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Hum from the ZROCK, what to do? (Read 896 times)
Stefan
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Hum from the ZROCK, what to do?
12/31/18 at 22:08:21
 
Hi,
my ZROCK2 25th has a slight hum coming from the device itself. When I press a little on the top of the device it goes back to a very minimal level.
Anyone else experienced that?
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- Stefan
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Rega rp6, Lounge Audio phono pre-amp, T+A DAC 8 DSD, SE84UFO25, Tannoy Cheviot, Woo WA-3, Senheiser HD800S
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Rivieraranch
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Re: Hum from the ZROCK, what to do?
Reply #1 - 01/01/19 at 18:10:57
 
Something is probably shook loose in there.
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Stefan
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Posts: 61
Re: Hum from the ZROCK, what to do?
Reply #2 - 01/12/19 at 17:17:00
 
In case you guys experience the same, here my fix: everything was nice and tight in there, but the transformer seemed to have touched the bottom plate and caused the hum, so I put a bit of heat resistent rubber between the transformer and the bottom plate, now it is whisper quite Smiley
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- Stefan
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Rega rp6, Lounge Audio phono pre-amp, T+A DAC 8 DSD, SE84UFO25, Tannoy Cheviot, Woo WA-3, Senheiser HD800S
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Rivieraranch
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Re: Hum from the ZROCK, what to do?
Reply #3 - 01/13/19 at 13:52:56
 
Saved yourself from having to ship it back to the factory.
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MINI TORII ANNIVERSARY MODIFIED; SE84UFO; ZSTAGE; MONOLITH SPEAKERS; TECHNICS SL1200MK2 KAB MODDED TT; ONKYO 6 DISC CD; MARANTZ 2226B; SCHIIT MULTIBIT DAC; SENNHEISER HD-580 headphones
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Stefan
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Posts: 61
Re: Hum from the ZROCK, what to do?
Reply #4 - 01/13/19 at 17:38:37
 
Indeed!

Steve, if you are reading this thread, maybe something to consider doing as a default in new builds.
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- Stefan
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Rega rp6, Lounge Audio phono pre-amp, T+A DAC 8 DSD, SE84UFO25, Tannoy Cheviot, Woo WA-3, Senheiser HD800S
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ScottNC
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Posts: 257
Re: Hum from the ZROCK, what to do?
Reply #5 - 02/02/19 at 18:12:48
 
Steven,
I have to modify my original post below, my hum was coming through my speakers, not from the unit itself, although with some pressure on the top it mostly went away, I pulled the bottom and put in 1 thin layer of foam (old Craftsman tool chest liner) and it now has significantly reduced the hum, I'm writing the small remaining noise to the Sony until further notice.  :)

Just got my ZROCK2 25th back and have the same hum, I figured it was because of my running it into my SonyHAP1s while my MKIV is being modded. I'm going to try your fix as we speak. Exactly the same thing, when I press on the top it goes away! Glad you got it sorted, I hate shipping stuff out unless absolutely necessary. I'l follow up.

Best,
Scott
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