active crossover freqncy for Totem Mani2

I would talk to Totem. I don't have experience with the Totems,but the Dyn woofer has a peak and dip that has been taken care of in compensation circuitry. My guess is that Totem crossed this around 2k or even lower. Without compensation circuitry, I believe if you just put this system active without educating yourself on the drivers, you might be upset with the results.
Anyone familiar with these speakers to chime in?

Thanks Timlub.

Totem doesn't recommend the use of external crossovers for optimal performance.

Totem also mentioned if I wish to bi-amp they recommend doing it passively and letting the crossover use the natural filters.

I don't really know what that means and also my amplifier does not support bi-amp of bridge mode. What I should do?

It's not clear if the reason you want to use an external crossover is for the purpose of biamping. If it's not, I can't imagine you could improve on the performance over Totem's internal crossover.

If you want to bi amp speakers you need 2 stereo amps (or 4 mono amps, or one 4 channel amp). I suggest you do some research on bi amping - there are plenty of threads in the archives on this.

Passive bi amping simply connects one amp channel to the woofer posts, another to the tweeter posts. The internal crossover handles the filtering. There are 2 ways to do this - 1) Vertical bi amp places 2 identical amps on each speaker - the preamp signal is split to each channel, and one channel powers the tweeter, the other the woofer. 2) Horizontal bi amping can use non-identical amps but they need to have a volume pot so you can ensure volume is balanced. In this configuration, one amp (the highest power amp) powers the woofer, the other powers the tweeter.

Be SURE that you remove the jumpers that connect the hi/lo binding posts.

If you want more advice - it would help if you post more info about the amps you're using and exactly what you are striving for . . .