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Thread: Passive preamp buzzing?

  1. #1
    Join Date: Nov 2015

    Location: Wolverhampton

    Posts: 5,425
    I'm Oliver.

    Default Passive preamp buzzing?

    Hi all,

    A Goldpoint passive pre, once the Pre owned and sold by Marco, has made it to my abode for a bit of a sample.

    I have plugged it in as I do my own Passive and it's buzzing like a hive. My cables are fine, the cable dressing makes no difference and "nothing I do don't seem to work" as the mighty jagger once said.

    Any ideas?

    Sent from my EVA-L09 using Tapatalk
    Analogue: Technics SP10 MK2 > Phonomac AT-1010 tonearm > Ortofon Kontrapunkt b > Wizard Jfet MC Valve Phonostage (Telefunken Valves)
    Digital: Firebottle modded Xiang Sheng DAC (Telefunken Valve)
    Amplification: Slagle AVC Passive Preamp & Firebottle Monoblocks (Telefunken Valves)
    Cables: Fisual S-Flex Speaker Cable & SPOTFIRE IC Cables Throughout
    Speakers: Pioneer CS-77A

  2. #2
    Join Date: Jan 2008

    Location: Forest of Dean, Glos

    Posts: 9,964
    I'm Jerry.

    Default

    It's probably a grounding issue with the cabling.
    Swap 'em out one by one.
    Jerry

    Qobuz Hifi / Spotify Premium streaming, SMSL M8 DAC + L-PSU, Herron VTSP-2 valve preamp, Trigon TRE 50 monoblocks, MBL 116F.

    Cables: Wireworld Starlight USB, Ixos Ixotica i/c, W&M speaker cables, Belden 19364 mains cables

  3. #3
    Join Date: Apr 2012

    Location: Southall, West London

    Posts: 35,336
    I'm Geoff.

    Default

    Or the turntable chassis needs earthing?

  4. #4
    Join Date: Nov 2015

    Location: Wolverhampton

    Posts: 5,425
    I'm Oliver.

    Default

    Had no issue previous until I plugged this Goldpoint in. I'll have a look. Cheers guys.

    Sent from my EVA-L09 using Tapatalk
    Analogue: Technics SP10 MK2 > Phonomac AT-1010 tonearm > Ortofon Kontrapunkt b > Wizard Jfet MC Valve Phonostage (Telefunken Valves)
    Digital: Firebottle modded Xiang Sheng DAC (Telefunken Valve)
    Amplification: Slagle AVC Passive Preamp & Firebottle Monoblocks (Telefunken Valves)
    Cables: Fisual S-Flex Speaker Cable & SPOTFIRE IC Cables Throughout
    Speakers: Pioneer CS-77A

  5. #5
    Join Date: Jan 2008

    Location: Forest of Dean, Glos

    Posts: 9,964
    I'm Jerry.

    Default

    If any of the cabling is unscreened that may be an issue.
    Jerry

    Qobuz Hifi / Spotify Premium streaming, SMSL M8 DAC + L-PSU, Herron VTSP-2 valve preamp, Trigon TRE 50 monoblocks, MBL 116F.

    Cables: Wireworld Starlight USB, Ixos Ixotica i/c, W&M speaker cables, Belden 19364 mains cables

  6. #6
    Join Date: Nov 2015

    Location: Wolverhampton

    Posts: 5,425
    I'm Oliver.

    Default

    Oh, ok. That could be a thing.

    Sent from my EVA-L09 using Tapatalk
    Analogue: Technics SP10 MK2 > Phonomac AT-1010 tonearm > Ortofon Kontrapunkt b > Wizard Jfet MC Valve Phonostage (Telefunken Valves)
    Digital: Firebottle modded Xiang Sheng DAC (Telefunken Valve)
    Amplification: Slagle AVC Passive Preamp & Firebottle Monoblocks (Telefunken Valves)
    Cables: Fisual S-Flex Speaker Cable & SPOTFIRE IC Cables Throughout
    Speakers: Pioneer CS-77A

  7. #7
    Join Date: Jan 2008

    Location: Wrexham, North Wales, UK

    Posts: 78,158
    I'm AudioAl'sArbiterForPISHANTO.

