click here for the crossover picture, 43K JPG.

The DCR of inductors in the commercial ProAc 2.5 is unknown, but the lowest possible DCR is recommended around 0.2-0.4 ohm for all inductors." 

The original 1996 Stereophile magazine review and technical assessment indicates the tweeter and woofer are out of phase with each other and your final tweeter crossover should reflect this. This is shown differently in the original Chinese magazine crossover, however it is now unanimously accepted and proven by both listening tests and measurements that reversing the polarity of the tweeter on the Hong Kong crossover circuit is correct (see final crossover at bottom of this page).

The internal cable is Bandridge Superflex OFC LC 7403. http://www.bandridge.nl/index2.htm

Thanks to Jacq from Madisound discussion board, measurements have been done using the standard non-customised drivers 18W/8535-00 and shielded 18W/S8535-00, which have slightly different physical parameters to commercial ProAcs but do not affect the sound (See FAQs).  Using the Chinese magazine crossover with standard drivers produces a slight to moderately audible 2khz peak, which can be reduced by changing the woofer crossover inductor from 1.5mH to 1.8mH and capacitor from 8.5uf to 7uf as recommended by Jacq and preferred by many. Most of the early successful reviews are based on the original Chinese magazine crossover with tweeter polarity inverted. The differences in sound between the crossovers are moderate but significant. So the Jacq modified crossover is still largely preferred by many who know the original sound of the ProAc 2.5 even to that of other modifications suggested by Troels G. and others who have done much valued further work on producing a more neutral sounding 2.5 clone version, which is a very different sounding speaker (see his site in the linklist). If you seek a more neutral sound or application of the Scan Speak 9500 tweeter his recommendations are highly recommended by many.

The final recommended crossover schematic, which includes all the modifications is depicted in the following link, click here. Thanks to Treols G. for the schematic.