12W6V2 & 500/1 - How many Ohms?

[tracyrick 10+ year member]

I'm going to set my gain using a DMM. But I need to know the ohms number. I've read all the tutorials and I'm still confused.

If my W62 is wired by default from the factory with a parallel connection it says it will be 2 ohms nominal impedance per speaker. This is a dual voice coil driver.

My 500/1 will connect directly to this sub. No bridging. I think this means it's 4 ohms.

So for figuring what gain to use with a DMM, what ohm should I use? I'm guessing this all adds up to 4 ohms?

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[dkguitarist 5,000+ posts]

so you don't know if your driver is a dual 2 ohm or dual 4 ohm driver? get a dmm, turn it to the ohm (RESISTANCE) setting and hook each probe to each of the voice coil's terminals (+ to + - to -).

i think you said you have a dvc 4ohm driver. but you need to verify that data and not just assume/guess.

then just wire the positives together and the negatives together then just plug it to the amp accordingly. but your amp will do rated power from 1-4 ohms iirc so there was really no need for this question. as for the gains, the amp has a clipping indicator on it i believe. but to set the gains take your dmm and a 50hz 0db test tone, turn volume up to 3/4 probe the amp like you did the sub, then turn the gains up til you reach whatever output you wanted (there's a formula but i don't know it). if you wanna be safe, you can back the gains down a lil in case you wanna play full tilt. then just put it on your normal listening level and enjoy.

 

[GrnEydDvl 10+ year member]

I'm going to set my gain using a DMM. But I need to know the ohms number. I've read all the tutorials and I'm still confused.
If my W62 is wired by default from the factory with a parallel connection it says it will be 2 ohms nominal impedance per speaker. This is a dual voice coil driver.

My 500/1 will connect directly to this sub. No bridging. I think this means it's 4 ohms.

So for figuring what gain to use with a DMM, what ohm should I use? I'm guessing this all adds up to 4 ohms?

Your post is a little confusing, maybe because you are confused? Speakers are the piece of audio equipment in car audio that offers resistance and therefore have an ohms rating. Amps put out a certain amount of power for various levels of resistance (given in ohms).

All 12w6v2's are dual 4's. Leave yours wired in parallel like it came from the factory. Use 2 ohms for determining your target voltage when setting gains with a DMM.

500/1's can't be bridged as they are only a single channel amp. You need two channels to bridge an amp.

JL offers a gain setting tutorial on their site you might want to check out

http://mobile.jlaudio.com/support_pages.php?page_id=143

 

[tracyrick 10+ year member]

Yes, I am very confused, lol. Your answer is very good though, thank you.

Turns out JL's tutorial uses a 13W6 as its example, and it's exactly what you said - I need to use 2 ohms for the voltage of my 500/1 = 31.6V as my target. Thanks!

Now I'm trying to figure out my 300/2 for my 4 ohm MB quart QSC216's (one pair). Since each speaker is 4 ohm, and I am NOT bridging, I'm guessing I use 4 ohm?

My only confusion here is that I'm hooking up 2 speakers to one amp, so I'm wondering if that somehow means I have to divide or multiple 4 ohms by 2?

After this I'm going to go do more ohm research to figure out what 2 ohms vs. 4 ohms vs. 8 ohms really means.

 

[GrnEydDvl 10+ year member]

Yes, I am very confused, lol. Your answer is very good though, thank you.
Turns out JL's tutorial uses a 13W6 as its example, and it's exactly what you said - I need to use 2 ohms for the voltage of my 500/1 = 31.6V as my target. Thanks!

Now I'm trying to figure out my 300/2 for my 4 ohm MB quart QSC216's (one pair). Since each speaker is 4 ohm, and I am NOT bridging, I'm guessing I use 4 ohm?

My only confusion here is that I'm hooking up 2 speakers to one amp, so I'm wondering if that somehow means I have to divide or multiple 4 ohms by 2?

After this I'm going to go do more ohm research to figure out what 2 ohms vs. 4 ohms vs. 8 ohms really means.

Use 4 ohms to determine target voltage. You can think of it as each side is basically a single channel 150 watt amp controlled by one gain knob. If you reach target voltage on one channel it should be the same on the other channel for that gain setting. This is assuming you are using a proper test tone that has equal level on each channel.

Ohms are just a unit of electrical resistance. The lower the resistance the closer you get to a direct short. Check out http://www.bcae1.com/ for a wealth of knowledge.