Home |
Search |
Today's Posts |
#1
|
|||
|
|||
Humming noise problem with guitar amp.
Hi,
My local church recently bought a (stereo) keyboard, a volume foot pedal volume (stereo) and a (small) two channel guitar amp. This was so organists would be able to change the volume of the music with the foot pedal. The current set up is to take a signal from the headphone socket on the back of the keyboard, through the pedal where seperate left and right signals feed into each channel of the amp. The outcome of this setup is a very noticeable (earth loop like) hum/buzz. Channel 1 of the amp is a Low-Z input, and channel 2 is a normal high impedance input. When channel 1 is connected by itself there is no buzzing. Channel 2 hums less, when the volume pedal is turned to full on i.e. least resistance to signal. Any suggestions as to how this hum can be removed will be greatly appreciated. Thanks, Jered. |
#2
|
|||
|
|||
Humming noise problem with guitar amp.
|
#4
|
|||
|
|||
Humming noise problem with guitar amp.
In article writes: The current set up is to take a signal from the headphone socket on the back of the keyboard, through the pedal where seperate left and right signals feed into each channel of the amp. I missed the beginning of this thread. If this is a standard guitar amp then it doesnt want to see a signal as hot as a headphone out. It wants to see an instrument level signal or a -10dB line level signal at most. I guess thats the reason for the volume pedal right? The hum may be caused by the huge amount of gain being applied to the (already hot) signal or it could be a ground loop between the keyboard and the amp. Any way you cut it though this is not the way to do this IMO. Square peg, round hole. Why is anyone insisting on playing this keyboard through this amp? Garth~ "I think the fact that music can come up a wire is a miracle." Ed Cherney |
#6
|
|||
|
|||
Humming noise problem with guitar amp.
|
#7
|
|||
|
|||
Humming noise problem with guitar amp.
On 11 Nov 2003 10:01:40 -0800, (Jered
Bolton) wrote: Hi, My local church recently bought a (stereo) keyboard, a volume foot pedal volume (stereo) and a (small) two channel guitar amp. This was so organists would be able to change the volume of the music with the foot pedal. How is the volume pedal powered? I get a hum with my Morley when using wall wart power. I get around it by running it off battery when it matters. -- Willie K. Yee, M.D. http://users.bestweb.net/~wkyee Developer of Problem Knowledge Couplers for Psychiatry http://www.pkc.com Webmaster and Guitarist for the Big Blue Big Band http://www.bigbluebigband.org |
Reply |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
rec.audio.car FAQ (Part 1/5) | Car Audio | |||
Electrical noise problem, hard to pin down | Car Audio | |||
Noise problem please help. | Car Audio | |||
hearing loss info | Car Audio | |||
Noise - alternator, shrieking, etc with Delphi XM satellite system | Car Audio |