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help, how do i bridge my amp to run two voice coils on sub 

 

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 Post subject: help, how do i bridge my amp to run two voice coils on sub
Posted: Fri Nov 11, 2005 12:30 pm 
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i did a search and there wasnt anything relavent, i have a 240W 2 channel amp that i want to use to run my sub that has two voice coils, i know the amp can be bridged but how do i setup the wires

the terminals on the amp look like this
first channel second channel
+ - +-

then underneath they have a silkscreen marking like this
+ -

directly below as shown

Please help

Cheers
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Posted: Fri Nov 11, 2005 12:42 pm 
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you should bridge the 2 channels to 1, providing your amp is 2ohm stable. positive to positive on both side and negative to negative on both sides.

hope that makes sense.

 

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Posted: Fri Nov 11, 2005 12:45 pm 
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yep makes sense but what did the silkscreen marking mean and how do i connect these two leads, (pos and neg) to the voilce coils? do i split them back into four leads and run the positive ones to the positive terminals?
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Posted: Fri Nov 11, 2005 12:48 pm 
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the screen underneath just indicates whick positive and negative to use when bridging the 2 channels together, they should point to one neg and one pos.

you just run 2 wires for the pos on the amp, one to each set of terminals on the speaker, and 2 wires from the neg on the amp to the 2 neg terminals on the speaker.

 

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Posted: Fri Nov 11, 2005 12:52 pm 
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cheers for that,
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Posted: Fri Nov 11, 2005 1:26 pm 
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http://www.fordmods.com/forums/documents.php?doc=65

May also aid in your understanding of voice coil configuration and wiring.

 

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Posted: Fri Nov 11, 2005 5:28 pm 
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cheers guys, ive got it wired up and working now but am dissapointed with my 12 inch sub. i now realise i should have gone 10 inch so i think i will get an 8 inch to go with the 12 to give more to the low frequencies rather than just the ultra low ones
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Posted: Fri Nov 11, 2005 8:17 pm 
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Blu Falc wrote:
cheers guys, ive got it wired up and working now but am dissapointed with my 12 inch sub. i now realise i should have gone 10 inch so i think i will get an 8 inch to go with the 12 to give more to the low frequencies rather than just the ultra low ones


How do u mean...why are u disapointed ?

 

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Posted: Fri Nov 11, 2005 9:00 pm 
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only ultra low bass is being pumped out by the sub i was hoping for an all round gain in the bass, normal bass is at the same level, it could be a phasing problem with my 6.5inch rear speakers
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Posted: Fri Nov 11, 2005 9:09 pm 
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what sub did you buy?

 

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Posted: Fri Nov 11, 2005 9:41 pm 
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not sure on model, clarion 500W 12 inch
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Posted: Fri Nov 11, 2005 11:23 pm 
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Blu Falc wrote:
not sure on model, clarion 500W 12 inch


Still dont see why u were disappointed...maybe its still not setup right or in need of a good tune.....aaron (pyroay) is having an spl/sql tuning day if your keen....could be your answer...and i doubt phasing is causing this with your 6.5inch rears since phasing probably isnt occuring at all but with out seeing your setup is hard to comment

Aarons audio day
http://www.fordmods.com/forums/viewtopic.php?t=17435

 

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Posted: Fri Nov 11, 2005 11:24 pm 
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Blu Falc wrote:
not sure on model, clarion 500W 12 inch


Still cant see howd u be disaapointed but hey hard to judge without hearing or seeing your setup..mind be in need of a good tune....this might help

http://www.fordmods.com/forums/viewtopic.php?t=17435

 

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Posted: Sat Nov 12, 2005 11:59 am 
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Happy to have a okk, and i usually have a couple of other spare subs sitting around we can try in the set-up to see some differences.

 

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Posted: Sat Nov 12, 2005 12:59 pm 
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thanks guys but im on the other side or our great land.

The phasing problem would be due to my 6.5's sitting on the rear parcel shelf, the sound coming through the seats created by the rear of the speaker is enough to cancel out the sound being produced by the top of the speaker, this has been confirmed by the quality of the bass being higher when the back had 4 people sitting in it. Im going to be sealing off the back and have the sub facing into the cabin, boxed from behind.
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