HELP: Bridging 2 Ch amp for 1 CVR DVC 4 ohms

[khris]

how can i maximize the power of the Sony amplifier? I bridged the 2 CH amp, apparently the amp can't handle Kicker CompVR Dual 4. So I just used one vocie coil. Help me out on this. below is the specs of the amp. Is this amp stable at bridged Dual 4? thanks

Sony 1200W Bridgeable 2-Channel MOSFET Amplifier with Variable Low-Pass Crossover

Model: XM-2200GTX

1200W peak, 500W RMS x 1 @ 4 ohms, bridged

200 watts RMS x 2 @ 4 ohms

250 watts RMS x 2 @ 2 ohms

Stereo or bridged-mono output; tri-way capable

Selectable 10dB bass boost centered at 40Hz

Preamp and speaker-level inputs

Gold-plated connectors provide reliable signal and power connections

Click to read more...

 

[RandyJ 10+ year member]

You probably wired them in parallel creating a 2ohm load which the amp is not stable at[bridged]. You can however hook each coil up to a channel which would give you 200wrmsX2 creating a total of 400wrms,

 

[cheeseburger35 10+ year member]

or.. what would be better is to wire the sub in series which would be an 8 ohm load and then bridge it.. you'd see 500wrms plus it's alot better than having a coil on each channel.. you don't risk anything..

 

[Twistid 5,000+ posts]

just wire each channel to each voice coil, simple easy and safe

 

[RandyJ 10+ year member]

or.. what would be better is to wire the sub in series which would be an 8 ohm load and then bridge it.. you'd see 500wrms plus it's alot better than having a coil on each channel.. you don't risk anything..

Where do you get the 500wrms from there buddy?

 

[DiamondFanatic 10+ year member]

I would either do what cheeseburger said and series the coils then run the amp bridged, or I would just get an RCA Y if you are running a stereo input so that you only have one of the RCA's for both inputs on the amp, eliminates the chance of a different signal on the channels.

 

[RandyJ 10+ year member]

I would either do what cheeseburger said and series the coils then run the amp bridged.

For a whopping total of probably less than 150wrms per coil??

 

[RandyJ 10+ year member]

And if he uses his sub out, or he tweaks the crossovers and filters right, he wouldnt notice the stereo mode with sub frequencies anyways //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[cheeseburger35 10+ year member]

Where do you get the 500wrms from there buddy?

i mis-read... don't be an ***.. however.. you'll get the same wattage in 8ohm mono as 4 ohm stereo... and it's safer

 

[RandyJ 10+ year member]

i mis-read... don't be an ***.. however.. you'll get the same wattage in 8ohm mono as 4 ohm stereo... and it's safer

No ******* remark intended, sorry you took it that way. How do you know the power at 8ohms mono though? I find it hard to believe you get the same power seeing as how the ratings are:

500W RMS x 1 @ 4 ohms, bridged

200 watts RMS x 2 @ 4 ohms

I highly doubt the design of that amp allows for him to lose only 100w when doubling impedance.

 

[RandyJ 10+ year member]

Could be wrong, my physics is getting rustier by the day but

p=ei

r=e/i

ri=e

p=i^2r

p/r=i^2

sqrt(p/r)=i

sqrt(500/4)=11.180

sqrt(500/8)=7.906

So whilst running the same power but different impedances, this shows he will need to up the voltage at 8ohms to reach the same power, and I doubt he is doing so. So how is he seeing the same power at 8ohms mono as he is at 4ohms stereo, and losing only 100wrms from 4ohm mono?

 

[DiamondFanatic 10+ year member]

And if he uses his sub out, or he tweaks the crossovers and filters right, he wouldnt notice the stereo mode with sub frequencies anyways //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

Sorry, but he never said he had a Sub out. Since he was using a 2 channel amp with a sub I chose to err on the side of him not having a sub out deck.

 

[RandyJ 10+ year member]

Sorry, but he never said he had a Sub out. Since he was using a 2 channel amp with a sub I chose to err on the side of him not having a sub out deck.

Intent well taken. I think though, if he did go with stereo, as said before, eq'd right he would probably not notice the difference unless he was watching a movie or something.

 

[khris]

Hi there! Thanks for the help guys. Is this the right way to connect? what do mean when you say sub out? thanks again

 

[cheeseburger35 10+ year member]

No ******* remark intended, sorry you took it that way. How do you know the power at 8ohms mono though? I find it hard to believe you get the same power seeing as how the ratings are:
500W RMS x 1 @ 4 ohms, bridged

200 watts RMS x 2 @ 4 ohms

I highly doubt the design of that amp allows for him to lose only 100w when doubling impedance.

because you only gain 100 watts when you half the impedance

200x2 @4 ohm

250x2 @2 ohm..