McIntosh C2700: different volume for different outputs? (maybe a dumb question!)

To explain:

I want to send music from my preamp to two different rooms at the same time.

Room 1, Output 1 from preamp, is mc275 power amp driving a pair of passive speakers

Room 2, Output 2 from preamp, is a pair of ATC SCM  40A speakers. These are active speakers.

I want to be able to adjust the volume independently for each room.

For instance, maybe room is a large room where I can crank it up a bit, but room 2 is a sitting room that is smaller and the volume needs to be lower.

Can it be done?

Here's a twist: if I can't do that via the preamp, what about using a pair of Sescom inline volume controls (like these)?

seems redundant since the atc actives should have their own volume control and be fed by a line out.

The ATC actives do not have volume control. Their colume is controlled by the pre-amp. Anyone have solutions/ideas? 

Again, the setup is

Main room

C2700-->balanced cable-->ATC SCM 40A

Den

C2700-->MC275-->speaker wire-->Klipsch Fortes

I need to find a way to boost the volume on the Fortes or reduce volume on the ATC SCM 50As

@sweetjonnyp did you ever figure it out?. I have a Mcintosh C2500 with a two zone output configuration as well. Output 1 is a direct connection to my MC452 running a set of passive speakers and Output 2 is supplying a signal to a Sonos connect which is connected to two Hypex Ncore500 Monoblocks which in turn pick up my whole home audio setup. I will be very interested in finding out how the C2500 can achieve individual output volume control as you have mentioned (I realize we have different pre amps but the premise is the same)

Hi, I wound up buying a Behringer Monitor1 passive monitor and volume controller.

See this link.

xlr in from the pre-amp, xlr out to the active speakers

Since it was the active speakers that were louder, i use it to reduce their volume. The passive Klipsch driven by the mc 275s are at 100% of whatever volume i've chosen on the preamp. The atc passive speakers are usually run at 75-80% of full volume