All that and I was curious about the C2000 mods needed for use with the 1590.
Sure wish i knew, but i dont have enough xover understanding. Based solely on my personal use of Pioneer SF series, pro setups with actives, and the ADS c-2000 i figure the mod MAY be based on resistor changes.
Looking at specsxover specs for the 3 models the c2000 was built for:
L1230 550, 4000hz
L1530 450, 4000hz
L2030 450, 4000hz
Positions A B and C on the c2000.
Curious, that xover of the 1230 and 1530 are the same, yet there are separate settings on the c2000.
The 1590, with xover of 350,5000 ...Not sure what resistance would be altered, but judging from some of the adjustable Bryston actives i see, resistance is at least part of the factors. However, the c2000 does something with bass control as well, all of it is 12db. As ALL of these ADS mentioned do NOT use an active for the mid/tweeter section, its interesting what purpose the c2000 serves here.
What Does work, are pro audio amps with built in xover for the woofers, and direct input to the mid/tweet section. However, there is something the c2000 does that this setup does not (besides bass expansion)
It does however work well, and provides me with my favorite aspects of biamp systems.
1. i can use tubes on the upper end.
2. i have direct volume control over the woofers, without effecting the rest of the system.