Question of stability :)

jackb · Post by **jackb** » Wed Feb 07, 2007 9:15 pm

These ohms again

Ok I have an Xtant 2200ix that’s 2 channel amp rated at 100X2 @ 4Ohms and 200X2 @2Ohms. Which means that bridged it will give 400W @4Ohms

My G/F was very nice to me and offered me 2 Focals 27H subs , problem is they’re 4Ohm SVC so that means either to wire my box at 2 or 8 Ohms.

My amp is not rated to play bridged at 2 Ohms but would it in theory put out 800W @ 2 Ohms and 200 @ 8Ohms?

The amp would probably heat up a lot playing at 2Ohms but what if the gains where no more than Halfway ( I do not need 800W on these speakers)

subster87 · Post by **subster87** » Thu Feb 08, 2007 9:54 pm

Lol well everyone on here will say thats not what its designed to do. And its NOT!!! Now that being said, if you have money for a new amp in the future.. you could get away with it for now..... That is what i would do, but its by no means smart to do. It will heat up and has a good chance of going into protect from either heat or low ohm. But id try it... lol great advice right? give the facts and then go against them

Jszar · Post by **Jszar** » Fri Feb 09, 2007 8:11 am

subster87, good comment. Bridged amps produce a lot more heat, heat is bad for amps. It will burn out before you gt your money's worth. I'd invest in a proper amp, meanwhile just leave the subs on their own channel. Then sell the old amp to help offset the cost of the more powerful one.

solacedagony · Post by **solacedagony** » Fri Feb 09, 2007 9:28 am

If the amp isn't 2 ohm capable and you hook it up to that, you very well could toast the amp. However, it'll probably have a protection circuit which will not let the amp even turn on.

Post by **GlassWolf** » Fri Feb 09, 2007 9:26 pm

get a second amp for the other sub, trade your present amp for a monoblock class D amp, or run a single sub on the bridged amp and see if that's enough for you.

Post by **GlassWolf** » Fri Feb 09, 2007 9:28 pm

Jszar wrote:subster87, good comment. Bridged amps produce a lot more heat, heat is bad for amps. It will burn out before you gt your money's worth. I'd invest in a proper amp, meanwhile just leave the subs on their own channel. Then sell the old amp to help offset the cost of the more powerful one.

err, a bridged amp won't produce any more heat at 4 ohms, than it would at 2 ohms stereo. Same output, same heat.

Amps are only stable to twice the load bridged as in stereo, because the output is the same for both.
Amplifiers don't produce any more power when bridged, they just produce their peak output at a higher impedance.