Originally posted by Silverback
if that's a dual voice coil 6 ohm speaker, it's gonna suck on whatever amp you put it on. Even run mono between the two voicecoils it'll only be running 3 ohm.
With an effecient amp, you want to be running 1 ohm mono, or lower, for the best bang.
It'd be better to find a 2ohm speaker, non dual voice coil.
In all honesty w3's are meant to be run in sets of 3. That's how JL audio designed the dual voice coils.
3 6ohm speakers run mono will put you down to 1 ohm.
I see that he has already gotten a different sub, but the dual- vioce coil 6 ohm sub would have worked very well.
Remember that a two channel amp, when bridged, will "see"
one half the ohm load that is wired to it.
So, a dual 6 ohm sub wired parallel (+'s wired together and -'s wired together), becomes a 3 ohm speaker. Connect this to a bridged amp and the amp will "see" a 1.5 ohm load.
It is true that JL designed the dual 6 ohm subs to be run in 3's, but the idea is to get a 4 ohm load.
We get this load by running the voice coils of each sub in series and the subs themselves in parallel.
To do this, you run the + from one voice coil to the - of the other vioce on the same sub (known as series wiring). You are left with one + and one -. The load will be 12 ohms at those terminals.
You then wire the three +'s together and the three -'s together (known as parallel wiring).
This will give you a 4 ohm load (12 ohm speaker divided by the number of speakers in parallel ((3)), equals 4 ohm load).
Most amps on the market will run a 4 ohm load when bridged.
Just FYI, if anyone is wanting to run 3 subs, you do not have to buy JL, most higher quality amps (Kicker, PG, higer line RF, PPI, etc...) will run three 8 ohm subs in parallel. 8 ohm speaker divided by the number of speakers in paralell (3) equals a 2.6 ohm load.
Oh, and in response to Jose's question:
The new JL amps are designed to put out the same power almost regardless of the ohm load (more wiring options).