Thread: Sub on auto on??

Originally Posted by Zookster

I learned the hard way and use Auto On on my JBL sub.

When I first got it, I had it plugged into a switched outlet on the back of my AVR so power was cut to it when I turned off the AVR. Well, after 10 months of this, the Auto On function went haywire (I'm assuming that was the cause) and would constantly click on and off whenever it wasn't receiving a strong/steady bass signal. I got a warranty service for it, but after 3 agonizing months, the service center still couldn't figure out the problem nor reproduce it themselves, so I finally just took it back, contacted JBL directly, told them of my woes, and they thankfully agreed to replace it.

Power on sequencing is a tough engineering problem, and one that is often ignored by designers. I never recommend using switched outlets for anything more complex than a lightbulb.

Mine has been in the auto-on mode since day 1. Seems to come on almost instantly as soon as some bass content is detected, and goes off about 10 mins after I switch the receiver off. Seemless operation at any volume level. I'm assuming the standby mode draws very minimal current. But in about a year I will have incentive to challenge everything that doesn't have a hard off mode when our electric rates increase by (expected) ~50%...! I might have to start using the power switch on the suppressor strip a bit more. If so, I'll power up 5 mins. before I intend to start watching to let the 622 spool-up etc., then turn on the receiver and other components. The sub shouldn't behave any differently. (Not sure how the DPP44 will respond being powered-down. That piece might have to be isolated to an always-on branch.)

If you have the 622 powered down then it won't be on to record anything for you. Means your DVR is nothing more than a trick mode machine...