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#2012982 - 01/11/13 05:40 PM Headphone's Hum/Static
Norrec Offline
Full Member

Registered: 12/16/10
Posts: 28
Well, I suspect there will be no easy answer, but doesn't hurt to ask.

I recently purchased some Sennheiser HD-598 headphones for my Roland RP-301 DP. The first thing I noticed when I plugged them in and turned the power on was a hum(or static, or white noise) even at 0 volume. This sound didn't change even at max volume, but did seem to lessen a bit when I plugged in a second pair of headphones(there are two ports on the RP301).

I tried moving the wires around but no effect. I brought in my beefy surge protector which(according to the box) cleans the power, but that did nothing. Following the manuals advice I moved the piano to a different spot, but no effect. I tried a different outlet(still in the same room) and no effect there either.

I assume this is being caused by the enviroment? Outside my window 1 story down are 2 AC units(sit on the ground, big fans on the top) and there are 2 more to the left for the next units over. Checking my wireless it looks like every unit in this complex has it's own wireless router, plus I have one myself. are all these devices causing this? If so is there a (reasonably) priced solution or do I just need to get used to it?

Now that I think about it, down the road a little ways is a giant antenna. Not one of those ones that planes could collide with, but very noticible. I bet that isn't doing anything good.

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#2013227 - 01/12/13 05:44 AM Re: Headphone's Hum/Static [Re: Norrec]
peterws Offline
3000 Post Club Member

Registered: 07/21/12
Posts: 3461
Loc: Northern England.
Why not either buy or borrow a cheap pair o` headphones? Cost about £5 from Argos or Amazon. . . .then you`ll know if it`s outside interference or not. How about your neighbours? Are they troubled too?
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#2013268 - 01/12/13 07:59 AM Re: Headphone's Hum/Static [Re: Norrec]
Norrec Offline
Full Member

Registered: 12/16/10
Posts: 28
I've already tested with my old Asus headphones and they have the same problem. I had always assumed it was the fact that they were 7+ years old and not high-end even back in their day.

I played on my piano most of last night and the buzz didn't bother me as much as when I'd first plugged them in. I was just hoping I could buy a little noise-remover to plug in or something and it'd clear the problem up. Or even if this seemed like a fault of the RP301 itself then I'd know I need to get complaining to Roland(I still have a warenty).

Right now if I keep both my headphones plugged in at the same time the noise is less. I guess it splits the buzz between them? This seems to be a ok temporary solution.


Edited by Norrec (01/12/13 08:51 AM)

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#2013372 - 01/12/13 11:12 AM Re: Headphone's Hum/Static [Re: Norrec]
bennevis Online   content
4000 Post Club Member

Registered: 10/14/10
Posts: 4859
I get the same constant hum from my V-Piano when using my Klipsch Image earphones, but not when using my AKG K271 Mk II (which my dealer threw in free with my V-Piano) or Grado SR 325is headphones. I just assumed that it's some interference problem, but it's only audible because the surroundings (i.e. in my apartment) are very quiet.

I don't know whether I'd get the same hum from other Rolands or other brands using my Klipsch, because the showrooms are never quiet enough to be able to hear it anyway.

Maybe try borrowing a different pair of good headphones (even a different brand) and see if you still get the hum.

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#2013404 - 01/12/13 12:12 PM Re: Headphone's Hum/Static [Re: Norrec]
Dave Horne Offline
5000 Post Club Member

Registered: 07/07/04
Posts: 5276
Loc: Vught, The Netherlands
Right now if I keep both my headphones plugged in at the same time the noise is less. I guess it splits the buzz between them? This seems to be a ok temporary solution.

I would think since the headphone amp is driving two sets of headphones, that extra noise is less but then so is the input level driving both headphones ...? Headphones are typically passive, right? Unless your headphones use batteries or an external power source they are passive.
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