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Bridging my amp for subs. May be a dumb question, but oh well.

 

Silver Member
Username: Invain

Michigan United States

Post Number: 248
Registered: Aug-04
Ok, supposedly my crappy 100x4 watt amp is not bridgeable, but I was wondering what exactly would happen if I did bridge 2 channels on each side so I have 200x2? I doesn't say it's bridgeable, but I am really curious why it isn't, because I don't see many that aren't, and what would happen if I did bridge it?
 

Anonymous
 
you could try it some times it just wont work and somtimes it just blows your amp and some times it sounds like crap
 

Silver Member
Username: Invain

Michigan United States

Post Number: 253
Registered: Aug-04
OK. Thanks.
 

Gold Member
Username: Glasswolf

NorthWest, Michigan USA

Post Number: 4502
Registered: Dec-03
you'd fry the amp, yes.
when you bridge an amp, you invert the signal on one of a pair of channels, so the sine wave is reversed for one channel of the pair.
this has to be done by pushing in a button, or flipping a switch.
if you can't invert a channel, you can't bridge teh amp.

if you join two channels (left front and rear) together on one speaker, you'll short out the amplifier.

more on bridging:
http://www.bcae1.com/bridging.htm
 

Silver Member
Username: Audiobahn_man

Freakmont, MI

Post Number: 170
Registered: Aug-04
I have a sony 1200watt amp is it bridgeable?
http://www.xplodsony.com/products/?CATEGORY=Amp/EQ&MD=XM-2200GTX
 

Gold Member
Username: Glasswolf

NorthWest, Michigan USA

Post Number: 4509
Registered: Dec-03
its not 1200 watts, just to be clear.
that's peak rating.
real RMS is:
"200W x 2 RMS into 4 ohms"

"Speaker impedance -- 2 - 8 ohms (stereo)
Speaker impedance -- 4 - 8 ohms (when used as a bridging amplifier)"

yes it supports bridged mode.
it'd put out 800 watts RMS @ 4 ohms bridged, theoretically.
actually, closer to 600 watts RMS, since you lose some power to heat and inefficiency when decreasing impedance.
 

Silver Member
Username: Insearchofbass

Post Number: 870
Registered: Jun-04
500W x 1 RMS into 4 ohms, 20Hz - 20kHz @ 0.15% THD

yes
 

Silver Member
Username: Insearchofbass

Post Number: 871
Registered: Jun-04
i copies from his link he gave and again i post the same time as you glass
 

Gold Member
Username: Glasswolf

NorthWest, Michigan USA

Post Number: 4515
Registered: Dec-03
ah ok I just skimmed the page. I didn't see the bridged output rating.
hey my guess was close though! hehe
 

Silver Member
Username: Audiobahn_man

Freakmont, MI

Post Number: 171
Registered: Aug-04
ok, so would it run at 2 omhs bridged?? should i try it?I wouold be running 2 v-max 12''s off it in a 4.7 cubic foot box tuned to 32 Hz?How would i wire it?
 

Gold Member
Username: Glasswolf

NorthWest, Michigan USA

Post Number: 4536
Registered: Dec-03
no.
if it's stable to 2 ohms stereo, it'll see half that load bridged, so only stable to 4 ohms.

2 ohms bridged is like 1 ohm stereo
 

Silver Member
Username: Audiobahn_man

Freakmont, MI

Post Number: 173
Registered: Aug-04
yea, i ran it at 1 ohm with my audiobahns and it got so hot after 5 min ya couldnt touch it so i wont bridge it
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