Sub Woofer Hum sound

[vadiraj]

Hi All,

Need some help. I have a Martin Logan Dynamo 300 sub woofer. Its connected to a 110V step-down transformer. I am getting a HUM noise when I turn on the SW. Tried multiple options to isolate its power supply, different sources etc..Nothing is helping.

Can someone help please. I am suspecting some capacitors may have gone bad. Is there some one knowledgeable whom I can take this to in Bangalore. I stay in Banashankari III Stage but can take this anywhere in Bangalore.

Appreciate all your help.

Best Regards,
Vadiraj

 

[francis43]

Hi All,

Need some help. I have a Martin Logan Dynamo 300 sub woofer. Its connected to a 110V step-down transformer. I am getting a HUM noise when I turn on the SW. Tried multiple options to isolate its power supply, different sources etc..Nothing is helping.

Can someone help please. I am suspecting some capacitors may have gone bad. Is there some one knowledgeable whom I can take this to in Bangalore. I stay in Banashankari III Stage but can take this anywhere in Bangalore.

Appreciate all your help.

Best Regards,
Vadiraj

Check if earth wire really function in your audio room

 

[vadiraj]

Thanks. Have checked the voltage between Neutral and Ground and its less than 3 volts..

 

[jsmithe]

Hi All,

Need some help. I have a Martin Logan Dynamo 300 sub woofer. Its connected to a 110V step-down transformer. I am getting a HUM noise when I turn on the SW. Tried multiple options to isolate its power supply, different sources etc..Nothing is helping.

Can someone help please. I am suspecting some capacitors may have gone bad. Is there some one knowledgeable whom I can take this to in Bangalore. I stay in Banashankari III Stage but can take this anywhere in Bangalore.

Appreciate all your help.

Best Regards,
Vadiraj

It could be a ground loop(if the hum started recently) or a problem with the stepdown (if the hum always was present). In the past when I used a sub with a stepdown I used to get a hum when using a particular brand of stepdown that went away when I moved to another brand.

 

[vadiraj]

It could be a ground loop(if the hum started recently) or a problem with the stepdown (if the hum always was present). In the past when I used a sub with a stepdown I used to get a hum when using a particular brand of stepdown that went away when I moved to another brand.

Ok..good point. I have another brand step down, will try.
Thanks for sharing..