renaldo

I have 2 JL12w6's DVC w/ 60ohm coils. I'm trying to figure out how i can present a 3 ohm load to the amp. Unless I am doing something wrong I can only get a 1.5ohm load(coils and speakers in parallel) or a 6ohm load(coils in series subs in parallel) Is there even a way to present 3ohms to the amp?

staticlag

I checked Jls site, and for that speaker it lists its nominal impedance at 2 4 ohm coil loads, but an actual impedance of 6.75 ohms.

Couldnt you do the coils in parallel(6.75/4 = ~1.5), and the subs in series(1.5*2 = 3)?

What kind of an amp are you using?

renaldo

I thought about doing the coils in parallel and subs in series, it makes sense.
I called JL and they told me there was no way to get a 3ohm load w/ 2 subs

xxdevilzeroxx

what do the ohms mean!? in getting new subs and i need help, i have to choose either a 2 or 4 ohm........... fosgate T1 and im using a 700s rockford amp

XeRo

without getting to technical and bombarding you with info, Ohm's are resistance or sometimees referred to impedence...the lower the impedence of your speakers, the more power it will draw from the amp. Look at it kind of like a water hose...you can turn it on full blast but depending on the attachments you use on the end determine the amount of water can escape.. Speakers/subs usually come in 4, 6, or 8. Everytime you wire multiple speakers together you cut the nominal load by the amount of speakers you are wiring..:

----- nominal impedence (impedence of 1 driver)
Rt = ------------------------------------------------------ (Rt = total impedence)
----- number of drivers

that is the "formula" if you are using speakers with the same impedence which most normal people do...

staticlag

Their probably using the nominal impedance # of 4 ohms(2 in parallel coils, 8 in series), to tell you that. I dunno, do you have a multimeter that measures resistance? You can pick one up at radio shack for under $20 ( I have the yellow pocket calculator sized one, i keep it in my glove box to test the occasional bulb that goes out). I would try the parallel coils, series speakers and measure the total resistance w/ the meter.

If it was me, I would use the nominal impedance listed (of 4, in which case you probably couldnt do a 3 unless you made some sort of custom add on resistor setup, and that would get dangerously hot while operating that wattage, causing more problems), but I guess you can just feel it out as long as you dont go too low with impedance and risk a short.

Or, just get two amps, bridge them, and setup your speakers for a 6 ohm load.

renaldo

xxdevilzeroxx: go here http://www.jlaudio.com/tutorials/wiring/ for a better understanding of how wiring effects the load presented to the amp

I ended up wiring them in a 6ohm load, it actually sounds really nice so i'm just going to leave it the way it is.