New Heathkit AS101 owner - First post.

[voice of the theater]

......I think it will be fun not only playing with the crossover point, but also the slope, volume attenuation for each driver and if I'm not mistaken I can also vary the delay with the DCX2496. That should give me a very high level of control......

Yeah, I'm sure it will be a fun project and I'll still bet that you'll be able to get better results (possibly by a wide margin) in that system with an active crossover/biamp setup. The timing is right IMHO because you've had some time to acclimate to the passive crossover, so now you've got a good frame of reference/benchmark--now you've heard them for a while in their "stock" state and know what you're trying to beat. Since you're fairly new to Altec I thought I'd throw in my two cents. You probably know that's an 811b horn in the AS 101's. Just wanted to make sure you're aware that their rated frequency response goes down to 800 hz so of course no big deal when tinkering to go lower than that but when you are fine tuning and looking for the ultimate crossover point I wouldn't recommend anything below 800 hz. (your current crossover point is 800 hz). As far as the 416 woofers, most Altec users would agree that a crossover point above 1200 hz is undesirable for them--1200 is pushing them to the limit as far as accurate sound reproduction--lower than that is better for the 416's in many systems IMHO. What sounds best to you is all that matters, but if I had to wager a guess, I'd say the ideal crossover point for your AS 101's is much closer to 800 hz than 1200 hz. Of course, that's just a guess and the fun is in the experimentation so YMMV......