Help me understand please

[jrdbrn 10+ year member]

I have a JL Audio 12w3v3-2

It is 2 ohms. Say I get a 2 channel amp that pushes 275w x 2 @ 2 ohms or 600w x 1 @ 4 ohms bridged.

If I hook up a bridged amp at 4 ohms to my 12 w/ 2 ohms, what happens? I am just not sure heh

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[thaster 10+ year member]

it will work

 

[jrdbrn 10+ year member]

it will work

Thanks to your valuable insight to helping me understand nothing

 

[blackbonnie 5,000+ posts]

it will work

NO...it will not work, maybe for a couple seconds but your amp will go into protect because it is not stable at 2 ohms in bridged mode

 

[youngcoke]

for subs its better to use a mono block amp

 

[dman4486 5,000+ posts]

if the amp can only do bridged 4ohm, then you would quickly overheat the amp and it would go into protect.....if you wired the sub to one channel, then it would get 275wrms

 

[blackbonnie 5,000+ posts]

for subs its better to use a mono block amp

again NO, not always

 

[dman4486 5,000+ posts]

again NO, not always

I love the misinformed misinforming the uninformed:laugh:

 

[blackbonnie 5,000+ posts]

I love the misinformed misinforming the uninformed:laugh:

x2

 

[morgans432 10+ year member]

I love the misinformed misinforming the uninformed:laugh:

haha its always great to see

 

[thaster 10+ year member]

wait is this a DVC? if not my bad with the misinformation about 2 ohms to 4 ohms etc....

 

[dman4486 5,000+ posts]

w3v3's are svc

 

[blackbonnie 5,000+ posts]

svc hence the -2

 

[PaulD 10+ year member]

to better answer the OP's question, what happens when you bridge the outputs of a 2 channel amp is that each channel only effectively sees 1/2 of the total impedance you place across the bridged amp pair. So if you bridge an amp and place a 2 ohm sub on it, each channel will think it's playing into a 1 ohm load ...... some amps can handle that (even if they are only rated at 2 ohms per channel) and some can't. As stated above, it will become immediately obvious if you're amp can't - because the protection circuit will cut in.

As for the monoblock comment, what he was getting at is - most class D monoblocks are designed to drive 1 ohm loads.

 

[dman4486 5,000+ posts]

to better answer the OP's question, what happens when you bridge the outputs of a 2 channel amp is that each channel only effectively sees 1/2 of the total impedance you place across the bridged amp pair. So if you bridge an amp and place a 2 ohm sub on it, each channel will think it's playing into a 1 ohm load ...... some amps can handle that (even if they are only rated at 2 ohms per channel) and some can't. As stated above, it will become immediately obvious if you're amp can't - because the protection circuit will cut in.
As for the monoblock comment, what he was getting at is - most class D monoblocks are designed to drive 1 ohm loads.

wrong....some class d's are not 1ohm stable