No Output @ 4ohms Bridged

[qu1cks1lver56]

so my buddy came over today and he wanted me to hook his 2 12" power acoustik subs up bridged.

so i wired them in parallel (right?) to get a load of 4 ohms total.

theyre dual 4 ohm coils.

but when i hooked them up bridged to the amp, i got no output.

1st time i tried it it blew the fuse in the amp.

so i turned the gain all the way down and then put a new fuse in a tried it again.

it didnt blow the fuse but i never got any output even at almost wide open gain.

the amp is a kenwood 1000watt 2 channel.

and its supposed to be 4 ohm stable bridged.

but idk why it didnt work

[duct_tape123]

So you series'd the individual subs, then parallel'd the pair of them? If so thats right. But if not your sitting at 1 ohm. When you blew the fuse the 1st time you might have messed something up. Amp may be a goner.

Edited September 3, 2008 by duct_tape123

[01 S-10]

so my buddy came over today and he wanted me to hook his 2 12" power acoustik subs up bridged.

so i wired them in parallel (right?) to get a load of 4 ohms total.

theyre dual 4 ohm coils.

but when i hooked them up bridged to the amp, i got no output.

1st time i tried it it blew the fuse in the amp.

so i turned the gain all the way down and then put a new fuse in a tried it again.

it didnt blow the fuse but i never got any output even at almost wide open gain.

the amp is a kenwood 1000watt 2 channel.

and its supposed to be 4 ohm stable bridged.

but idk why it didnt work

If you wired them in parallel thats a 1ohm load. Not good for that amp!!!

[IH8PunkRok]

as said above if u wired them parallel then ur amp may be screwed

[audiofanaticz]

sounds like the other posters covered it already.

You have to do what ducttape said to run the amp at a safe ohm load.

If you just bridged the amp and hooked it up, and thats when you fried the fuse, you most likely fried the powersupply on the amp too since it can not handle the needed current draw at 1 ohm.

Also another thing you can check is did you properly bridge the amp. Some amps, not all amps need to be bridged differently. Some are left positive right negative to bridge, and others are left negative and right positive, which is the complete oppisite.

Did you look at the amp and see if there is a mono/stereo switch that needs to be switched to run it bridged? Some amps have that too.

[qu1cks1lver56]

i wired them like this.

and it shouldve worked but it didnt

not sure whats its called but i thought it was called parallel.

i hooked it back up the way he had it and it worked fine.

its like this per channel now

he said he tried hooking them up like this

and it popped the fuse instantly.

so idk maybe he messed it up when he tried that and it just wont work bridged now?

[qu1cks1lver56]

sounds like the other posters covered it already.

You have to do what ducttape said to run the amp at a safe ohm load.

If you just bridged the amp and hooked it up, and thats when you fried the fuse, you most likely fried the powersupply on the amp too since it can not handle the needed current draw at 1 ohm.

Also another thing you can check is did you properly bridge the amp. Some amps, not all amps need to be bridged differently. Some are left positive right negative to bridge, and others are left negative and right positive, which is the complete oppisite.

Did you look at the amp and see if there is a mono/stereo switch that needs to be switched to run it bridged? Some amps have that too.

i had it bridged properly, it had the line going to each terminal that makes it bridged, and i hooked it up to them.

but i didnt look for a switch, i didnt know such a thing existed on certain amps.

ill look at it again tomorrow.

[Boon]

Doing this:

Would seriously damage the amp if the fuse didn't pop. That's giving each channel a 0.5 ohm load which isn't at all good for it.

Sounds like you may have accidently wired it up the same... check your wiring and try again?

[audiofanaticz]

i had it bridged properly, it had the line going to each terminal that makes it bridged, and i hooked it up to them.

but i didnt look for a switch, i didnt know such a thing existed on certain amps.

ill look at it again tomorrow.

Yea, only some cheaper amps, or lower model amps from trustworthy companies have it. Its usally just a push button or a 2 way selectable switch. Or like i said to bridge that amp it might be a little different, but usally its the cheaper companys that do it differently too bro.

[audiofanaticz]

Like i said, i dont know what model number the amp is, dont think you listed it.

But look at this one

http://www.sonicelectronix.com/item_8514_K...+KAC-7203.html#

click the picture to enlarge

http://www.sonicelectronix.com/pictures.php?id=8514

Its the 2nd picture from the bottom, its a top view of the amp with the cover off, and it says operation mode, mono stereo. flip the switch when you bridge it.