I'm posting this in case some of you are interested. The company I work for is in the process of a biggish Control4 install--half retrofit, half new construction. The home is about 7 years old, and has a finished first & second story. The basement was left unfinished until now. The home already had speakers in nearly every room. However, half the house was controlled by a Russound multi-zone audio system, while the other half consisted of a 70 volt commercial sound system with traditional volume controls.
We started by removing the transformers from all speakers tied to the old 70v system. We were able to retrofit at least a 16/2 to a speaker in each room, allowing us to properly "zone out" the old series wiring, although some zones will have to be mixed mono as opposed to stereo. The original audio headend was on the second floor in a built-in rack. We will be adding much more equipment in the basement, but rack space there will be limited, so we opted to reuse the second floor rack as the house audio headend. Fortunately for us, the house has an elevator & we were able to retrofit wiring between floors using the elevator shaft.
Most of the A/V sources will be in the basement racks, so we ran RG-59 x 16 for L/R audio from 8 sources to the second floor headend. There will be 9 audio zones in the basement, so we ran the nine 16/4's from the second floor headend to their respective zones downstairs. With 19 existing audio zones, there will be a total of 28 independent audio zones.
Audio switching is performed using two 16-channel Control4 matrices. Each audio source input is split to be sent to both matrices. The matrices then feed four 12-channel digital amps from SnapAV (plus a feed to the theater's AVR in the basement).
All the old volume controls and Russound keypads were removed & speaker wires spliced where needed. Control will be from on screen displays/handheld remotes, a total of 5 in-wall touchscreens, & various iDevices.
Sources available to the audio distribution system will be: 5-disc CD changer, Blu-ray player, 3 Time Warner cable boxes, TiVo DVR, Control4 media player, iTunes library on external hard drive (via Control4 controller), C4 iPod dock on main floor, C4 iPod dock in basement, the clients' existing HD Radio tuner, and multiple streams of digital audio (Rhapsody, etc.) via C4 controllers.
We are also implementing a couple of neat extras: the homeowners are purchasing a player piano for the basement. We are making it a source available to the distributed audio system. There is an existing NuTone intercom system in place. The main unit has a built-in CD player. Although we don't expect it to get much use, we are tying it into the system as well. Finally, we are integrating the doorbell--when pressed, it will prompt the Westminster chime to play in all 28 zones.
I'll try to post some pictures of the completed audio headend tomorrow. If it looks like anybody cares, I'll continue with the video, theater, and other facets of the automation system within this project.