D600

[pisabell]

i have a 400 ,Could i use a 220 as the master driving high and mids. And 400 bass?

Yes you can, provided ou have a way to bypass the pssive crossover on your speakers. With some speakers (like those of Naim audio for example) this is very easy: the passive crossover is externally mounted on back of the cabinet and feeds each driver through a separate connection (e.g. separate wires + banana plugs). 

I was able to drive the 2-way Naim SBL in purely active mode. Their passive crossover was removed altogether.  One D200 was used to drive the high-mid driver and the other D200 to feed the bass driver. I used the high/low-pass settings in the "speakers" section of the on-line Devialet configurator to tailor the speaker output of each D200. For details, search for my thread entitled "Going active with a two-way speaker" on this forum. I found this setup to be extremely successful: the SBL's sounded much better that when used with their passive crossover fed by a dual-mono D400.

I did another experiment with the much larger 3-way Naim DBL's. In that case, I kept the passive crossover to feed both the midrange and the tweeters, using one D200 in high-pass mode, while the bass drivers were fed directly by the other D200. I found this configuration slightly better than using the passive crossover for all drivers, but the difference was much less pronounced than with the 2-way SBL, no doubt because the passive crossover remained in the way.

  Pierre