So I have a Modulus VJ Active Bass as my primary right now. about 2 weeks ago I was playing and noticed it sounded "flat". Volume was the same but wasnt getting my normal tone. I thought it was the batteries but turns out if I jiggle the instrument cable by my jack it comes back to full force. I switched cables three times and its definately something with the guitar. When I jiggle the cable I get a loud popping noise like its losing connectivity and finding it again. Ideas?