Thanks for the reply. I do not have a problem with the AUTO on. It gets an audio signal, no problem. I have the subs turned OFF when I do not listen to my AV receiver. When I turn the AV receiver on, thats when I turn the subs on. The issue is the sub POWER on. I do not want to keep getting up to turn ON the sub from its ON OFF power switch. I also do not wish to leave the subs on all the time.
Just checking, so no offense if you fully get this, but you understand that most subwoofers have a true automatic power on/off feature integrated into them? That is, when there is no audio signal (voltage), then subwoofer, after 10 or so minutes, will completely shut down. You don't need to manually go over and turn it on/off when you use the system. Just leave them in 'AUTO' mode for power, and they will power up when you turn on your AV receiver and a few minutes after you power off your AV receiver, the subwoofer will power down. Just the same as if you were using a 12v trigger.
Maybe you already understand how that works with subwoofers, but it kind of sounds like you may not. Typically the 12v trigger from a receiver is used to trigger amplifiers which are in the equipment rack, not subwoofers in the room. But, it would help to know what the make/model is of your subwoofers to ensure they have proper automatic on/off control from the LFE input.