Hi all. Sorry for the late reply I've been crazy busy with work. So I finally lugged all the system round to a friends house and bit by bit swapped all the components I was using with his to eliminate what it could be. The speakers work fine which is a relief. (his amp which had an even lower power output played them well) My amp works fine with a line in from his CD. Looks like the problem in the end is the phono input into my Marantz amp. The sound was low and without bass. I then tried to connect my technics to his amp and messed up. Looks like the left channel cable from the technics is a problem. I connected it to his amp and because it was a tight fit dislodged his left phono input, so now I'll also have to fix his phono input asap. Luckily he's a good and understanding friend. My technics when it was connected to his system (and played stereo before the Left input broke) played very low as well. So finally looks like I need sort the cables on my technics and now the phono inputs to both my amp and his which has been dislodged/broken by the cables on the technics. You have all been absolute saviors on this. Thank you so much for the advice!!!!!