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Severe Hum Common (Read 1971 times)
RoanWrangler
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Posts: 6
Severe Hum Common
03/07/22 at 01:53:20
 
Are all ZP3 delivered with hum and does everyone just accept it?  Reviews for the item are cultish, but all seem to mention problems or acceptance of hum.

Short wait now for a Torii Jr.  and starting to look at the next upgrade (DAC and/or phono preamp).

Will additional peripherals like a ZMC, ZSTAGE, etc increase the likelihood of unresolvable humming?  
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Pro-ject - RPM 3 Carbon
Sumiko - Blue Note 2
Schiit - Mani
Marantz - ND8006
Border Patrol - DAC SE-i
G.A.S. - Thalia
G.A.S. - Son of Ampzilla
Carver - C-2
Carver - M 1.5t
Decware - TORII JRv2 (any month now)
Decware - ZP3 (2025)
Decware - MRC1 (2025)
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JBzen
Seasoned Member
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Posts: 1344
Re: Severe Hum Common
Reply #1 - 03/07/22 at 02:07:45
 
Hi RoanWrangler, welcome!

I have a ZP3 and it is absolutely quiet. Did you connect the phono ground to the ZP3?

John
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AMC CD8b>XO3>Cambridge CXN2>ZDAC>ZBOX>braided silver/occ> Zrock2>CSP2+>SE84 milflex copper 25th>9AWG silver/copper braid>lii Crystal 10 in Huijgen cabinets. Ortofon 2M Black>JVC QL-F4/Otari MX5050B2>ZP3. Isolation. AC filtering. Room treatment.
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Archie
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Posts: 2731
Re: Severe Hum Common
Reply #2 - 03/07/22 at 02:08:33
 
My ZP3/ZMC doesn't hum.  And I am not in a cult.   Grin
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ZLC
Technics 1200G TT w/ Ortofon Jubilee MC cart
ZMC1
ZP3 (25th A Mods)
ZR2 (25th A Mods)
CSP3 (25th A mods)
ZMA (25th A mods)
Homemade Big Betsy Speakers (F15s)
Silver Cabling
DIY Isolation platforms under amps & TT.
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chapsjon
Seasoned Member
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Posts: 184
Re: Severe Hum Common
Reply #3 - 03/07/22 at 02:22:44
 
Can't speak for ZP3, but my ZP1 is absolutely quiet. No hum at all. I can't believe Steve would upgrade to the next model, ZP3, and somehow introduce hum that hadn't been there in first model. If you read the white papers on ZP1 and ZP3, he makes it clear he threw out lots of designs precisely because of hum. Clearly, he was careful to design a phono stage that does not introduce hum.

Even the best phono pre will amplify hum it is fed, however. Could it be that you're using a cartridge prone to hum (like Grado) and that the ZP3 has more gain than your previous phono stage, so now you're noticing it? Or that your ZP3 is plugged into power strip/ ground loop is occurring?
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LR:Mini Torii+Wright WPP100 phono, CSP2+SE84UFO, Pioneer Exclusive M4, Accuphase E-303,Graham Slee Jazz Club, Technics SL-1200MK3D Grace F-8 & Nagaoka MP-110, Yamaha NS-1000M, KEF Reference 101, Sony SS-5050
BR: SE84C+, ZP1 phono, Decware 945
JVC QL-7 Shure V15
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RoanWrangler
Verified Member
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Posts: 6
Re: Severe Hum Common
Reply #4 - 03/07/22 at 12:05:41
 
Thank you for the quick responses.   Sorry if I mislead folks.  I am waiting for my first Decware piece, a Torii Jr., and don't yet have a ZP3.  

No intent to insult anyone with the "cultish" descriptor.  Maybe I should have used some form of enthusiasm.  BTW I have joined a few cults in my life, Schiit, Tekton, Decware (soon), Harley Davidson:)

Internet forums/blogs are my only reference and almost every entry (even here) mentions hum issues.  It is good to hear that hum is not always introduced to a system with the ZP3.

Almost pushed over the ledge to order a ZP3 for 2024/2025 delivery.  
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Pro-ject - RPM 3 Carbon
Sumiko - Blue Note 2
Schiit - Mani
Marantz - ND8006
Border Patrol - DAC SE-i
G.A.S. - Thalia
G.A.S. - Son of Ampzilla
Carver - C-2
Carver - M 1.5t
Decware - TORII JRv2 (any month now)
Decware - ZP3 (2025)
Decware - MRC1 (2025)
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Archie
Seasoned Member
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Posts: 2731
Re: Severe Hum Common
Reply #5 - 03/07/22 at 16:40:47
 
I agree that the ZP3 is "associated" with hum but it rarely seems to be the actual problem.  It may cause hum sensitivity in other ways though.  In my case I thought I had ZP3 hum but it eventually was cured by rerouting interconnects.
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ZLC
Technics 1200G TT w/ Ortofon Jubilee MC cart
ZMC1
ZP3 (25th A Mods)
ZR2 (25th A Mods)
CSP3 (25th A mods)
ZMA (25th A mods)
Homemade Big Betsy Speakers (F15s)
Silver Cabling
DIY Isolation platforms under amps & TT.
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RoanWrangler
Verified Member
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Posts: 6
Re: Severe Hum Common
Reply #6 - 03/16/22 at 16:56:25
 
Thanks guys.  Ordered my retirement presents this morning.  ZP3 and MRC1 on the way.  Plenty of time to address other upgrades while waiting.

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Pro-ject - RPM 3 Carbon
Sumiko - Blue Note 2
Schiit - Mani
Marantz - ND8006
Border Patrol - DAC SE-i
G.A.S. - Thalia
G.A.S. - Son of Ampzilla
Carver - C-2
Carver - M 1.5t
Decware - TORII JRv2 (any month now)
Decware - ZP3 (2025)
Decware - MRC1 (2025)
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Showme
Seasoned Member
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Posts: 302
Re: Severe Hum Common
Reply #7 - 03/25/22 at 23:04:26
 
No worries with the ZP3. Mine is fully tricked out and couldn’t be better.  Ziggy even made a case for it in Paduak to match the rest of the 25th Anniv equipment. You’ll love it.
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