Hi guys


just brought a secondhand subwoofer the velodyne cht -10 and it works fine. but i noticed it makes a low humming sound when switch on and on standby. should it do that i no the guy i brought it off didnt give me the proper power cord so i dont no if it could be that .or it could be a fault inside the amp or even the phono leads i just need to no as its doing my head in thank you