...deal with turn-on-thump everytime I fire up the rig?

I've reassembled my system even though it has numerous faults that tend to drive me crazy. But my main concern (today ;)) is the fact my woofs jump an inch out whenever I turn on my Adcom 555 II.

I know this topic has been beat to death; but which is the lesser of the two evils?

On or Thump?


Thanks for your continual patience with my dumbass.


Matt

Electricity rates have sky rocketed here in this area, so I turn off all electrical utensils when not in use.

Off, I say! :thmbsp:

Rome

Thump's not hurting anything as far as I can tell. I used a 555 Mk II with Infinity RS-IIIb's (4x10" woofer) for 15 years and have had no issues whatsoever. Just make sure all upstream components you plan to use are powered up and stable and the volume control is turned all the way down before powering up the amp.

And I do not leave my gear powered up all the time. Too much chance any time of the year here in Florida for lightening strikes to risk leaving precious audio gear plugged into the wall.

I leave digital gear on all the time, and sometimes leave my entire rig on 24/7...But

All electronics have a MTBF (mean time before failure) which gets eaten up unnecessarily by doing this; and things like electrolytic capacitors, tubes and lightbulbs see a drastic shortening of their lives, although this is open for debate.

Turn-on/off thumps are not so big an issue unless they are very loud.

Leave all mine OFF until use. electricity is not cheap and all components ahve a time limit before needing a re-cap.

In the past I always left it all on. Nowdays it stays off. I think it gives the components more lifespan, and saves $$$, too.

I leave most of my gear on except my Unison amp which I leave on for the weekends only. Takes a full day for that amp to really sing and at least 3 hrs to warm up enough to really enjoy it's attributes. The same with my Creek amp which I listen to in my home office every morning before work and every evening after work...were I to turn it off I would rarely hear it reach it's potential...no I'll leave it on and pay the price.

What you can do is install a DPDT delay relay on the speaker outputs of your amp. The normally closed contacts goes to a couple 8 ohm resistors and the normally open contacts goes to your speakers. I've used one on a solid state amp that could drive a 4 ohm load directly, but used an output transformer for driving different impedances. When I removed the transformer I got a pop in the speaker when turning the amp on. Using a delay relay set for a 5 second turn on delay fixed the problem. Would be best to integrate it inside your amp somehow so it goes on and off with your amp's power switch unless you turn everything on and off with a power strip.

Up to you.Your paying the power bills.I would shut mine down thump or no thump.

Would not turning the speakers off before powering up the amp stop the thump?

Would not turning the speakers off before powering up the amp stop the thump?

Probably, if your amp has speaker switching.

Most of mine do not.

i have always thought the hardest thing on electrical equipment in general is turning them on and off. better to stay warm then for them to go from cold to warm and warm to cold etc. maybe someone who knows something (not me that's for sure) can touch on this.

Probably, if your amp has speaker switching.

Most of mine do not.

Quite right, Sir. Unlike you most of my amps had a selector for the speakers, so I was thinking one dimensional.

...deal with turn-on-thump everytime I fire up the rig?

I've reassembled my system even though it has numerous faults that tend to drive me crazy. But my main concern (today ;)) is the fact my woofs jump an inch out whenever I turn on my Adcom 555 II.

I know this topic has been beat to death; but which is the lesser of the two evils?

On or Thump?


Thanks for your continual patience with my dumbass.


Matt





Dumb question, but are you turning your power amp on last and off first during shutdown?

RC

My repair dude lectured me on this subject when I passed on having my B&Ks power switch repaired, professing that heat build up inevitably leads to early component failure.

I wouldn't worry about the woofers, they're just responding to the input signal. You could turn your volume down during power up, or am I missing something in the power-up process?

i have always thought the hardest thing on electrical equipment in general is turning them on and off. better to stay warm then for them to go from cold to warm and warm to cold etc. maybe someone who knows something (not me that's for sure) can touch on this.

Your quite correct that the hardest thing on electrical equipment is the huge swings in temp. but there is a balance that has to be considered .... All components have a life span and running them all the time might save you some cold solder joints but the lifespan of the components are reduced. I don't turn off my computer anytime but I'm not expecting it to last 25 years and in my experience the only negative aspects of doing so are the lifespan of fans and the extra cost of electricity .... I have had more problem with computers that I have turned off when not in use but still use the standby feature to save hard disks ...... It is my thought that smd components are more likely to fail from heating cooling cycles than discreet components. I still always turn off any audio gear that isn't being used not only for energy savings but for the longevity of said gear.

Whew 14-hour-days SUCK!!!!!!!!!!!!

thanks for all the replies guys. I guess the consensus is to turn my shit off. I just was under the impression the thump deal is bad. Doucanoe; I follow that procedure when I turn on/off. There is no speaker switch on my amp. The turn on thump isn't even that loud; but if I have the grilles off the speakers the movement bothers me somehow. But if it's not hurting anyone; I can live with that.

Thanks for all your advice peoples.


Matt