I keep my subs on auto-on as well. I can hear the subs power down after roughly 30 minutes of no incoming signal. You can hear a very quiet "thump" as it powers off the amplifier.

Makes sense; seems there is no need to worry, despite years of use. Thanks! :thumbsup:

Update:

My JL Audio Fathom f113 subwoofer is still rocking the living room system. It has been 10 months since replacing the capacitor in the auto-on circuit board and the subwoofer continues to work perfectly. I still find myself glancing at the subwoofer's grill each morning when I energize the system to make sure I see the green lights come on, always happy to see them glowing through the grill cloth.

Color me a happy listener. . :roots:

What? A tool I don’t have... now I do! ;)

Has it really been that long? Seems like a few months ago

Thanks to jdandy for his informative post. I recently picked up a used F110 sub with an early 2012 build date, and decided to take a peak at the capacitors on the amp board.

My unit uses Capxon capacitors, but there appears to be several different series identified by color. About half of the caps with blue labels had high ESR. The 33uf / 400v cap was was in very bad condition. All of the black, orange, and green labeled caps measured fine.

I changed all the blue labeled caps for new 105 degree Nichicons which were listed as well suited for switching power supplies (which is basically what these amps are).

Here's a photo in case it proves useful for anyone with an F110 who wants to do this themselves:

https://i.imgur.com/4XZmlgBl.jpg

electrafixion.......Great job. You should get many more years of great service from the f110. Thanks for the photo and the outline on the suspicious caps.

Dan... I bought 6 of each Cap you mentioned earlier in this thread from Mouser, just to keep on hand. Dirt cheap, and super fast shipping.

Thanks! :ok:

Ivan.......That's the way to do it. Spare parts are always good to have on hand. Hopefully they will not be needed for a long time, but you never know.