I am a 49 year old bass player. been playing on & off for 35 years since I was 14. for the last 3 1/2 years I havn't played as, being a respectable neighbour and living in a flat, it would have been too much hassle. ANYHOW my circumstances have now changed and i'm taking up the bass again. now i'll get to the point..today I bought an amp.the amp is used but in MINT condition. problem is, as it's used, theres no operators manual, the amp is a TRACE ELLIOT 715 GP7 150 watt combo, can anyone help ?