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How can I run these subs ?


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luckydevil 
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Joined: July 04, 2005
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Posted: July 04, 2005 at 10:10 AM / IP Logged  

So I have my system planned out and was going to use 2 of the JL Audio 8w3v2 subs. I have already ordered my amps and just realized that the friggin 8w3v2'! s don't come configured for 4 ohms, but only dual 2,4, or 6 ohms.

I haven't bought the subs yet, but I would still like to use them if possible.

I was planning on using one US Acoustics USX2050 amp bridged at 4 ohms and putting out 160 watts for each sub.
USX2050 amp specs: http://www.usacoustics.com/2004/usx2050%20specs.htm
8w3v2 sub specs: http://www.jlaudio.com/subwoofers/8w3v2.html
So basically how can I still run these subs? I was thinking if I get the dual 2-ohm subs I could just connect one amp channel to each coil, essentially giving each coil 80 watts. Will that work?
Thanks to all of you for how much I have already learned on here. Great forum!
Luke
P.S.- www.thezeb.com still has those USX2050 amps on sale for $70. A friggin steal at that price, I have 4 of them.

wirewise 
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Posted: July 04, 2005 at 10:28 AM / IP Logged  
You'll want to go with 2 of the 4 ohm DVC woofers to get a 4 ohm load.
How can I run these subs ? -- posted image.
https://www.the12volt.com/caraudio/woofer_configurations.asp
~wirewise~
luckydevil 
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Posted: July 04, 2005 at 11:01 AM / IP Logged  
Thanks wirewise, but that would only give each sub 80 watts,or 40 watts per coil. I have a dedicated amp for each sub, but I am just unclear as to whether or not I can run each coil off of an individual channel without hurting anything.
I tried a search already, but I'm not exactly sure what to search for to find info on this.
wirewise 
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Moderator spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member consistently provides reliable informationspace
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Posted: July 04, 2005 at 11:06 AM / IP Logged  
If you are running an amp for each sub, then yes, you will want to go with one 2 ohm DVC on each amp with the coils of each woofer wired in series.
How can I run these subs ? -- posted image.
~wirewise~
luckydevil 
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Posted: July 04, 2005 at 2:10 PM / IP Logged  
Thank you! I've got a pretty crazy project going on so I'll be sure to post it when I am done.
Poormanq45 
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Posted: July 04, 2005 at 2:48 PM / IP Logged  
I recommend AGAINST getting that sub if you're using that amp. Take a look at an Infinity Kappa Perfect or Reference series 12in sub. YOu can get it for ~$100, and sometimes 2 for ~$120 from crutchfield
stevdart 
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Joined: January 24, 2004
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Posted: July 04, 2005 at 4:03 PM / IP Logged  

Using a separate amp for each DVC 2 ohm sub, yes you can wire it up that way.  I would suggest using a meter to measure amplifier output so that the two coils of each sub are outputting the same (although that measure of accuracy is debatable.)

But the way I would do it is to wire the coils in series for a 4 ohm load and bridge the amp.  Like this:

How can I run these subs ? -- posted image.

See...and I said it all without expletives!      How can I run these subs ? -- posted image.

Well.......I just saw the other post on this subject so this looks like an unnecessary work of art on my part.  Mods, you guys deleted the double post but put it back up anyway so we still have the original problem!  Oh well, just gave me a chance to answer to someone besides my wife...

Oh... I get it now,  duhh.  I was 'sposed to follow the link...

Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
luckydevil 
Silver - Posts: 365
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Posted: July 04, 2005 at 4:09 PM / IP Logged  
Why?
I am very limited on space for the boxes and only have .55ft^3 per subwoofer. I don't have the space to fit boxes for 12's or even 10's.
I know I could get a pair of those infinity's for about $100, but I just don't have the space.
customsuburb 
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Posted: July 04, 2005 at 6:11 PM / IP Logged  
If you have the room one 12 W3v2 in a 1.1 cf box would be louder and play deeper than two 8 W3v2s would. They would only recquire half the power also. It would need more than 160 watts though.
luckydevil 
Silver - Posts: 365
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Joined: July 04, 2005
Location: United States
Posted: July 04, 2005 at 6:54 PM / IP Logged  
You guys rule. I didn't think a single 12 would be louder than two 8's. I could just make one big box instead of the two I was planning. I have 2 new questions though...
1) Can I use my existing amps to power a voice coil each? Basically can I have one 12 with 4-ohm DVC's using two amps?
2) I'll let the cat out of the bag on this one... the sub will be going into an arcade cabinet. With a larger 12" sub it will be in a box inside of the cabinet as opposed to two 8's that I could mount facing outwards. Does that matter at all?
Thanks again and happy 4th of July.
Luke
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