1fastzook,
With no trunk, that's so true, but I've gotta make do with a trunk. The bass wasn't just louder, it was a lot cleaner, and blended perfectly with the music. In my Mustang, I can't find a happy medium. Either all I hear is the low bass, with the higher bass around 80hz drowned out. Or high slappy bass with no lows. So for example, when playing a rock song with both extremes, part of the bass is nonexistent or very faint. If I set the bass level above +1 (out of 6) with the gains above 15-20% on the amp, the bass just goes crazy. The subs start flopping around, and distorting. If I lower the bass level, or turn the volume down, they sound fine up to a point. I have two different subs i've tried. 3 - JL 10W0-12's wired for 2 ohms, and a pair of Elemental Designs 11Kv2 10's wired for 2 ohms. Both have the same traits. I have also tried two different head units, a Pioneer DEH-P8MP, and a Eclipse CD8454, and the Pioneer actually sounds better in the bass department, but both are lacking in the same areas.
Seeing as how my MTX Blue Thunder PRO 150x2 is about 6 years old now, it may be time for a new sub amp. I ordered a Viper (DEI) 600.1, so we'll see how that works out.

If that doesen't solve it, I'll separate the grounds.

 

Just for the fun of it, And I know I will hear about this, Try not wiring your subs to 2 ohms. If they are 4 ohm DVC try wiring for 8 ohms.
As discussed previously, lowering the resistance of the sub lowers your damping factor. On the other hand if you raise the load to 8 ohms, you also raise the damping factor. This allows the amp to have better control over the sub.
Give it a try. You might find that you can adjust your gain more and get better overall sounding bass as your headroom will increase as well.
Good luck

 

Danbert,
That's a great suggestion actually. I would have never thought to try that due to the wattage difference but if it smooths things out, why not.
The only problems I have though is that my eD subs are dual 2 ohm. My 3-JL 10W0's are 12 ohms each. I don't know of a way I could get the JL's to even 8 ohms, since theres only one terminal on the box.

 

With the ED's it is easy just series all of the voice coils. 2+2+2+2=8
With the JL's it is more difficult in the sense that you will hit 8 ohms if you are feeding all of your subs from the same channel you have the flexability to wire all of the voice coils differently. I may be wrong here but are the JL's actually dual 6 ohm subs? If they are you can play with series-parallel configurations until you are satisfied. For instance if you parallel the voice coils on each sub and then series the three subs together, you will end up with 9 ohms.

 

Wiring the eD's seems simple enough. Would that be series or parallel at the subs?

The JL's are 10W0-12, single voice coil, and 12 ohms each. The 12 ohm version was made by JL specifically for using in a triple sub configuration, and comes out to somewhere around 2.4 ohms at the amp.

I'm still waiting on the Viper amp I ordered. I'll update after I try it out.

 

on the ED, all the coils would be in series.

 

ok guys putting it on the back frame is no problem at all you just have to know what your doing.. but I have a setup now that sounds 200 times better I will post another thread with pictures, maybe it will give you some ideas

 

I'll let you know this, If it was hooked up properly then that rear deck support would of been the perfect spot for a ground, I have mine locked in with on of the bolts back there and havent had a problem, I also have my amps locked to the back of the seats too.

Emmett