This is getting interesting.
I want to think the sugestions already made.
lsiberian in fact I have readed those informations about bi-amping. But sometimes I miss some points.
I'm just going to discuss the disavantages.
1- If I go the bi-amp way, I would save money from one amplifier (aprox. 200 €). Great. But, I will need to spend on the passive crossovers. Maybe 80 € for both. That saves me 120 €. Also I will be loosing 2 outputs on the DCX, right?
I agree that 120€ is a considerable amount of money, with that I can almost build the rear speakers for a 5.1 system. But also look at this, I'm young, and certanly I will want to do more teaking and some upgrades in the future, going tri-amp (or 3 way fully active) I'm not going to loose the money spent on the passive crossovers. But I'm still considering any reasonable option.
That is actually something I hadn't really thought about, but adds to my pro active approach. And depending on the parts you get, and how complicated the crossover scheme is, 80€ for the crossover parts may be on the low side.
2 - I completly agree that "one amplifier with twice the power versus two amps of half the power biamped is less likely to clip"
I posed this question to someone I know that has the technical backround to address this point -- his contention is that a 200 watt with a full range signal is more likely to clip than two 100 watt amps with an active crossover between them. There is a thread someplace on the web that this arguement has been addressed -- if I can find it, I'll post a link. I think lsiberian addresses the issues in most real world examples by actively crossing the <250hz signals, but I really don't think this is going to be an issue if you've got ~50 watts for the tweet and ~80 watts for the mid. , the tweet probably can't even handle a sustained 50watts.. but I digress.
JCD by your comments I assume that you encourage the 3 way full acive, right?
Absolutely. There are dozens more advantages to active systems that we haven't fully discussed, such as the ability to perfectly time align the drivers using a well designed crossover, the ability to accomplish perfect phase and impulse response without much effort and without the terrible side effects of passive components attempting to pull it off, improved power response, elimination of microphonics, the ability to create the absolute most ideal filter with virtually no tolerance, the elimation of shift in tolerance related to input voltages. the elimination of back-current artifacts in the crossover, increase in realized damping factor, and many more. (note, this paragraph is shamelessly copied from another thread on another forum)
This doesn't even take into account the ability to subsequently tweak the system using different types of crossovers (e.g., Bessel or LR or Butterworth) or different orders (6dB, 12dB, 18dB, 24dB, etc).
I don't want to completely oversell an active system -- it will still take time, skill, testing, etc to create a good system, but I do think it's simpler to do and offers a lot of tangible benefits over a passive system. And I will put my money where my mouth is -- when I finally build my "all out system", I'm going fully active in a 3 way system and I'm going to use that same crossover you've picked.