hi. i have a ibanez sr500 and its a great bass. However the neck pick up works 100% but when i turn the eq to both or just bridge pick up the sound of the bass is horrible. when ever i play a note it plays normally but with fuzzy/buzzing noise on top. its unplayable. when i mess around with treble and mid settings it changes the lvl of the fuzzy noise. Any idea on what is wrong please ??