"Double" bi-amping a good idea?

As a slight correction to earlier comments, Tekunda's current configuration is not really what is considered bi-amping, rather, it is bridging or monoblocking since one amp drives each speaker full range. This further complicates the impedance issues by effectively halving the already low impedance presented to the amplifier...
That's why my suggestion of putting the amps back to stereo mode and vertical bi-amping makes a whole lot of sense in this case.

I second Plato's vertical bi-amping suggestion -- before you invest any further. Use an (external) electronic crossover b/ween pre & amp, and check out the sound.

Good luck!

Thinking about how many pairs of speaker cable that you will need.It cost you alot of the money for just the cable.
Try Bryston 4b .It may help.Good luck.

I'm not familiar with Martin Logan crossovers, but you may well need to remove all or certain components of your speakers' internal crossover if you go to "active biamping" with an external crossover. Check with the manufacturer and see what they advise.

Good luck ... I haven't done this myself yet, but if you use a good external crossover "active bi-amping is supposed to be an terrific way to go . BIG gains in clarity and effective power from your existing amps.

You are right. I am not bi-amping, but monoblocking right now.
But why must I use an external cross-over when trying your vertical bi-amping suggestion? Could't I use the internal speaker cross over in my speakers, like Martin Logan suggests?
And since I bi-wire my speakers anyway, I would not have to invest in extra speaker cabling.