2. speakers
  3. 1248265624

bi-amping and effect on cross over

I am trying to understand the effect bi-amping a speaker will have on the designed specs of how a cross over should work. Dynaudio, for instance, does not offer up dual(or triple) binding posts because they feel bi-amping would negatively effect the way their cross over is designed to work.

with my simple knowledge of the way a speaker crossover works, it sort of makes sense to me that the speaker should "see" one amp connection and then shift highs and lows to tweeter/mid and woofer as needed. I am sure i am missing an understanding of how a crossover can compensate for bi-amping (and give the same designed crossover slope/effect but with more current to each driver). Would love some clarity. thanks.
Ag insider logo xs@2xdangelod

Showing 1 response by bombaywalla

bombaywalla's avatar
bombaywalla
1,958 posts
 
From limited experience I have noticed that x-overs use both large C & L values. In those manuf that do not believe in biamping &/or biwiring, these manuf have used the combination of the large L & C value to effectively resonante each other out so that, at the input to the speaker, the amplifier sees a (mostly) resistive load.
Now, if you split the low & high x-over ckts, the large L no longer sees the large C & the large C no longer sees the large L. Thus, in the bass region the amp has to drive a large L & in the highs the amp has to drive a large C. Both of these conditions could render the amp unstable & the speaker manuf would rather avoid this situation.
More to discover