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Bridging rear outputs of a HU

Old Sep 2, 2010 | 05:11 PM
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Bridging rear outputs of a HU

Hey. Is it a good idea to bridge the rear outputs of a HU to connect it to one 8ohm SVC mid bass driver? (I don't want to destroy the HU)
Old Sep 2, 2010 | 05:14 PM
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NO it will go up in smoke faster then a joint around cheech and chong!
Old Sep 2, 2010 | 05:14 PM
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I wouldn't... I tried that many years ago and it blew the rear outputs. It worked for a bit, but died in like 20 minutes.
Old Sep 2, 2010 | 05:23 PM
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Originally Posted by avidedtr
NO it will go up in smoke faster then a joint around cheech and chong!
Bro... you kill me!! lmfao
Old Sep 2, 2010 | 08:30 PM
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Originally Posted by LaZyLuke
Hey. Is it a good idea to bridge the rear outputs of a HU to connect it to one 8ohm SVC mid bass driver? (I don't want to destroy the HU)
No. They are already bridged (BTL outputs).
Old Sep 3, 2010 | 03:24 PM
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Originally Posted by kevmurray
No. They are already bridged (BTL outputs).
So I am not an expert at this but then that will mean I can bridge it using one channel Positive terminal and the other negative:

(+)::::;(-)---(+)::::;(-) [assuming that what BTL looks like] then:
[rear right] [rear left]


(+)::::;(-)--(+):::::;(-)
|::::::::::::::::::::::::|
|::::::::::::::::::::::::|
--------8ohm----------

that should double the volt output... and 8 ohm should not cause underload issues and the output will become mono (I know that's how it works on certain amplifiers)....Am i wrong?


P.s:

:::::::- this denotes empty space, apparently you cannot put multiple spaces on this forum as it would be recognized as one space... I hope the diagram makes sense

Last edited by LaZyLuke; Sep 3, 2010 at 03:30 PM.
Old Sep 3, 2010 | 03:29 PM
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Don't do it.
Old Sep 3, 2010 | 03:31 PM
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Originally Posted by kevmurray
No. They are already bridged (BTL outputs).
Originally Posted by LaZyLuke
So I am not an expert at this but then that will mean I can bridge it using one channel Positive terminal and the other negative:

(+)::::;(-)---(+)::::;(-) [assuming that what BTL looks like] then:
[rear right] [rear left]


(+)::::;(-)--(+):::::;(-)
|::::::::::::::::::::::::|
|::::::::::::::::::::::::|
--------8ohm----------

that should double the volt output... and 8 ohm should not cause underload issues and the output will become mono (I know that's how it works on certain amplifiers)....Am i wrong?


P.s:

:::::::- this denotes empty space, apparently you cannot put multiple spaces on this forum as it would be recognized as one space... I hope the diagram makes sense

I guess you missed this part...
Old Sep 3, 2010 | 04:23 PM
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Originally Posted by DeadlySones
I guess you missed this part...
No I didn't miss it- BTL outputs are usually meant for bridging that's why it didn't make sense to me! ... The who idea of BTL is to be able to bridge the two to a mono channel- or am I totally lost here....

Also since the bridging seems to be a totally bad idea... will it be ok to use only one channel?

I am currently using 2 front ones at 6ohm and then i have that lil mid i want to try out so maybe it would be ok to connect it to ONE of the rears? What you guys think? (using an external amp will definitely will be an overkill for this guy).
Old Sep 3, 2010 | 05:50 PM
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Originally Posted by LaZyLuke
No I didn't miss it- BTL outputs are usually meant for bridging that's why it didn't make sense to me! ... The who idea of BTL is to be able to bridge the two to a mono channel- or am I totally lost here....

Also since the bridging seems to be a totally bad idea... will it be ok to use only one channel?

I am currently using 2 front ones at 6ohm and then i have that lil mid i want to try out so maybe it would be ok to connect it to ONE of the rears? What you guys think? (using an external amp will definitely will be an overkill for this guy).
BTL means Bridge Tied Load. There are actually two bridged amps per channel inside the head unit and so you can't bridge them again. If you did you would only get the voltage difference between them. This is how we get "high power decks".

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