Quote Originally Posted by ivica View Post
concerning the original 3145 and later comments from Mr. G Timber
http://www.audioheritage.org/vbullet...l=1#post110075

"....The second problem is the use of a passive crossover between the top of the woofer and the bottom of the 10". Passive crossovers set to frequencies below about 500 Hz react badly with the motional impedance of the woofer/box combination and give substantial gain around 100 Hz. Gain out of a passive system is generally a bad thing. In the case of the High Pass, we have to work the passive network through a really large motional impedance peak resulting from the 10" fundamental resonance in the sub enclosure. This means that the actual voltage drive that occurs at the terminals of the 10" is less than ideal....."

I have tried to get some improvements in 2245/2122 cross-point. From the simulation I have get that using 'Impedance compensation network, and kind of resonance -peak compensation", upper mentioned "lack" of 3145 can be improved, reducing mentioned "100Hz-peak and resonance interference " better then 3dB, but the complexity of the network has rised.
A system of this caliber should have been bi-amp only like the 4340, 4350 and 4355...