Passive vertical bi-amping with 440 Pro

[Jean-Marie]

Are you folks who bi-amp (or multi-amp) using the Devialet high-pass and low-pass filters or sending a full-range signal to both terminals of your speakers and letting the speaker crossover do that work? I don't understand the technicalities as well as I could, but it would seem more effective to filter before sending the signal.

If you have passive speakers (like most people with Devialets) you should not be doing the crossover in the amps, but leave the speaker to do it.  If you have removed the passive crossover from the speakers then you need to do it in the amps.  Technically it's better to remove the crossover and do the crossover digitally, if you want to modify your speakers and know what you are doing.

If I were in that case, I would try to use digital filtering to avoid dissipating unnecessary power in the analog filter. 

Let’s assume that the crossover frequency is 3000Hz, I would set up the Lows Amp with a low pass cut at 6000 and the High Amp with a high pass cut at 1500Hz. 

The idea being to avoid stacking the slopes of the digital cross over with those of the passive cross over, hence the one octave shift, but still would avoid sending all the bass energy to the highs for the only result to be transformed into heat....


Jean-Marie