2. amps-preamps
  3. 148520-18760

Permanent 50hz

I have 50hz noise from the speakers.
its not the hiss from the tweeter. It’s from the mid. (Rrrrrrr)
the noise is exists even when only the power is connected to the speaker with no source and preamp.
the problem could be from the electricity in my home or it’s the amp

musicland1
erik_squires
16,152 posts
 
Is your speaker powered? If so it's probably a bad power supply in it.
gdnrbob
4,449 posts
 
You could also try a Hum Buster to see if it is you home wiring.
B
armstrod
613 posts
 
Given your 50hz comment I'm assuming you're outside the US. If the equivalent of 3-prong adapters exists for your local plug configuration, get one and see if the noise goes away. If it does, you have a grounding problem, which you'll have to work on component by component. If the noise stays, it's more likely your amp or an upstream component creating the noise.
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