...and ATI builds Outlaw's multi-channel amps. If you are interested in ATI, and want to build up an amp over time, adding channel modules as you need it, go with ATI. If you're going to buy all at once, get the Outlaw. Put another way, if you like smaller payments over time, you can go that way with ATI. But if you're going to spend all at once you can save a little money with Outlaw; they just don't sell a partially full chassis.