Altec 3-way active

[GM]

The sagging upper end, don't know why that is so bad, or should I be looking at reducing the mid part ?

To accurately reproduce a square wave, which is required to accurately reproduce music, etc., it must be in time, phase and have a flat frequency/impedance response. Pretty tough to do over a wide BW.

Normally, we want at least an octave of flat BW on either side of a 2nd order XO point, so that's your first 'hurdle' to XO nirvana, ergo the simple answer is yes..............

GM




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The question is, will it help if we separate the XO point, to bring that bump down ?

Yes, though understand that this introduces [excessive] delay with increasing 'gap'.

That said, it can be used to align a compression horn to a point source [cone/dome driver] since it takes the former an extra 90 deg [1st order] delay to 'gather up its skirts' to move relative to the horn and why a 3/2 XO is often used as well as 'steer' the HF:

Linkwitz-Riley Crossovers: A Primer

A Bessel Filter Crossover, and Its Relation to Others

Does the DSP have adjustable phase to blend them together?

GM

[jocelys1]

Thanks again Greg. While I digest the Bessel implementation, I'm going to try the 30904 attenuation circuit by Altec. I've experimented with it earlier and had good results.

The MiniDSP has adjustable phase, so, yes, I could play with that too.

[jocelys1]

This is what I've ended up with going active. Equalization on the LF and reversed polarity on the MF . Xovers are 2nd order LR at 200 & 1600.