suggestions for sub and amp hookup
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=34011
Printed Date: May 28, 2024 at 2:30 PM
Topic: suggestions for sub and amp hookup
Posted By: AJRXtreme
Subject: suggestions for sub and amp hookup
Date Posted: June 16, 2004 at 3:11 PM
i have 2 12 inch audiobahn subs and a JBL BP-600.1 amp. There are so many different ways i can connect the subs to the amp, but i wanted to know the best way to hook them up. (ex. parallel, 2ohms,1 ohm, etc.). I want to have 300 watts RMS going to each sub. I also wanted to know what they mean by the amp being "1ohm stable".
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03 F150 on 24's
HU:Pioneer DVD5700
Frt:MC57
Subs:(12)S12L7
Amps:(3)KX2500.1's, MC-2004
Replies:
Posted By: customsuburb
Date Posted: June 16, 2004 at 3:39 PM
What is the ohm rating of your subs and are they dual voice coil or single voice coil?
Posted By: DYohn
Date Posted: June 16, 2004 at 3:39 PM
For best results with that amp, you want your subs connected for a total 2-ohm load. This will deliver 300 watts to each speaker. "1-ohm stable" means the amp can sustain output into a 1-ohm load. This amp CAN do that, however it can be very noisy and the THD ratings and damping factor gets tossed out the window, so your subs could be over-driven. ------------- Support the12volt.com
Posted By: AJRXtreme
Date Posted: June 16, 2004 at 3:55 PM
the ohm rating on my subs are dual 4 ohm voice coils.
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03 F150 on 24's
HU:Pioneer DVD5700
Frt:MC57
Subs:(12)S12L7
Amps:(3)KX2500.1's, MC-2004
Posted By: DYohn
Date Posted: June 16, 2004 at 4:10 PM
Ah, well then you're screwed as far as getting a total 2-ohm load. You can connect for a 1-ohm load (all voice coils in parallel to the amp) and then as long as you are careful with the setup and don't jam volume control to max, the JBL amp will survive and produce (I believe) about 820 watts. It certainly won't sound it's best though. Or you could go for a total 4-ohm load (series-parallel) and the amp will be very happy at 300 watts total. ------------- Support the12volt.com
Posted By: AJRXtreme
Date Posted: June 16, 2004 at 4:26 PM
what do you mean by when it wont sound its best?
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03 F150 on 24's
HU:Pioneer DVD5700
Frt:MC57
Subs:(12)S12L7
Amps:(3)KX2500.1's, MC-2004
Posted By: kfr01
Date Posted: June 16, 2004 at 4:37 PM
He means there will be uwanted noise and distortion in the system. Noise and distortion wear on speakers and you could break them. I wouldn't suggest a 1-ohm load, even if they don't break you'll probably be able to hear the distortion and you don't want that. Try the 4ohm load first. It will probably be plently loud unless you're looking for spl or to beat your friend or something. What is the application again, ported, bandpass? If either of those the power handling will be reduced for the subs anyway.
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New Project: 2003 Pathfinder
Posted By: AJRXtreme
Date Posted: June 16, 2004 at 4:41 PM
bandpass, thi  s is a picture of the sub box: ------------- 03 F150 on 24's
HU:Pioneer DVD5700
Frt:MC57
Subs:(12)S12L7
Amps:(3)KX2500.1's, MC-2004
Posted By: DYohn
Date Posted: June 16, 2004 at 4:49 PM
I definately would not try to run that thing at 1-ohm! Conenct it for 4-ohms (series-parallel) and hope for the best. ------------- Support the12volt.com
Posted By: AJRXtreme
Date Posted: June 16, 2004 at 4:52 PM
ok thankyou!!!1 ------------- 03 F150 on 24's
HU:Pioneer DVD5700
Frt:MC57
Subs:(12)S12L7
Amps:(3)KX2500.1's, MC-2004
Posted By: AJRXtreme
Date Posted: June 16, 2004 at 5:10 PM
so 2 ohms on each sub and then 2 ohms on the amp? ------------- 03 F150 on 24's
HU:Pioneer DVD5700
Frt:MC57
Subs:(12)S12L7
Amps:(3)KX2500.1's, MC-2004
Posted By: customsuburb
Date Posted: June 16, 2004 at 5:28 PM
Wire them like this: 
Posted By: AJRXtreme
Date Posted: June 16, 2004 at 5:28 PM
is the amp going to be set at 4 ohms or 1 ohms?
-------------
03 F150 on 24's
HU:Pioneer DVD5700
Frt:MC57
Subs:(12)S12L7
Amps:(3)KX2500.1's, MC-2004
Posted By: AJRXtreme
Date Posted: June 16, 2004 at 5:31 PM
each sub has 8 wire holes(4 positives and 4 negetives), so i couldnt wire them like the picture
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03 F150 on 24's
HU:Pioneer DVD5700
Frt:MC57
Subs:(12)S12L7
Amps:(3)KX2500.1's, MC-2004
Posted By: stevdart
Date Posted: June 16, 2004 at 5:36 PM
Each set of holes is there to facilitate connected one sub to another sub. Think of them as 4 double holes. That allows you to get the speaker wire loaded in. You won't use all the holes. Use the diagram above, you will use the double holes on the speaker to the left...one pos wire will go out to the second sub, and another pos wire will go to the amp. Same thing with the neg wires. So you are only going to use two of the double holes.
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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
Posted By: AJRXtreme
Date Posted: June 16, 2004 at 5:37 PM
ohh ok
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03 F150 on 24's
HU:Pioneer DVD5700
Frt:MC57
Subs:(12)S12L7
Amps:(3)KX2500.1's, MC-2004
Posted By: AJRXtreme
Date Posted: June 16, 2004 at 5:39 PM
does it matter which negetive and positive hole i use?
-------------
03 F150 on 24's
HU:Pioneer DVD5700
Frt:MC57
Subs:(12)S12L7
Amps:(3)KX2500.1's, MC-2004
Posted By: stevdart
Date Posted: June 16, 2004 at 5:41 PM
No, they are connected to each other.
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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
Posted By: AJRXtreme
Date Posted: June 16, 2004 at 5:45 PM
but what about wiring the subs to the box. I have 2 holes on each side of the box for wires.
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03 F150 on 24's
HU:Pioneer DVD5700
Frt:MC57
Subs:(12)S12L7
Amps:(3)KX2500.1's, MC-2004
Posted By: stevdart
Date Posted: June 16, 2004 at 5:52 PM
Use one set, and leave the other set unused. Use whichever side will be closest to the amp.
-------------
Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
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