Bass/synth rig dilemma

I'm looking into making my rig useable for both synth and bass. Currently I'm running a Peavey Classic 400 into an 810 and an Ampeg V4 into an Ampeg V2 412 with upgraded speakers, in a doomy project. Volume and low end are very crucial, but I'm mainly playing bass vi and keys/noise. I'm considering picking up 2 of the Carvin LS1503's that were really popular here a couple of years back and running them with a Fender PA 100 or similar. What other suggestions do you guys have? Obviously I'll run through the PA live for the most part, but we play a lot of house shows and smaller venues where PA support isn't adequate.

 

It's not going deep enough on the low sweeps. I can't tell if it's because of the EQ or what, but it's definitely lacking low end compared the sound in a PA. I want to get that low end back with the same amount of tube grit I'm currently getting.

EDIT: A little more accurately, it just doesn't full as full range? I like how the highs get tamed/warmed up but it seems to lose some bass response with that warmth that I'd like to have back. I've also noticed that using a really clean sounding reverb makes the whole thing pop a little better?

 

That's definitely one idea that I've been considering. I do really like the tone of the V4/V2 rig for the bass VI though.

I really like how colored it is, but this seems like the way to go from everything I've read. Could two of those Carvin's (3 way 15's) with a power amp and tube preamp do the same thing? I'm trying to keep costs pretty low as well. Or if I just switch the cabs and use the Classic 400 for it?

 

Would definitely like to clarify that colored/limited is a pretty "good" thing for me. I want the color of my amps preamp for sure, it's just the actual reproduction by the cabs that's lacking. Synth is mainly used as a mid lead/noise deal in this project and the guitars and bass are tuned so low that trying to play bass lines will just muddy everything. Also one of the outs from the mixer in my noise/synth rig always goes to the house PA. I guess my question is mainly if I'm trying to do this on the cheap is a 3 way PA cab a good way to have a modular rig that can be used for multiple applications? Would it be easier to build this with a poweramp and tube pre of my choice? This whole deal is a pretty long way off financially, but I just want something that can be mind numbingly loud and versatile.

 

Yeah... I play in some ridiculously loud bands and I don't think I could get an SVT to give out.

 

Okay, I think the top+sub rig is definitely something I'm going for. A poweramp will definitely come next