[musicville]

my mate has had his kef sub for 2 and a half years as part of the 1001.1 package and had no problems with it. however he has just changed his amp from a old yamaha amp to a new sony 800 amp and has noticed that it has started to 'hum' at a low frequency when playing dvds music and blurays. could it be the amp ? cable ? or is the sub nakkered ? any help would be great, thanks in advance

regards Musicville

[majorwedgy]

Could be a grounding issue, however since it is KEF I would direct you to the VERY long discussion on the PSW2000 sub which is similar to the one you have which may provide you with some answers