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Peavey Tour TNT 115 !POPS! switching off!?

kbodonne

kbodonne

Aug 31, 2012
44
4
Austin, TX
www.bearote.com
#1
I recently purchased the Peavey Tour TNT 115, I like the amp alot it sounds great, I've had it on a few medium-small club gigs and it's worked out really well, BUT when I turn it off I get this electric sounding POP in the speaker. It's annoyed me to the point that now before I turn off the amp I turn the gain, volume, and EQ sliders all the way down, and the tweeter off. It helps, but the pop's still there.

Does anyone have this problem or know what's going on/ how I can fix it?
thanks,
B
 
#2
If this is an older peavey, that problem used to be a result of the amp being very hot inside. The spring in the switch would 'relax' and cause the contacts to slam together. So, rather than swiiitch Off, it would snap Off. Common for those lil 3/4" rocker switches back then.

If it's happening when it's not really warm, well....
 
#3
the Arsonaut said:
If this is an older peavey, that problem used to be a result of the amp being very hot inside. The spring in the switch would 'relax' and cause the contacts to slam together. So, rather than swiiitch Off, it would snap Off. Common for those lil 3/4" rocker switches back then.

If it's happening when it's not really warm, well....
Click to expand...

It's definitely doing a "snap Off" like you said, but this amp is relatively new, I think they were released in the past 3-4 years... Not 100% . If I switch it on/off real quick, like when I plug in just to make sure I have power I won't get the Pop, but any time at all when it's had a second to warm up I get it... I'd really like to know if I've got a defective model or if it's normal for these amps. Can this be fixed/ sent to manufacturer.
I really like the amp, the growl I can get with the Bright and Crunch effects on with the tweeter is really sweet and the tweeter sounds amazing, real crisp. I just hate this pop :hmm:
Here's the amp: Invalid Link Removed
 
#4
It is quite normal for a SS amp to "pop" when you switch it on or off. Most amps today have a a delay before the speakers are connected to allow for the amps electronics to stabilize. The power switch has nothing to do with it. It will do the same if you just pull the plug out of the wall.
 
#5
It's normal. The power up is delayed to avoid a turn on pop, but power down is unpredictable, so there's sometimes a pop. Some amps use a relay to disconnect the speaker quickly when powering down, but even then there's no guarantee that will stop it every time, and the relay is a common failure point. Sorry for the inconvenience.
 
#6
I can't confirm whether it's the old peavey style switch or not from where I'm sitting, either.

If you got this from a store, check out another model on the floor...power it up, and walk away for a few minutes...give it a good run with a bass, and try the switch...that may allay your fears that you've got a defective amp.

Switches on consumer grade equipment (or anything that doesn't require a license to throw) are supposed to have two sets of contacts, at least one set will act as a spring of sorts, internally. What you are experiencing is what happens when they both coming snapping together.
On high voltage equipment, sparks would be flying...

I will tell you that, I had a TNT and a TKO for practicing, over the years. Despite that same 'pop', they are both still working.
 
#8
Hi.

So I take it that You haven't heard a vintage SWR rig power up or down?

Or SS Marshall's?

Now there's a POP.

If it would harm anything, every pre-Fender and most of the Fender SWR's would've died a long time ago. As would have every SS Marshall.

So it's annoying, but quite normal.

BTW, do signal the FOH (and foldback) guy to mute the channel before powering up/down if You're miked, the pop through PA still won't damage the equipment, but a few undies may require cleaning.

Regards
Sam
 
#9
I pre-ordered this amp back bearly three years ago and was the first one to receive mine due to some pressuring on Customer Service who then put me in contact with the President of Product Development (I believe his name was Fred Poole). The day I bought it I turned it on in store, played it, turned it off and it popped. That is just the way the TOUR TNT 115 works. It is a beautiful.piece of machinery and that is one of the most endearing traits the amp possesses. POP!
 
#10
Turn off pops can be expected from most solid state amps. Most turn off pops are caused by an imbalance in the way the positive and negative power supply voltages collapse when current ceases to flow from the power transformer when the power switch is turned off. One supply will collapse before the other and allow some active component to put out a little DC spike. The severity of the pop can also depend on where the AC line voltage is in it's cycle when the power switch contacts are opened. Null, peak or somewhere in between with turn off at a peak giving the loudest pop. It's very difficult, and usually expensive, to design an amplifier that will always turn off gracefully under any condition and with any given set of parts that are within tolerance but do vary in value. The parts not only include the parts in the power supply but also any parts in the amp that are active and use power. Older amps may develop a pop due to value changes in parts over time. With a new amp, one unit may not pop and another may pop due to the variation in parts value that add up the wrong way.

mech

Hey, Bobby. Hope the gig went well last night.
 
#11
Hey, Bobby. Hope the gig went well last night.
Click to expand...

It wasn't bad for the Echo. I was sitting down right in front of the PA speaker at the end of the night when Freddie powered down the system. It popped real good, which scared the crap out of me and made me remember this thread! Come sit in tonight. I'll buy you a drink.
 

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