The fantastic folks at Audio by Van Alstine sent me detailed instructions for their suggested crossover modification and it's been three years since completion.
With high grade parts, a soldering gun and a spool of Cardas silver solder, the whole project cost $70.00 or so. It took me about 3 hours. Now I would be able to do it in less than an hour. Easy peasy even for a first timer.
(Series II with Series III tweeters, I am original owner).
The APOC is bypassed, the bass is better integrated than with the alignment filter (discarded) , and just as low (not measured, just my opinion)
The speakers completely disappear. Silky smooth with tons of inner detail.
AND no need to bi wire. The combination of this change along with the addition of a Synergistic Research Powercell LE V2 has added so much refinement, accurate and rock solid 3D imaging that blows your walls out, you will not believe your ears that it is the same speaker. And keep them 6 to 8" off the floor.
This speaker bought on the used market with these modifications is so stupidly cheap in comparison to what is offered for ten to twenty grand. Makes me wonder if a whole industry would halve evolved around the reselling of these vintage gems with these modest modifications for a boutique price, if they were not so plentiful.
I'm using a 2010 ASR Emitter II Battery integrated and Tara Labs Omega Onyx and Zero gold with an upgraded BOW ZZ8.
After this mod, I forgot all about a new speaker upgrade.
