Sub wiring

No idea man. I guess they just don't build them like they used to (and RF really DID build them well back then).

That's also not to say the new stuff is junk.

It could have been a lot of things man. Don't fret over it if everything is good now.

 

Well I live by the saying "If it ain't broke, fix it until it is"....

FYI, did a bit more searching on the "using only 1 voice coil on a DVC" and found this:

http://www.the12volt.com/installbay/forum_posts.asp~TID~74640~PN~1

Interesting reading, old posts, but interesting.

 

Yeah, I've read that thread before. Post #3 is on the right track. You cut the power handling in half essentially. What I didn't see mentioned was the BL (force factor) should be reduced as well. You'd be running one coil so you'd think it would be half but I'm sure it's not exactly half since the two fields are likely to interact with each other in the gap. Either way, the specs the manufacturer give you are based on running both coils so unless you really can't help but run one, run both.

 

This is all kinda confusing to me. But on a similar note before I have to post my own thread after searching and not finding what I need. I have a dual voice coil sub 4ohm x 2. My amp is a 4 channel amp that is 2ohm stable stereo and 4ohm bridged. Now how do I wire the dual voice coil to the amp? Bridged? 2 channels (1 channel per voice coil)? Parallel? Series? Damn second semester physics! Help?

 

Run it bridged-parallel.... that will maximize the power your amplifier is able to make. The amp is 2-Ohm stable, which is what your woofer will produce when wired in parallel.

 

I guess this is what I dont understand. If the amp is 2ohm stable when wired each channel but not stable when bridged at 2ohms, then how do you wire from amp to voice coil without making unstable yet still getting max power from amp to sub. It seems if I wire in parallel I will make it unstable but in series it will not give it max power? Is ths correct or make sense? I guess im just trying to figure out if a dual voice coil can run off 2 separate channels or does it get bridged from amp then wired in paralle or series at sub and which one is stable? I will have to do math I guess and find my sub papers to see the wiring. I should get off my ass and find those papers!

 

You could bridge channel 1 & 2, send it to voice coil 1, bridge channels 3 & 4 and send that to voice coil #2. Maximizes power to the sub, no problem with 4-Ohm load, simply use an RCA cable splitter to ensure each bridged channel gets the same signal (don't want channels 1 & 2 fighting 3 & 4).

But if you're using the front two amp channels for the door speakers, well there is no simple way other than using the amp un-bridged - one channel (say #3) to one voice coil, and the other (say #4) to the other voice coil. Or replace the woofer.

 

I'll probably run it in series or take the chance and run it parallel. Amp is 2ohms stable but not sure bridged. Its only temporary anyway, I am going to get a dedicated amp for the sub that will run stable at 2ohms or less.

 

Sounds like you are trying to do exactly what I was, and it did not work for me. There is definitely a difference between 2 ohm bridged stable for a stereo and mono load. My amp stated 2 ohm stable bridged, but the affect that I saw pretty much confirmed that it was not 2 ohm bridged mono stable.

It pretty much depends on your amp. It appears very few 4-channel amps are 2 ohm bridged stable. Try it, but be ready to back off to a 4 ohm bridged mono configuration.

 

This has been my experience as well.

 

Yeah I already gave up. I have another sub I will run that's a single voice coil. I will save the dual voice coil sub for another build when I buy an amp that will work well with it. Damn Ohm and his Laws!