I want to run three 10s at a 2 ohm load. My question is what 10s to buy.. I have two JL W3V2s with dual 4 ohm voice coils. I need to buy one more and i was told to get a dual 2 ohm JL W3 sub... then I can run all three at a 2 ohm load.

Is that true??

 

Off one amp? Yeah, wire each DVC in series and then all three in parallel, that would be 2 ohms. Unless I fucked that up...

 

not that i know it all but see this, may help:

http://www.crutchfieldadvisor.com/le...fers_dual.html

 

DO NOT MIX OHM LOADS.

First are you going to be using the same amp to power the 3 10;s that are power the 2 10s. IF so dont do it. You will notice a 1.5 to 2 db differ.

If u wire 3 dual 4 ohm woofers in par. you get a .67ohm load or series it for a 2.67 ohm load.

 

I don't have any subs hooked up right now... I am waiting on the amp
I will be running all of the them off of a JL Audio 500/1... so yes, one amp

Is that not a good idea?

 

Not really! Why do you need 3? 2 just isn't enough?

 

The box I am running is custom made for three 10s... and a little extra bass doesn't hurt.... but its mostly for the box.

I am running through the equations here and im coming up with 2.67 running three DVC 4ohm subs. I haven't really seen anything saying not to run two 4ohm and one 2 ohm... and that gets me a little closer to 2 ohm at 2.4 (if my math is right)... Why is this not a good idea.

at 4 ohm... this is what im planning... let me know if its wrong or any other ideas anyone may have
_______________________________ +
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---+[ ]+] ----+[ ]+ ] ---+[ ] + ]
| - -] | - - ] | - - ]
| L_____|___|_L_____|__ |__L______|____ -
L_______| L______| L_________|



I know this looks REAL fucked up... but hopefully you get the idea...

 

whoa shit... nevermind... that didnt come up the way I planned...

 

 

You have a reference for this?

Yeah, three 4 ohm DVC in parallel-parallel and series-parallel config. respectively, but that's not what he was asking. Two 4 ohm and one 2 ohm wired in series-parallel configuration would present a 2 ohm load.

 

your right... my math was wrong....

Two DVC 4ohm subs wired in series gets me to 8 ohms each.... the other 2 ohm wired in series... gets me to 4 ohms.

Wire them together in parrallel gets me to 2ohm exactly...

Anyone know if this will work... of not... why not??

 

Don't mix ohm loads. Get another D4.

 

I am leaning towards that but I just want to know why... anyone have any technical reason that this won't work. The only think that erks me is that I haven't see anything on the JL (or any other site) that says that this will work... but there also isn't anything that says it won't work.

 

Here's link to the formula
http://www.1728.com/resistrs.htm

1.3333ohms! Not good for almost any amp!

 

If u are gettin a JL 500/1 why does it matter. It produces the same power bewteen 4 to 1.5ohm. So get another dual 4ohm if you have the box. Later you can always add more power.

 

Unfortunately his load is below 1.5ohms @1.3333. 1.5ohm is still pushing the lower limit. You could have potential clipping issues once it gets hot.

 

why is his omh load 1.333. I think I missed something. Sorry I am having a slow day.

 

The ohm load is exactly 2 ohms with two DVC 4ohms and one 2 ohm sub.

Where are you getting 1.33??
if you run the two 4ohm DVCs is series they are producing 8 ohms a sub... not 4

 

It's not. You didn't. 1.33 would be 3 SVC 4 ohm subs.

 

Your diagram!!!!!!!!!!!!!!!!!!!!!!

2.6667 if you're putting 4ohms in series and a 4ohm parallel.

Your diagram doesn't show anything in series! Nor does it have a 2ohm speaker.

 

Dude... no need to yell... i think you are confused

Each speaker is a DUAL VOICE COIL. So each coil is 4ohms and when you run then IN SERIES it comes out to 8ohms ... like so:



This is a Dual-4 Ohm Subwoofer in Series at 8 Ohms

NOW... you run each sub like that at 8 ohms... then run the whole thing parrallel and it comes out to 2.66667.... THIS IS A THREE 4OHM SCENARIO

Here is the full diagram:



NOW... if you change one of then to a 2ohm sub and run it in series... that makes is 4 ohms.... following me?

So here is the math

1
___________ = 2 ohms!
1/8 +1/8 +1/4

 

Yet a different diagram......

should have posted that one in the first place.

anyway, looks like you answered it yourself!

Good job

 

Yea... thx bro... lil research goes a long way. But that is the exact same diagram... just different site and angle.

 

Different diagrams, but they are diagramming the same thing. It may not be obvious from the schematic, but the + to - jumper is a series connection between the two voice coils.



Anyway, does anyone have a link to explain why mixed ohm loads are a bad idea and not just rumor?

 

BTW-I missed that whole 2ohm speaker and calculated it as 4ohm

 

If there is a difference in impedance, then the sub with a higher impedance will get less power. The overall affect would be one sub being louder the other.


Think of it as this way:


You have a 10" (diameter) water hose. It gets split into 2 different size hose. 2" and 3". The 3" (less restriction) will have more capacity to flow water than the 2". In a specific time frame, the 3" will have more volume than 2".


You dont want one sub getting more power than the other., unless you dont care about how the bass will sound like.