Gearslutz.com - View Single Post - Dynaudio BM15A hum - active monitor hum due to cheap TC Elec amplifier inside?

tcause · 27th October 2007

Sounds like you got yourself some ground loop...

Now I think that the design on active monitors should take care of this... (subs are usually the most susceptible... I have one sub out of 4 in our lounge/demo room that is susceptible)... but given that it don't you can do all the reading about curing ground loops and why they occur etc and good luck with that... they are mongrel things to track down and fix.

The other approach is to remove the gound pin from your IEC cables... this will probably cure it... it is technically not too good an idea and I hope that you only do this if you know your power is up to scratch and you have a tested earth leakage detector etc...

I don't know how you've gone about connecting power in your studio but if your monitor controller/desk and monitors are connected to a single outlet via a power board or conditioner this can also help...

27th October 2007	#4
tcause Gear maniac Joined: Sep 2006 Location: Melbourne, Australia Posts: 228	Sounds like you got yourself some ground loop... Now I think that the design on active monitors should take care of this... (subs are usually the most susceptible... I have one sub out of 4 in our lounge/demo room that is susceptible)... but given that it don't you can do all the reading about curing ground loops and why they occur etc and good luck with that... they are mongrel things to track down and fix. The other approach is to remove the gound pin from your IEC cables... this will probably cure it... it is technically not too good an idea and I hope that you only do this if you know your power is up to scratch and you have a tested earth leakage detector etc... I don't know how you've gone about connecting power in your studio but if your monitor controller/desk and monitors are connected to a single outlet via a power board or conditioner this can also help...