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SP-250 emits strange buzzing / computer noise from speakers

 
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mightymykle



Joined: 30 Jul 2018
Posts: 2

PostPosted: Mon Jul 30, 2018 12:15 pm    Post subject: SP-250 emits strange buzzing / computer noise from speakers Reply with quote

As title says, my KORG SP-250 makes a consistent buzzing noise (Video below) when turned on. The sound will disappear if I plug in the headphone jack (which mutes the main speakers) so which makes me think its a speaker issue. The piano sound plays perfectly fine (over the buzzing) and in headphones there is no buzz, just clear piano. Curious if anyone has any insight on this, and if its something I could fix easily by opening it up (not extremely handy but can get around).

Video:
Dropbox - Piano Sound.MOV

Thanks!
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mightymykle



Joined: 30 Jul 2018
Posts: 2

PostPosted: Mon Aug 13, 2018 2:15 pm    Post subject: Reply with quote

Just wanted to bump this.

As an update, I've tried using a power conditioner, ferrite clamps, RF filter, 3 to 2 converter, power strip, extension chords, and nothing has worked. It seems to only be when its close to the wall that it makes this noise, which makes me think its some device in the wall that the insides are picking up a sound from. Has anyone else experienced this or has any thoughts on what could fix it?
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voip
Platinum Member


Joined: 27 Nov 2014
Posts: 1667

PostPosted: Mon Aug 13, 2018 2:35 pm    Post subject: Reply with quote

Have you also considered what may be on the other side of the wall, or under or above the affecting area e.g. an air con unit, washing machine, refrigerator, mechanical workshop (with motorised machining equipment), electrical utility company power distribution cables, LED lighting transformer, fluroescent lamp ballast, neon sign/transformer. Any of these can generate quite strong electromagnetic fields that can affect nearby external euipment, such as the SP-250 and other audio gear.

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