The systems outlined in the $500 audio challenge would suit your car just fine so read through and see what your money can buy. $500 is a very small budget if you want a "sick" system so I suggest you stick with some or all of the gear you have and build on it. You won't get anything better in the $500 range when you are looking at 12" subs. So combine your head unit with this for example...
BASS Upgrade: $459.95
Amplifier + 2 12" subwoofers
You think the factory system sounds fine except there is no bass and you need something pounding out bass lines in your hatch or trunk.
Alpine MRP-M450 250W x 1 Car Amplifier $199.99
When thinking about bass, you need to pick an amplifier first because it's the biggest ticket item and it will determine which subwoofers you can run. This Alpine monoblock is priced just right to fit our budget and will put out 1x400w @ 2ohms. 400w is more than enough power to compliment the factory speakers. Any more and you'll be drowing out the midbass and treble.
2 Alpine Type-E SWE-1242 12" 4-ohm subwoofers $149.98/ea
No bass system is complete without a pair of 12" subwoofers. Sure you could find a single 12" subwoofer that can handle 400w but these babies will give you the wow factor when you open your hatch or trunk.
Q-Logic QLH-12D125 Dual 12" Hatchback Subwoofer Box $69.99
A basic dual subwoofer box will be fine for the subs we picked out.
StreetWires PS08BI 8 gauge<!-- Ext Adj Item Price --> Amp Wiring Kit Blue with Patch Cable $39.99
Since you are only connecting one amp rated under 500w an 8 gauge wiring kit should be fine.
BASS Upgrade: $459.95
Amplifier + 2 12" subwoofers
You think the factory system sounds fine except there is no bass and you need something pounding out bass lines in your hatch or trunk.
Alpine MRP-M450 250W x 1 Car Amplifier $199.99
When thinking about bass, you need to pick an amplifier first because it's the biggest ticket item and it will determine which subwoofers you can run. This Alpine monoblock is priced just right to fit our budget and will put out 1x400w @ 2ohms. 400w is more than enough power to compliment the factory speakers. Any more and you'll be drowing out the midbass and treble.
2 Alpine Type-E SWE-1242 12" 4-ohm subwoofers $149.98/ea
No bass system is complete without a pair of 12" subwoofers. Sure you could find a single 12" subwoofer that can handle 400w but these babies will give you the wow factor when you open your hatch or trunk.
Q-Logic QLH-12D125 Dual 12" Hatchback Subwoofer Box $69.99
A basic dual subwoofer box will be fine for the subs we picked out.
StreetWires PS08BI 8 gauge<!-- Ext Adj Item Price --> Amp Wiring Kit Blue with Patch Cable $39.99
Since you are only connecting one amp rated under 500w an 8 gauge wiring kit should be fine.