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Stephano Two good ears has put a post on his site about his new 4 way passive xover.

I think this is a better direction than the digital xo.  The designer, Thomas, designed also the preamp and I guess he has taken into consideration the input and output impedances in order to make it work perfectly.  6 db only and independent volume control for each channel... perfect!

I would argue that a stepped volume control would limit the micro volume adjustments needed for a perfect integration of the channels, in such case I would rather used those ugly pots or maybe even the optical volume controls like the Lightspeed.  But the effort is great and in a good direction!

Internal Xovers on the coupling stages of the amplifiers, as Romy has it, works better IMHO, I have tried both and there is a certain insertion loss for a Line level passive xover,  but this also will allow the use of different amplifiers and even an amplifier tasting can be arranged, always a lot of fun!  I know Stepaho owns a lot of good quality amps!

Having played with a lot of amps too I noticed every amp has a different phase output, I have noticed that phase output becomes really important to sound, maybe even more than the amplifier itself, if the phase is off between two amps, the sound is terrible, if you use identical amplifiers, it is easier to multiamp with good results.  Of course, phase problems can be adressed by precise time alignement, but a new change of amplifiers, will need a new careful time alignment, and it can become quite complicated.

Kerry:  Can you put a simple series xover on your system, speaker level based on the original data from Bruce Edgar.  Try it against your wonderful DEQX and see what you like better:  invite some friends over to hear their input, it always helps...

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