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Directed 1100d with 2x12 JL 12w3v2


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vw_nutta 
Member - Posts: 6
Member spacespace
Joined: March 22, 2003
Location: United Kingdom
Posted: March 31, 2003 at 2:51 PM / IP Logged  

Hi, i'm back again!

I want to buy the 1100d directed amp and run two of JL's 12w3v2 subs.

The amp is said to run 1x800w rms at 2ohms. I checked on JL's website and 400rms per sub is more or less ok.

I'm a little thick so laymens terms are needed with me, What ohms do I buy the subs at? dual 4 or dual 2?

I don't really understand the ohm thing, so thats why i'm asking. Cheers!

Cletis 
Copper - Posts: 59
Copper spacespace
Joined: March 26, 2003
Location: United States
Posted: March 31, 2003 at 4:42 PM / IP Logged  

If the amp you are buying is stable at 2ohms mono, which it looks like it is, I would go with the dual 2ohm subs.  By wiring them series-parallel, you will get a 2 ohm load and get the most power out of your amp.  To wire series parallel wire the positive on one coil to the negative on the other coil on the same sub, this will leave you  with one positive, and one negative terminal unhooked on each sub.  Now wire the two subs together positive to positive, and negative to negative.  Wiring this way will give you a 2 ohm load.

bberman1 
Gold - Posts: 2,314
Gold spacespace
Joined: March 11, 2002
Location: United States
Posted: March 31, 2003 at 4:49 PM / IP Logged  

Like Cletis said go for the 2 ohms model and here is a diagram of how to wire them http://www.audiobahninc.com/tech/wiring/parallel_series_dual_2_ohm.pdf

dragonrage 
Copper - Posts: 193
Copper spacespace
Joined: March 15, 2003
Location: United States
Posted: April 01, 2003 at 9:53 AM / IP Logged  
The parallel resistance formula on that site is incorrect. Rparallel = 1/(1/R1 + 1/R2 + 1/R3...)
2009 Pontiac G8 in planning stage
HU: ?
Speakers: ?
Amps: ?
dragonrage 
Copper - Posts: 193
Copper spacespace
Joined: March 15, 2003
Location: United States
Posted: April 01, 2003 at 9:57 AM / IP Logged  
The 2 speaker DVC picture is also wrong. That shows all coils in parallel with 1 speaker phase reversed.
2009 Pontiac G8 in planning stage
HU: ?
Speakers: ?
Amps: ?
vw_nutta 
Member - Posts: 6
Member spacespace
Joined: March 22, 2003
Location: United Kingdom
Posted: April 01, 2003 at 11:51 AM / IP Logged  

thanks for the comments. I actually found the wiring diagrams off jl's website just after I posted on here, i'll be buying the 2 ohm ones as you said.

cheers again everyone.

I may post another question about equalizers soon, so keep an eye out. c ya. ;-)


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