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rob2 · July 4th, 2009, 07:44 AM

Got a call from a cousin of mine re his Crafter electro-acoustic.When plugged in but not being played there is a "knocking" coming from the guitar,quite clear.He contacted Crafter who sent out a new preamp/control module but the problem wasn't solved-good customer service though.I've not come across this before but we both reckon it must lie in the undersaddle element?
Anyone have any suggestions or experienced this problem?Thanks!

Wally · July 7th, 2009, 06:55 PM

Are you saying that without any provocation, there is a 'thump' coming from the pickup?
IF so, is it rhythmmic? Random?
I am going to suspect something other than the pickup and preamp. Is there a drunk little leprechaun sneaking behind him and thumping on the guitar? LOL

Jakedog · July 7th, 2009, 07:28 PM

By saying this is happening "when not being played", do you mean while it's sitting on a stand with no one touching it? Or do you mean when he stops playing, but is still holding the guitar?

Some of the piezo elements out there are extremely sensitive, and will thump, bump, knock, etc. with even very subtle handling noise. The slightest movement or touch to the guitar's body can make quite a racket.

rob2 · July 8th, 2009, 01:15 PM

Quote:

Originally Posted by Wally

Is there a drunk little leprechaun sneaking behind him and thumping on the guitar? LOL

That hasn't been ruled out yet!...but hes a sensible kid

so I'm hoping not!
I wonder though is it any form of electro-magnetic interference,he has a lot of gear in his den....

Jake the strange thing is it is rhythmic,its not noticable when playing and its when its plugged into an amp whether held,left lying etc- could it be related to the house mains electricity?
I'll give him a call soon and see how he's doing,he was planning to take it to tech soon...

Wally · July 8th, 2009, 02:26 PM

Take the guitar to another location, plug it into an amp. IF the thump is not there, the guitar is not the problem. Take his amp with him. Plug the guitar in to his amp. IF the thump is not there, the problem is no with the guitar or the amp.....it is in the environment in which the thump is evident.

July 4th, 2009, 07:44 AM	#1 (permalink)
rob2 TDPRI Member Join Date: Apr 2009 Location: Cork,Ireland Age: 45 Posts: 63	"Thumping"sound from piezo? Got a call from a cousin of mine re his Crafter electro-acoustic.When plugged in but not being played there is a "knocking" coming from the guitar,quite clear.He contacted Crafter who sent out a new preamp/control module but the problem wasn't solved-good customer service though.I've not come across this before but we both reckon it must lie in the undersaddle element? Anyone have any suggestions or experienced this problem?Thanks!

July 7th, 2009, 07:28 PM	#3 (permalink)
Jakedog Friend of Leo's Join Date: Mar 2003 Location: Cleveland,OH But my heart's still in TX Posts: 4,571	By saying this is happening "when not being played", do you mean while it's sitting on a stand with no one touching it? Or do you mean when he stops playing, but is still holding the guitar? Some of the piezo elements out there are extremely sensitive, and will thump, bump, knock, etc. with even very subtle handling noise. The slightest movement or touch to the guitar's body can make quite a racket. __________________ It's not that I lack focus, it's just that I'm musically schizophrenic...

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July 7th, 2009, 06:55 PM	#2 (permalink)
Wally Poster Extraordinaire Join Date: Mar 2003 Location: Lubbock, TX Posts: 6,007	Are you saying that without any provocation, there is a 'thump' coming from the pickup? IF so, is it rhythmmic? Random? I am going to suspect something other than the pickup and preamp. Is there a drunk little leprechaun sneaking behind him and thumping on the guitar? LOL

July 8th, 2009, 02:26 PM	#5 (permalink)
Wally Poster Extraordinaire Join Date: Mar 2003 Location: Lubbock, TX Posts: 6,007	Take the guitar to another location, plug it into an amp. IF the thump is not there, the guitar is not the problem. Take his amp with him. Plug the guitar in to his amp. IF the thump is not there, the problem is no with the guitar or the amp.....it is in the environment in which the thump is evident.

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