I've been building live sound systems for nearly 20 years (8/4/2 ohm systems), and only in the last month have learned about 70 volt systems, due to the fact that I have a client who wants build an outdoor system for them.
They are, obviously, very different. But I think I understand 70 volt systems now, and they're actually pretty simple -- assuming my research was done correctly. But I wanted to confirm with the experts I'm sure are browsing this board.
The speakers for my system will be JBL Control 29AV. I want to use Crown Amps
These 70 volt JBLs have Transformer taps @ 110W, 55W, 28W & 14W
For my question, I've assumed that I'll use them at the 110w settings
Config. #1: So, if I buy the CTs 600 amplifiers, and use them in 70v dual/two-channel mode, I can get 2 speakers per channel and be 80 watts under the power rating. Is this correct?
Config. #2: Or, conversely, if my final design needs more speakers, I can buy the CTs 1200, and put 4 speakers on each channel?
In the long run, this outdoor system will have between three and five geographical zones. Since I'll control audio through a Matrix audio switcher, I'm thinking that I'll need something like 16 speakers, and up to 4 amps.
Have I gotten the calculations right, or horribly wrong?
Thanks in advance!