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Why does bi-amping speakers sound better?

Curious why it sounds better to bi amp speakers vs just running them off one amp?

i am trying to figure out which amp to buy, I am on the fence with bi amp or not.  Speakers are the old infinity kappa 8.1's.  Several years ago when I was married I bi amped my speakers so each speaker was seeing two channels from a parasound hca1500, I think that's the model.... 200w x 2 going to each speaker.  I also tried a single amp powering both speakers so each speaker was seeing 200w x 1.  

is it that I simply doubled the power that resulted in better sound, mostly noticed the low end of the speakers was tighter, more powerful etc.... and obviously I could also play louder.  

Or is is there something about letting one amp not work as hard due to only running high frequencies while the other amp gets to just work on the low end.  

I am 90% sure which brand of amp I want to get, just trying to figure out if I should bi amp or not.

as a example should I go with

two 2 channel amps at 400w x 2 so each speaker would get 400x2

or should I go with a single 800w stereo amp so each speaker sees the same 800w, just with one channel of a amp



128x128viggen900
viggen900's avatar
viggen900 OP
64 posts
 
i went up into the attic to look at the power panel, I was curious how easy it will be to bring a 20a or two service into my front room and also my bedroom.  It looks like I have several opening to run more power, I counted eight available slots so I should be good.

i also do not think it will be to difficult to run the new power wires into the rooms, being a old house they aren't the standard 2x4 construction but 18+ inches of brick, rocks etc.  Thus the power cables will not go through the wall but on the wall where I can see it in the room, that's how the present wiring is (has a aluminum covering).  I think the access from attic to room shouldn't be to bad.  




lowtubes
100 posts
 
In my experience, bi-amping has not made my systems sound better other than improving bass performance. Bass can be cleaned up or controlled with bi-amping or the midrange and top can be improved with the adding of power of bi-amping but I feel the system will sound more complete and whole when it is run on a single amp that has enough power for the speakers. 
viggen900's avatar
viggen900 OP
64 posts
 
Well...  being a old house I needed some plumbing work done,  toilet swap, faucets, garbage disposal and shower controls.... I was worried a little job would become big if I did it myself.  Long story short it did still become a major job, found several leaking fitting behind drywall in not so easy places which resulted tiles are falling off around the PINK bathtub...l thus my buy amp now money is need a shower/redo bathroom money,


unsound
7,329 posts
 
Bi-amping can allow some amplifiers to maintain their Class A bias longer.
gdnrbob
4,444 posts
 
@viggen900 
I feel your pain, but an old house has more character than a new one.
Hopefully, eventually, you will get to the wiring. And, as you said, it should be an easy upgrade.
 If code permits, and you can run new wiring without needing conduit, it should be a slam/dunk. I posted a thread a couple months ago regarding a whole house surge protector. If you do get around to re-wiring, I encourage you to consider adding one. They don't cost much and can give you some piece of mind, as being one layer of protection.
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