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Thread: Goldpoint SA4M-47 passive 'preamp' winging its way to Marco Towers...

  1. #41
    Join Date: Feb 2013

    Location: Switerland

    Posts: 1,184
    I'm rupert.

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    you mean his wife could have seen it ?

  2. #42
    Join Date: Feb 2013

    Location: Switerland

    Posts: 1,184
    I'm rupert.

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    Quote Originally Posted by walpurgis View Post
    Just having a bit of fun swapping avatars about!

    Who knows? I might keep a naughty one.
    avatar7147_163.gif

    Thats got to be the "Boss Mode" avatar

  3. #43
    Join Date: Apr 2012

    Location: N E Kent

    Posts: 51,620
    I'm Geoff.

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    Probably be this one soon.
    It is impossible for anything digital to sound analogue, because it isn't analogue!

  4. #44
    Join Date: Jan 2008

    Location: Wrexham, North Wales, UK

    Posts: 110,531
    I'm AudioAl'sArbiterForPISHANTO.

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    Lol - you've gone boring again!

    Anyway, as the Goldpoint is starting to settle in now, and I'm loving how it's sounding, I've decided to carry out one of their approved mods, detailed in this section of their website, under the title of: "It does not get loud enough soon enough" (scroll down past the other section outlining the opposite effect, and go down to the bottom):

    http://www.goldpt.com/mods.html

    It involves simply fixing a resistor of the same value as the stepped attenuators (50K), at the point shown in the diagram. I'm doing this because, although the sound is excellent, nothing much happens, volume-wise, up until around 9 o'clock on the dials, which kind of defeats the purpose of having the available steps beforehand.

    Therefore, as it says on the website, I want to "reduce the number of silent, unusable knob positions", in my case, before the 9 o' clock position, and bring it more in line with how the DACT stepped attenuator on the Croft operates in that respect.

    So I'm popping along to Dunc's (Tubehunter) later to get that done. I'll report later on what effect it has, as others contemplating purchasing a Goldpoint may encounter a similar issue, unless their source components have exceptionally high gain.

    Marco.
    Main System

    Turntable: Heavily-modified Technics SL-1210MK5G [Mike New bearing/ETP platter/Paul Hynes SR7 PSU & regulator mods]. Funk Firm APM Achromat with Nagaoka GL-601 Crystal Record Weight. Isonoe feet & boots. Ortofon RS-212D tonearm with Denon DL-103GL, in a Denon PCL-300 headshell, fitted with Funk Firm Houdini and Kondo SL-115 pure-silver cartridge leads.

    Paul Hynes MC head amp/SR5 PSU. Also modded Lentek head amp and Denon AU-310 SUT.

    Other Cartridges: Nippon Columbia (NOS 1987) Denon DL-103. USA-made Shure SC35C with NOS stylus. Goldring G820 with NOS stylus. Shure M55E with NOS stylus.

    CD Player: Audiocom-modified Sony X-777ES/DAS-R1 DAC.

    Tape Deck: Tandberg TCD 310, fully restored and recalibrated as new by RDE, plus upgraded with heads from the TCD-420a. Also with matching TM4 Norway microphones.

    Preamps: Heavily-modified Croft Charisma-X. Power Amps: Tube Distinctions Copper Amp, fitted with Tungsol KT-150s. Quad 306.

    Cables & Sundries: Mark Grant HDX1 interconnects and digital coaxial cable, plus Mark Grant 6mm UP-LCOFC Van Damme speaker cable. MCRU 'Ultimate' mains leads. Lehmann clone headphone amp with vintage Koss PRO-4AAA headphones.

    Tube Distinctions digital noise filter. VPI HW16.5 record cleaning machine.

    Speakers: Tannoy 15MGs in Lockwood cabinets with modified crossovers. 1967 Celestion Ditton 15.

  5. #45
    Join Date: Aug 2009

    Location: Staffordshire, England

    Posts: 43,357
    I'm Martin.

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    I don't understand why you would want to do this. You are adding an extra and unnecessary resistor into the signal path. So what if you will never use the first few steps on the dial?
    Current Lash Up:

    TEAC VRDS 701T > Sony TAE1000ESD > Krell KSA50S > Troels Gravesen Faital 3WC-15.

