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05/01/25 at 08:18:53

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Hum from the ZROCK, what to do? (Read 7753 times)

Stefan Seasoned Member Posts: 120	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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Rivieraranch Seasoned Member Posts: 2132	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 Seasoned Member Posts: 120	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
Back to top	- Stefan --------------------- Rega rp6, Lounge Audio phono pre-amp, Lonely Raven PC, T+A DAC 8 DSD, ZBIT, ZROCK2+25th, SE84UFO25, Torii IV, Denon AVC-1SE, Infinity IRS Beta, Tannoy Cheviot, ERRx, Tiny Radials, Woo WA-3, Sennheiser HD800S IP Logged

Rivieraranch Seasoned Member Posts: 2132	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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Stefan Seasoned Member Posts: 120	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.
Back to top	- Stefan --------------------- Rega rp6, Lounge Audio phono pre-amp, Lonely Raven PC, T+A DAC 8 DSD, ZBIT, ZROCK2+25th, SE84UFO25, Torii IV, Denon AVC-1SE, Infinity IRS Beta, Tannoy Cheviot, ERRx, Tiny Radials, Woo WA-3, Sennheiser HD800S IP Logged

ScottNC

Seasoned Member

Posts: 360

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

TORII MKIV-25th,ZBIT,ZROCK2-25th,ZTPRE-25th,ZLC,DNA2's,REL Sub,Technics SL1300G,Nagaoka MP-500,Ortofon Concorde,Teac PE505
MyTek Brooklyn DAC+,Sonore ultraRendu LinearPS,sonicTransport APi7 4TB Woo WA6, Sennheiser HD660s RoomTreatments DHC1

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TK78 Verified Member Posts: 11	Re: Hum from the ZROCK, what to do? Reply #6 - 09/09/19 at 15:18:45 I just sent my unit back because of a hum coming from the speakers. It was a pretty loud hum. Got considerably worse after a few days. It was a new unit.
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Lon Seasoned Member "Love without guts is worthless!" Philip K. Dick Posts: 25750	Re: Hum from the ZROCK, what to do? Reply #7 - 09/09/19 at 15:57:50 That's.a shame. Every time I've had a hum from a Decware unit it's turned out to be a hum from elsewhere, though very difficult at times to locate. More often than not it's the location of the unit in regards to power cables, even though I use shielded cabling. Hope it's a fast turnaround with a cure.
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TK78 Verified Member Posts: 11	Re: Hum from the ZROCK, what to do? Reply #8 - 09/09/19 at 16:16:51 Yeah, I agree. I tried it on a buddies system and got same results.
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Lon Seasoned Member "Love without guts is worthless!" Philip K. Dick Posts: 25750	Re: Hum from the ZROCK, what to do? Reply #9 - 09/09/19 at 17:43:53 Well, you should get a quick turnaround. Hoping for a quick return.
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cave Verified Member Posts: 16	Re: Hum from the ZROCK, what to do? Reply #10 - 09/10/19 at 05:50:45 One thing I will say about the ZROCK2, at least in my system, it is quiet as a mouse and adds 0 noise. Inside there is considerable grounding, and it's pretty solid ground connections IMO.
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