Is SQ adversely affected when bridging vs. simply running an amp in stereo. Lets say I had two amps, bridge them both and put one on each channel. Will there be a significant difference between that and a similarly powered 2 channel? (100 watts bridged vs. 100 watts per channel)
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nope. ussualy the difference is .01%THD vs .1%THD neither are audible.
there is no magic in bridging. you are just taking the left channel and summing it with right channel (inverted). the sum of the 2 channels gives you a theoretical 2X power than the 2 channels do by themselves. (this has to do with how it loads more than anything.) in reality you will get 1.5x-1.8x . That summing effect also magnified the THD, since you are getting both channel THD into one channel.
Original post whore!
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u r going to get vastly differing opinions on this.
i have met people who swear both ways...some refuse to ever bridge due to the increase THD, though as mentioned it is doubtful that a human ear can pick it up, however, we often make other decisions based on other similar differences, perhaps the better question is if you had two amps, one is rated at 1%THD and one at .01 or .001THD, but the former is 30 percent cheaper, produces 30 percent more power. (often the case of a medium 4 channel bridged versus a big two channel)...which would you choose?
on the flipside, i know people who loves bridging because they claim better headroom and better stereo separation. of course dependant on amps as above...but thats their take when talking about quality gear.
to me, if there is a two channel of sufficient power, size and price that fits the bill, i usually use it, or better, a dual mono. but if not, i dont hesitate to bridge.
i have really yet to hear a difference..my own car for example, usea a 4 channel bridged to send 250 watts to each midbass.
i think personally, if you use top shelf gear, you will be fine with either method.
When I was competing I took my 4ch amp from running tweets and mids using internal x/o's to using the passives and bridged and on the whole everything got better simply because the head room went up. I felt that placement was better and I noticed that my tweeters didn't distort as easily because I could keep my gains lower.
I know the Mcintosh MCC404 bridged is .007% THD vs .005% unbridged and that is at rated power from 250 milliwatts to rated power. I guess it depends on the quality of amp you chose.
I'm fairly competent in the understanding of these things but I fail to understand how .005+.005=.007
Yall understand that you are adding to channels correct, literally.
Now given that noise is random and the channels are out of polarity to bridge one could argue that some will cancel out... bit no less than half of one channel which still equates to .0075
Now lets take a head-count of who can hear the difference? between .005, .007, and .01
Mcintosh states that running their amp bridged provides a more powerful stereo reproduction with two full frequency range 400 watt amplifiers. MCC404M/404 model for example.
Mcintosh states that running their amp bridged provides a more powerful stereo reproduction with two full frequency range 400 watt amplifiers. MCC404M/404 model for example.
Would this be true for a 4 channel amp...or for two completely separate amps?
Pioneer DEH-80PRS - Active, JL HD 600/4 on Focal Power 165 KR2, JL HD 750/1 on JL Tundra Stealthbox 10w3v3-2, Stinger connects, JL Amp kit, Hushmat floors and doors.
Mcintosh states that running their amp bridged provides a more powerful stereo reproduction with two full frequency range 400 watt amplifiers. MCC404M/404 model for example.
if that's the case then they are admitting to shitty crosstalk which is rather rare n modern amplifiers
Here's a hint, don't believe everything an audio manufacturer's marketing department tells you.
In other words, you're fuken-A right it sounds better, you spent twice as much money with them
In my old Civic coupe, I ran one amp bridged per door on the components run passive. I'd be willing to bet that any distortion I heard was from the speakers themselves versus the amplifier doubling in distortion by bridging. I went from 60x2 to a conservative 240x1 per door.
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Mcintosh seem to be pretty darn good at building amps. I'm sure the amps they design and build do exatcly what they state. The question becomes does it really matter? I would guess that its all unaudiable.
does damping factor drop signifcantly when bridging?
does it matter? once you connect a speaker to an amplifier the dampening factor drops like a rock. if it had a DF of 4 instead of 5, would you hear it?
Original post whore!
Disclaimer:Opinions of the above are the property of the poster
Stock Sync HU |AC LC2i | Phoenix Gold EQ215i | Soundstream SA120 -> ID CD1eMH | JL 300/2 -> ID X65 | JL 500/1 -> (2) 15" Pyle PL1590BL in IB
does it matter? once you connect a speaker to an amplifier the dampening factor drops like a rock. if it had a DF of 4 instead of 5, would you hear it?
The load is part of the DF, it's not the speaker that makes it drop.
DF is the load impedance/output impedance.
Since output impedance doubles in bridged the damping factor is cut in half.
But since DF is as moot as the number of midgets in America divided by the number of gay goats in Australia then... Make your own case.
Bridging vs. Stereo SQ
love it. Let's see how many can hear the difference between 0.5% and 1%. I bet the results are the same
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