  6. #46
    Join Date: Jan 2008

    Location: Wrexham, North Wales, UK

    Posts: 110,531
    I'm AudioAl'sArbiterForPISHANTO.

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    It's just a little annoying that the initial few knob positions don't really do much. Also, that's not meant to happen, and is likely because my older Sony DAC has a lower output voltage than modern DACs/CDPs do, which the Goldpoint has probably been designed to be used with.

    That is why they mention the mod, in order to offer some flexibility. It's only one resistor, and if it's of good quality (which it will be), I can't see there being an issue. However, I will of course be comparing the 'before and after' effect, so if there is any audible degradation in sound quality, after fitting the resistor, then it'll be removed and I'll leave things as they were.

    No harm in trying it, though!

    Marco.
    Main System

    Turntable: Heavily-modified Technics SL-1210MK5G [Mike New bearing/ETP platter/Paul Hynes SR7 PSU & regulator mods]. Funk Firm APM Achromat with Nagaoka GL-601 Crystal Record Weight. Isonoe feet & boots. Ortofon RS-212D tonearm with Denon DL-103GL, in a Denon PCL-300 headshell, fitted with Funk Firm Houdini and Kondo SL-115 pure-silver cartridge leads.

    Paul Hynes MC head amp/SR5 PSU. Also modded Lentek head amp and Denon AU-310 SUT.

    Other Cartridges: Nippon Columbia (NOS 1987) Denon DL-103. USA-made Shure SC35C with NOS stylus. Goldring G820 with NOS stylus. Shure M55E with NOS stylus.

    CD Player: Audiocom-modified Sony X-777ES/DAS-R1 DAC.

    Tape Deck: Tandberg TCD 310, fully restored and recalibrated as new by RDE, plus upgraded with heads from the TCD-420a. Also with matching TM4 Norway microphones.

    Preamps: Heavily-modified Croft Charisma-X. Power Amps: Tube Distinctions Copper Amp, fitted with Tungsol KT-150s. Quad 306.

    Cables & Sundries: Mark Grant HDX1 interconnects and digital coaxial cable, plus Mark Grant 6mm UP-LCOFC Van Damme speaker cable. MCRU 'Ultimate' mains leads. Lehmann clone headphone amp with vintage Koss PRO-4AAA headphones.

    Tube Distinctions digital noise filter. VPI HW16.5 record cleaning machine.

    Speakers: Tannoy 15MGs in Lockwood cabinets with modified crossovers. 1967 Celestion Ditton 15.

  7. #47
    Join Date: Nov 2013

    Location: Scotland

    Posts: 186
    I'm Michael.

    Default

    Quote Originally Posted by Marco View Post
    Lol - you've gone boring again!

    Anyway, as the Goldpoint is starting to settle in now, and I'm loving how it's sounding, I've decided to carry out one of their approved mods, detailed in this section of their website, under the title of: "It does not get loud enough soon enough" (scroll down past the other section outlining the opposite effect, and go down to the bottom):

    http://www.goldpt.com/mods.html

    It involves simply fixing a resistor of the same value as the stepped attenuators (50K), at the point shown in the diagram. I'm doing this because, although the sound is excellent, nothing much happens, volume-wise, up until around 9 o'clock on the dials, which kind of defeats the purpose of having the available steps beforehand.

    Therefore, as it says on the website, I want to "reduce the number of silent, unusable knob positions", in my case, before the 9 o' clock position, and bring it more in line with how the DACT stepped attenuator on the Croft operates in that respect.

    So I'm popping along to Dunc's (Tubehunter) later to get that done. I'll report later on what effect it has, as others contemplating purchasing a Goldpoint may encounter a similar issue, unless their source components have exceptionally high gain.

    Marco.
    My Goldpoint is the same but by the 12 o'clock position produces a healthy volume in my room. As I leave the volume control where it finishes at the end of listening it's not a problem for me.

  8. #48
    Join Date: Jan 2008

    Location: Wrexham, North Wales, UK

    Posts: 110,531
    I'm AudioAl'sArbiterForPISHANTO.

