Bi Amping

[efm80 10+ year member]

so I have heard about components being bi-ampable. So what are the benefits of that? You can power the mid and tweeter seperately?? So lets say you have a (75*4) 4 channel amp and you have bi-ampable components then you will send 75w each to the tweets and 75w each to the mids, correct??? And then I ask what If you have a 2 channel amp that is 150w*2 and you send that to your components isn't that the same(75 to tweets and 75 to mids)???? so whats the advantage to bi-amping?

eddie

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[bass-aholic 10+ year member]

im guessing you will be able to tune the tweets to how you want and then the mids to how you want rather than having them bolth being tuned at the same time and sounding like ***

 

[Biggy 10+ year member]

ive used bi amping quite a while

tweeters on a ppi tube amp

mids on a 2300am

best system ive ever had

still regret that i sold it

 

[thch 10+ year member]

biamping has two contexts:

1.) using one amp per speaker and moving the crossover into pre-amplifier processing (DSP or active filters). this allows for other effects like per-speaker time delay.

2.) using one amp per speaker but using a crossover with two inputs. this has less advantages, but provides minor benefits. (amplifiers can be selected for each speaker. there are no issues with wire resistance based crosstalk. any nonlinear effects the speaker has on the amplifier are isolated from the other speaker.) The degree to which this plays a part is again more apparent when you have things like tube amps.

in either case, I would stick with the same size amp for one channel as two channels. the reason being that peak power output requirements may not change significantly when biamping. Just because peak power may be misrepresented does not mean that an accurate peak power metric would not be useful in some cases.

 

[efm80 10+ year member]

biamping has two contexts:1.) using one amp per speaker and moving the crossover into pre-amplifier processing (DSP or active filters). this allows for other effects like per-speaker time delay.

2.) using one amp per speaker but using a crossover with two inputs. this has less advantages, but provides minor benefits. (amplifiers can be selected for each speaker. there are no issues with wire resistance based crosstalk. any nonlinear effects the speaker has on the amplifier are isolated from the other speaker.) The degree to which this plays a part is again more apparent when you have things like tube amps.

in either case, I would stick with the same size amp for one channel as two channels. the reason being that peak power output requirements may not change significantly when biamping. Just because peak power may be misrepresented does not mean that an accurate peak power metric would not be useful in some cases.

thanks bro. So if I bought bi-ampable speakers should I get a 4 channel amp(75*4) then??? Or just buy a 2 channel amp of twice the power(150*2) and not bi-amp them?? what would be and sound better, thanks!!

eddie

 

[fasfocus00 5,000+ posts]

you will be able to tune a bi-amp component set better.

I'm currently running my quarts bi-amped with a 4 channel (85x4).

 

[thch 10+ year member]

my best estimate would be for the 75x4. typically such amplifiers would be bridgable to 150x2 @ 4ohm, while the 150x2 (@ 2ohm) would probably be 75x2 @ 4ohm. further, 4channel amps tend to be very portable and useful across multiple setups as you always need to power 2 to 4 speakers.

the ability to actually bi-amp is available, in both active and passive methods. signal processing can be applied to each speaker seperately, with time delay being a feasible use to correct for the distance difference between your ear and the tweeter, and your ear and the midwoofer.

you could also apply a second filter to the mid/tweeter to reduce out of band signals further. i would suggest tuning such filters somewhat distant from the component's passive crossover frequency, to avoid affecting it.

because of the peak-power benefits, running the speakers bridged may provide some benefit, though it may not be noticable. my suggestion is to run wires for biamping, then try both configurations.

 

[Immacomputer 10+ year member]

Bi amping can really help balance the mids to the tweeters easily too. Or at least you can balance them to your taste. In my car, running the tweeters with a passive component set with the mids on one amp made for a lack of midbass and an overly bright tweeter. Running the same slopes but with different levels for the midbass and tweeter, I got a much better sounding spectrum. This could be a benefit or it could not if the levels are fine as they are.

 

[chucku 10+ year member]

If you look at my sig, I have 75 going to my mids and 45 going to my tweets. Tweeters dont need as much power as mids, so if possible use a separate amp for them so as not to waste money or power on them. Bi amping or running active really makes speakers come alive, but make shure you properly deaden your doors or it wont be fully realized.

 

[JeffM 10+ year member]

Do Bi-amping make speakers sound better compared to just sending alot of power in passive to them?