Please see the following excellent reference:
http://www.jensen-transformers.com/an/an004.pdf
As you'll see, interconnect cables are usually key factors in how hum/buzz is introduced into a system. They should be kept as short as possible, and should be chosen to provide low shield resistance (although unfortunately that is often not specified, and trial and error among different cables may be the only way to tell).
Regards,
-- Al
http://www.jensen-transformers.com/an/an004.pdf
As you'll see, interconnect cables are usually key factors in how hum/buzz is introduced into a system. They should be kept as short as possible, and should be chosen to provide low shield resistance (although unfortunately that is often not specified, and trial and error among different cables may be the only way to tell).
Regards,
-- Al