Hi, i rcently bought 2 kenwood kfc-3009. they are two twelves, 4ohm single voice coils. the subwoofers are rated 200 watts rms, and 800 peak. With those subwoofers, i also bought the 2 channel kenwood amp, which is 2 ohm stable.
460x1 @ 4 ohms
230x2@ 2 ohms
150x2@4ohms

I wanted to run it 230 watts per channel for each sub, so i paralleled the subs, to a 2 ohm load, and then hooked the cables in the bridge spot. is this a right connection, because the guys at circuitcity said that while i wire the subs at the 2 ohms load, and then bridge them, it'll cut the ohms in half, therefore running at 1 ohms, which is not stable. is this right? how do i get 230 watts per sub?

He looked at my setup, and said that i can only run those 2 subs at seperate channles, therefore only running at 150 watts per sub, which is underpowering it by 50 watts per sub.

Thanks.

 

bridging doesn't change the ohm load. sounds like you have it right... bridge it and run the two subs in parallel for 2 ohms.

 

ive got the same subs, but i have a rockford punch 800a2 amp. ive got them bridged. i beat the guts out of them and they sound suprisingly good. always turns heads. the amp i have at 1 ohm is accually putting down closer to 1000w but the subs take it. how much did u get them 4?

 

I have to disagree. If each sub is 2 ohms, and you hook them up in parallel, the new resistance is now [1/{(1/2ohms) + (1/2ohms)}] = 1 ohm

 

tho im sure ur amp will push them i doubt that it will be able to reach the full potential of those subs.

 

your amp won't run 1-ohm

kenwood's never run 1-ohm stable, even if you bridge + parallel, it will still run 2-ohm impedance

 

you have the kenwood KAC-929 if i remember from the power ratings...and that amp won't run 1-ohm...i've tried




and tell circuit city to shove their info up their @$$....

just put 2 diff sets of speaker wires into the bridge spots (1+, 3-) i believe, and them make both of those go 1 to each sub....thats how I ran both my infinity's at 230w @ 2-ohm x 2.

I think you'd get better performance if you just bridged them to one sub, and overpowered it to 460w. I had my infinity reference (300w RMS) run at 460w, and it sounded great.

I now run my solobaric round (300w RMS) @ 400w (Kenwood 8101D). Sounds great still

Comparing 1 sub to 2 subs = ~5% volume increase. I really don't notice the diff from 1-sub to 2, cept for the space saved.

 

the amp is the kax 7201. each sub is a single voice coil 4 ohms. i've paralled wire them to a total of 2 ohms impedence, and as i said, the guys at circuitcity said that when i wire the 2 ohm loads, and bridge them to the amp it cuts the 2 ohms in half, leaving the amp to run at a 1 ohm load. was he full of it, cuz iwant to make sure before i mess up my amp. and by the way, if i wire the 2 wsubs parallel, and hook it up to bridge spot, do i select stereo or mono settings? the amp has a choice between the 2, a small switch, wasnt sure which one to use. Thanks

 

OMG the people here. Two 4 ohm subs, wired in parrallel will yield 2 ohms. The problem is the amp is not rated to perform @ 2 ohms bridged mono. It's capable of 2 ohms stereo.

You either need two 8 ohm subs (or dual voice coil @ 4 ohm per vc), wired in parrellel to get to a 4 ohm mono resistance. Or two subs, with dual voice coils @ 4 ohms each, each sub wired in parrallel, and each wired into the let/right outputs for 2 ohm stereo operation.

Lastly, you could use your subs, but get a 2 ohm mono stable amp.

Other than that, your left with each of the subs now, wired directly to each channel in stereo @ only 150 watts RMS per speaker, or only one sub wired to the mono connections for the 460 watts RMA mono setting.

 

use stereo

just wire how i said and see how it works....unless you've done it already

if its not enough bass for u, just bridge them to 1.

 

And smoke the amp at 2 ohm mono. The amp is rated for 4 ohm mono.

 

Lots of bogus info here.

Bottom line dude - you are not going to get the performance you want out of the combo you have. You either need 1) diff subs 2) diff amp 3) another amp.

See if you can get those same subs in a 4ohm DVC. That would work.

Last, even if you fix the combo, that is peanuts for power. Really you should give each sub 1/2 of the peak (400, aka program). I would hit them with 800 each for headroom and punch, but you're likely to blow them up doing so.

 

Thanks for the info, i was unsure, especially after looking at the kenwood website, their explaination of the amp's 2 ohm stable, stated that 2 4-ohm speakers can wired parallel to 1 channel of the amplifier, and provide 100% more power than with a 4 ohm load. and it did not state weather if it was stable in mono or stereo, but a more experienced person can determine that by looking at the power ratings.

Thanks.