sub suggestion

The Kappa Perfect will be under powered, someone said that before and they are right.  Personally I would go with a JL Audio 10w0, or 12w0, both will give good sound quality and volume.  I only say a 12 because it will be marginaly more then the 10 and the extra output will be there should you want it.  What are you putting this in? Truck, car, suv, ect.  http://www.jlaudio.com/subwoofers/w0.html  I cannot disagree with the recomendation of the Rockford Stage1, Kicker Comp.  However in my mind, if the prices were equal I would take the JL's.  Good luck, let everyone know what you get.

The 340 will power your diamond audio's very whell.  Im only selling my 340 because i want to get 2 MRV-T420's, , im useing type-x components in the future and they need alot of clean power, plus im a big "over do it" kinda guy haha.

I was running a Alpine Type-E 12" bridged off channel 3/4 of the 340 in a 1.25 cube sealed box and it shook my truck pretty good, it impressed me since it only puts out like 100 rms bridged.

Hey everybody thanks for the input, this is for a 96 toyota avalon.  I think i might go with the JL's, i found one at onlinecarstereo.com for 100 bones, is that a deal?  anyway keep the suggestions comin if you got anymore.

Ok I've been doin some thinking and i really dont want a huge jump of frequencies from the 4's up front and the sub in back, im afraid that its going to be too high pitched in the front and then a bunch of bass comin from the back.  I'd like a sub or maybe even a midbass that would blend very nicely with the 4's up front and in the back door.  Also if this could be fixed by adjusting crossovers or eq's list that as well.  And i have two questions still up above that i was wondering about thanks.

Bass frequencies are non-directional, set your crossover low to minimize a directional sound from the bottom end.  Besides that, what do you plan to use up front?  If you don’t have them already, plan to get a decent pair of components, and get them as big as you can.  Most 4” can be adapted to 5.25 or even 6.5” speakers with a 10-dollar adapter.  I do not know specifically about Avalon’s though, go to a pro shop and see what they recommend doing when it comes to getting a larger speaker size up-front.  Remember you do not have to buy from them.  I use a component up-front, sub in the rear set up in all three of my cars (1991 Honda civic, 2002 Subaru legacy, 1995 GMC suburban) and it sounds great.  Only the suburban has any rear-fill at all, and they are JL 5.25” in the waaay back faded out, and run off the deck.  I don’t understand what you are worried about with the power wire and the deck.  Just buy a wiring harness.  But yeah, if you want to use a distribution block, that’s fine for this situation. 

Im not sure if i want a bass frequency or anything below 50-70 hz in the back.  I already have ordered diamond audio 4 inch components for the front and some kappa 4's in the back that are going to be powered by the amp and deck respectively (amp in 3-channel runnin diamonds and sub).  What im asking is if it will sound bad having the 4's running and then a 10 in the back, it seems like such a big size jump and i cant do anything about the 4's now so i have to use them.  The deck needs a power wire to clear up your confusion and it cant use the harness' because it is too small, but im not worried about that anymore you answered my question about that, thanks.  But now i would like someone to reccomend a setup that will blend nicely using 4's in front and some kinda bass/ midbass in the back. thank you.