Hi everyone, I've just bought my first bass (from ebay) after playing 6-strings and producing for many years. It's a Samick, and think It's a Fairlane although it doesn't say anywhere on the instrument. Problem is it makes a terrible hissing sound half the time with the occassional crackle, particularly if the nob closest to the bridge or the jack are bumped/touched. About a quarter of the time it's fine. I've tried it with with lots of leads and systems but it's definitely the instrument. Is this easy to fix or have I been ripped off? This is my first problem with Ebay after buying tons of gear off there. Cheers.