Hi there, i got a 5150 half stack amp and the evh wah pedal, my problem is when i engage the pedal comes a terrible hum, i already change the cables, 9v battery and the ac adapter and the big noise continues, how could it be? Thank you
Music - Dunlop - EVH Wah Wah Pedal Wah
Answers & Comments
WHY are you using a battery AND a 9 Volt adapter? This is an either/or thing. Chances are you have a defective ground someplace. Use just the battery and try it... If the hum is gone, the adapter is NOT compatible with the pedal. A lot of hum problems occur because the guitar is near a source of magnetic fields, such as an amp. An embarassing thing is for a musician to reverse the in and out connections to the pedal... it will have the symptoms you have mentioned.
The pedal and the pedal board should not pick up hum. The pickups in the guitar are very sensitive however. Make sure you plug the adapters into the SAME receptacle as the amps. Using different receptacles within a building for different parts of your system often results in noise and hum. The quality of cables make a difference. Sometimes people use speaker cables by mistake and while they will pas the signal, they are NOT shielded. Some real nice looking cables from Radio Shack are not very well shielded I have found. The pedals often have gain so ANY hum will be amplified when you enable the pedal. Also try changing the position of the pedal if you have more than one. This pedal should be almost before the signal goes to the amp, not right at the guitar if you have more than one pedal.