Preamp with two volume controls?

I'm confused or you're confused. 2 preamps give you 2 x 2 channels. A preamp with 2 volume controls gives you 1 x 2 channels but with separate left and right control. 

JL Audio CR1 crossover has a sub/satellite balance control.

btw, The lamm L1 has three volume controls!  

You're really using two McIntosh C50 preamps in a stereo setup?  Your description and reasoning makes no sense.

Thank you for all the help and I am looking into all the suggestions with some success. My description may make no sense, but my reasoning is solid for what I want out of my system. My room is very large and I have built a left and right speaker array using Klipsch Heritage speakers. A set of Khorns, LaScalas, and Heresy lll speakers. I have modified the big boys to have the same speakers and crossovers and left the Heresy speakers stock. Hence the 2 Mac 252 amps and the Anther STR for the Heresys. First C50 gets a balanced output from my Marantz SACD11S the second C50 gets the rca output. The subs are sprinkled throughout the room and yes, they do have volume control through their  app, but that is not as helpful as you would think with 3 subs. The gain on the subs are adjusted to integrate with the heresy speakers which are powered by the Anthem. C50 number 2 runs the subs and small speakers. This gives me full control over how much bottom end I am hearing in my room. Once all the phase issues were worked out this experiment really worked out. The preamp I am looking for would have different volume controls not for different channels but for different outputs. Preferably a control for sub output. Once again thanks for everybody's input.