parts Express, Madisound or other to find a good mid-bass driver to add which only cost about $40@. Then you WILL NEED POWER up front, makes so f'n much difference!
SO F'N MUCH DIFFERENCE!
I've used these with good results, just for the mid-bass octaves from ~75Hz-250Hz:
5" mid-bass - Make sure you cover them with grill cloth since they have an open gap. I use the 4 ohm when there's only one per side, or parallel a set of 8 ohm when there's two per side.
Maybe snag a decent MTX 1502 from
ebay - or equivalent - or fix your Memphis for 125-$150, but I often see the N-channel V-Fet 1502 amps go for about $75. Get a pair of them, or a good 4-channel and you can power both the 3.5" and the mid-bass drivers.
I just found
THIS.
And if you can fit, and live with, 6.5" on the floor - WOW!
- Otherwise, 6.5" in the doors & an amp for the front will most benefit your ears, especially for that amount of ca$h.
Have fun whatever you end up doing.