Hmm, I see, sorry for my mis understanding. BTW, I have Eltax Symphony 7 (which I can't ever seem to find anything about on the internet)
If this is true (maybe my car audio mind is clouding my home cinema mind) why have four inputs at the back of the speaker!? Why not just have two from the amp and two at the speaker and let the crossovers on the speaker (i presume the woofer) deal with splitting the signal.
In car audio, you pull a +ve and -ve cable (just two) from the HU/AMP and run them to a seperate crossover where the signal is then split and you end up with four cables one set for woofer and one for tweeter.
If you have speakers with the crossovers built on to them, you still have one set of cable coming to the speaker, and the tweeter is connected to the woofer by its own cable at the crossover (mounted on the woofer). So what does bi-wiring actually achieve if you have crossovers built on to the speakers!?
The only other set up that i've used these speakers with is with a Sony Amp (non bi-wireable) although its what I call an AV amp as opposed to a pure Audio amp, it sounded complete pants, with the speaker posts in place on the four terminals, there was clearly no definition between high and low, and a muffled appearance to the sound.