I used to have a Motorola console that used a similar arrangement. The tweeters and mid-ranges were separated to left and right, and the big-a** woofer was the center channel. I wouldn't have called it a subwoofer, but it did fill the room with a pleasant sound. I don't expect wide separation in a console, but this one had more than enough. The side speakers also had immovable louvers to disperse the higher frequencies. If your console is set up this way, try it and see if you like it. If it works, enjoy it for now and decide later if you want to have it restored or at least some preventative maintenance done. The big things to look for are excessive 60 cycle hum and weird smells. If you can see the tubes, look for extremely red or blue glows from the output tubes and rectifier, this signifies a possible capacitor short or leak.