    Default

    Hi Oliver,

    Interesting... Who sold it to you?

    It certainly didn't buzz when I had it. It was as silent as a graveyard. As others have said, I suspect it must be an earthing issue. Try wiggling or twisting the plugs on the contacts (with everything powered up) and see if you can stop the buzzing.

    One thing you have to be careful of with the WBT sockets I fitted (as they have minimal metal on the contacts, which is how they're designed), is that the plugs on the interconnects you're using fit snugly and are making a proper connection. If not, you may cure the problem by simply changing cables for ones with plugs that 'mate' better with the WBTs.

    Be interesting to find out what you think of it once you've had a proper listen

    Marco.
    http://www.thestainedglasscompany.com

    "A man is a success if he gets up in the morning and gets to bed at night, and in between he does what he wants to do" -- Milan Kundera.

    BE HAPPY EVERYDAY!

  8. #8
    Join Date: Nov 2015

    Location: Wolverhampton

    Posts: 5,425
    I'm Oliver.

    Default

    Quote Originally Posted by Marco View Post
    Hi Oliver,

    Interesting... Who sold it to you?

    It certainly didn't buzz when I had it. It was as silent as a graveyard. As others have said, I suspect it must be an earthing issue. Try wiggling or twisting the plugs on the contacts (with everything powered up) and see if you can stop the buzzing.

    One thing you have to be careful of with the WBT sockets I fitted (as they have minimal metal on the contacts, which is how they're designed), is that the plugs on the interconnects you're using fit snugly and are making a proper connection. If not, you may cure the problem by simply changing cables for ones with plugs that 'mate' better with the WBTs.

    Be interesting to find out what you think of it once you've had a proper listen

    Marco.
    Hi Marco,

    I didn't buy it �� it's on loan from Shaman. He's a top banana. Initial impressions are good although it's quite "coarse" sounding compared to my bog standard unit. This is probably due to the level of transparency. Vocals and top end are outrageously good. It was like I'd put a different cartridge on the TT. I suspect it's more a case of letting all the gear warm up and getting used to it a bit. Channels separation is phenomenal and the soundstage is obviously wider and deeper. Vocals a touch more forward I think my preamp is a touch more fluid but silver v copper ime can show that to be the case. All in all. It's surprising how much difference it makes.

    O

    Sent from my EVA-L09 using Tapatalk
    Analogue: Technics SP10 MK2 > Phonomac AT-1010 tonearm > Ortofon Kontrapunkt b > Wizard Jfet MC Valve Phonostage (Telefunken Valves)
    Digital: Firebottle modded Xiang Sheng DAC (Telefunken Valve)
    Amplification: Slagle AVC Passive Preamp & Firebottle Monoblocks (Telefunken Valves)
    Cables: Fisual S-Flex Speaker Cable & SPOTFIRE IC Cables Throughout
    Speakers: Pioneer CS-77A

  9. #9
    Join Date: Mar 2011

    Location: Preston

    Posts: 196
    I'm Paul.

    Default

    With passives its almost always earthing. Defo check you're getting good connections with your cables. Also, if it's been moved around a lot and/or plugged/unplugged, might be worth checking inside that nothing has come loose. If you have a multi meter, check all the grounds are connected and that none of the signal lines are earthed (unless the volume is on zero)
    SBT/Chromecast/TEAC T1 into TEAC D-T1 DAC or olde-worlde Rega Planar 2 controlled by Rotel RC850 into HH S500D or DACT Passive Pre into Mullard 5-20 monos. Then into Tannoy Cheviots and a Wharfdale sub. All connected by colourful cables.

  10. #10
    Join Date: Oct 2016

    Location: Bolton, England

    Posts: 1,192
    I'm Andrew.

    Default

    If you turn the volume down to zero and the buzzing is still there it must be due to a fault in a cable or in the Goldpoint. At zero volume the output should be shorted to ground and therefore silent. If not, a definite fault.

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