It's been a very long time since I messed much with car audio and such.

Would someone please expalin to me about ohms. 8 vs 4 vs 2 etc.... why would one need an 8 ohm resistor etc....

Advantages - disadvantages?

I know that the amps and subs should match up. And that you can run the subs in a series and what not to change the load that's pulled (or whatever) from the amp.
i.e. I have two JL 10W0 8ohm speakers that I will have to run in a certain order to get them to 4 ohm so they will match my 2ohm/4ohm amp.

Thanks

 

its how you have the amp setup and more importantly, what ohms the subs are running, most are 4ohms, but some subs are 2ohms

 

how many voice cols in each of your JL subs??

if they have one each, you can wire both subs in parallel to get a single 4 ohm load from your amp.

If they have dual coils, you can wire each sub's coils in parallel to get 4 ohm loads (one per sub) and then wire the subs in parallel together to get a single 2 ohm load from your amp.

Your amplifier will give out certain wattages at different impedences (ohms). you want to match your amp up to your subs to get the amount of power they can handle. if each of your subs are 150W RMS and you wired them down to 2 ohm, then you want a 300W RMS@2 ohm to power your subs.

However your amp will have a limit to how low the impedance can go. Most D-class amps are stable down to 1 ohm and sometimes lower. MOSFET amps usually are stable down to 2 or 4 ohms. if you try to run an impedance that your amp cannot provide then you could damage the amplifier.

 

They're an older style. All they say on the back is 10W0-8 and VRC.
Don't know if it's a dual or single voice coil.

 

SVC will have on set of hook ups, DVC will have two, easy!

 

Those should be single 8 ohm voice coil subs. Not many of those left around. You can easily wire them in parallel (negative to negative, positive to positive) and you would present a 4 ohm load to your amp. Those subs do not take a lot of power so just be careful with what you send to them.

 

yeah they are SVC after some more reading. Planned on running them parallel. May need to look for a new amp though. I have two that can be used but one is only 100w and the other is 600w. 100 being not enough and 600 being too much. *sigh*

Also, is it hard on the amp and sub both directions? i.e. 8ohm sub to 4ohm amp AND 4ohm sub to 8ohm amp. Just curious.

Another question. If the Amp is 4 ohm and 2 channel and you bridge it to one. Would that change the ohm of the amp?