Should I bridge a 4 channel amp to 2 channels?

[blktopbig28]

Hey guys.

I have a PPI 5440 5 channel amp. I think the output is as follows:

30 rms x 4
125 rms x 1 (sub)

Recently purchased a pair of Canton QS 6.5" components that's rated 90 rms / 130 max. Should I bridge the 4 channels into 2 (might give me 60 rms???) to power the components and run the rears off the deck? Is there any disadvantage to bridging the 4 channels?

Also looking for a good 10" sub and amp combo. Around $250 if anybody is selling...

[Khalil]

That would definately be a good idea.
You'll have an amazing front sound stage, while mainting good rear fill.

[TEAMFaint]

Just to let know you, underpowering a speaker can also cause damage, so your best bet is to bridge the channels. 90 rms is pretty darn good for some new speakers :D Let us know how they sound after they get amped

[rahim]

i wouldn't recommend it because you will lose stereo sound, most 4ch amps can only be bridged front and rear not left and right

[blktopbig28]

I just found that my PPI amp puts out 120W rms @ 4 ohms when bridged to two channels. You guys are gonna have to excuse my ignorance cause I don't have much knowledge on audio... but would 120W rms be too much for my Canton (90 rms)components?

Are there other disadvantages to bridging? It just seems ubsurd to me that 4 x 30 rms can turn into 2 x 120 rms. Maybe the spec sheet is wrong, but that seems like a might big jump in power. I'm a firm believer that you don't get something for nothing... so is the 120 rms gonna somehow be distorted? or bad for the speakers by making them working to hard?

If anyone knows of a good website that I can learn all this stuff, that would be most helpful.

Thanks.

[Phat_Tercel_YO!]

4 by 30 should turn into 2 by 120.
Actual power might be slightly less due to efficiency drops... but the theory is there.

120 RMS would be about PERFECT for a pair of Canton components.

In fact, buying a 4 channel amp and bridging it onto your front speakers is a very economical way of getting the power in a small chassis.

To retain your balance, simply bridge one set of speakers to the front outputs, and one set to the rear outputs, then run one RCA to the front, and one to the rear, so instead of front and rear outputs, you just turned them into left and right channels.

Technically your THD is going to increase slightly.
If YOU could hear the difference, you gotta have super ears as it will still be well under 1%.

[rahim]

Originally posted by Phat_Tercel_YO!

To retain your balance, simply bridge one set of speakers to the front outputs, and one set to the rear outputs, then run one RCA to the front, and one to the rear, so instead of front and rear outputs, you just turned them into left and right channels.

didn't think of that

[blktopbig28]

Thanks guys,

I really appreciate your inputs. In your opinion, would it be worth it to invest in good (expensive) wiring?