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I have Nakamich 2nd order crossover with discrete parts so it can be tweaked

Separate PSU which can also be tweaked.

Add PLLs and it can be used for 3rd order, perhaps even kneed slopes for the bass to mid (450 Hz or lower) and as you suggested, 1st order (PLLs) for the 6kHz Hp and LP.

I might try to avoid using the 2nd order HP path by allowing the sealed mid encl. to do that slope, getting 3rd with a PLL. Prima face this might sound more transparent but I'm aware that I would be putting the WR driver into power limiting. I'll have to listen to and measure both. I'd prefer to cross at or above the smaller sphere's BDS -3db point (~ 400 hz?) and thus avoid having to Eq for it, which makes the cascaded filter up around 400Hz more likely.

I don't suppose the small sphere's current sealed 150Hz 2nd-order high-pass roll-out will create in-phase-matching issues around the 400 point, will it? measure and listen?

WR drivers used as mids can certainly have their advantages, in a 3-way.

I'll be using two of the larger 8inch driver Rb spheres below, one facing down slot-loaded, and one above in a cut-down basketball hoop, on a height adjustable column. This array should fill-in the floor-bounce dip and extend the bass of the floor loaded port, a bit.

The smaller sphere with the 5" WR driver will also be held in place by another cut-down hoop and on the same column.

Thanks Chris.


Tim Bailey

Skeptical Measurer & Audio Scrounger

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  • I have Nakamich 2nd order crossover with discrete parts so it can be tweaked - Timbo in Oz 16:56:06 06/12/12 (0)


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