    Default

    Hi Michael,

    Yup, no worries. I didn't go for the added resistor mod in the end, but something else that is *much* better and that has not only cured the issue I had [with low volume output in the early control positions of the stepped attenuators] but improved the sound no end at the same time, by leaving only ONE resistor in the signal path (instead of 47), but still giving me the adjustment of 47 steps!

    It now sounds INCREDIBLE...

    Can't discuss it here, but if anyone wants to know the details of the mod, pop me a PM

    Marco.
    Main System

    Turntable: Heavily-modified Technics SL-1210MK5G [Mike New bearing/ETP platter/Paul Hynes SR7 PSU & regulator mods]. Funk Firm APM Achromat with Nagaoka GL-601 Crystal Record Weight. Isonoe feet & boots. Ortofon RS-212D tonearm with Denon DL-103GL, in a Denon PCL-300 headshell, fitted with Funk Firm Houdini and Kondo SL-115 pure-silver cartridge leads.

    Paul Hynes MC head amp/SR5 PSU. Also modded Lentek head amp and Denon AU-310 SUT.

    Other Cartridges: Nippon Columbia (NOS 1987) Denon DL-103. USA-made Shure SC35C with NOS stylus. Goldring G820 with NOS stylus. Shure M55E with NOS stylus.

    CD Player: Audiocom-modified Sony X-777ES/DAS-R1 DAC.

    Tape Deck: Tandberg TCD 310, fully restored and recalibrated as new by RDE, plus upgraded with heads from the TCD-420a. Also with matching TM4 Norway microphones.

    Preamps: Heavily-modified Croft Charisma-X. Power Amps: Tube Distinctions Copper Amp, fitted with Tungsol KT-150s. Quad 306.

    Cables & Sundries: Mark Grant HDX1 interconnects and digital coaxial cable, plus Mark Grant 6mm UP-LCOFC Van Damme speaker cable. MCRU 'Ultimate' mains leads. Lehmann clone headphone amp with vintage Koss PRO-4AAA headphones.

    Tube Distinctions digital noise filter. VPI HW16.5 record cleaning machine.

    Speakers: Tannoy 15MGs in Lockwood cabinets with modified crossovers. 1967 Celestion Ditton 15.

  9. #49
    Join Date: Feb 2013

    Location: W Lothian

    Posts: 98,920
    I'm Grant.

    Default

    Quote Originally Posted by Marco View Post
    Hi Michael,

    Yup, no worries. I didn't go for the added resistor mod in the end, but something else that is *much* better and that has not only cured the issue I had [with low volume output in the early control positions of the stepped attenuators] but improved the sound no end at the same time, by leaving only ONE resistor in the signal path (instead of 47), but still giving me the adjustment of 47 steps!

    It now sounds INCREDIBLE...

    Can't discuss it here, but if anyone wants to know the details of the mod, pop me a PM

    Marco.
    so its not heading to charity towers then
    Regards,
    Grant .... ؠ ......Don't be such a big girl's blouse

    I've said it before and I'll say it again: democracy simply-doesn't-work
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    Oh my god! There's nothing wrong with the bidet is there?

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    ***SMILE, BE HAPPY***

  10. #50
    Join Date: Jan 2008

    Location: Wrexham, North Wales, UK

    Posts: 110,531
    I'm AudioAl'sArbiterForPISHANTO.

    Default

    Lol - no chance, with the way its sounding now!

    Might have a Croft preamp up for grabs, though...

    Marco.
    Main System

    Turntable: Heavily-modified Technics SL-1210MK5G [Mike New bearing/ETP platter/Paul Hynes SR7 PSU & regulator mods]. Funk Firm APM Achromat with Nagaoka GL-601 Crystal Record Weight. Isonoe feet & boots. Ortofon RS-212D tonearm with Denon DL-103GL, in a Denon PCL-300 headshell, fitted with Funk Firm Houdini and Kondo SL-115 pure-silver cartridge leads.

    Paul Hynes MC head amp/SR5 PSU. Also modded Lentek head amp and Denon AU-310 SUT.

    Other Cartridges: Nippon Columbia (NOS 1987) Denon DL-103. USA-made Shure SC35C with NOS stylus. Goldring G820 with NOS stylus. Shure M55E with NOS stylus.

    CD Player: Audiocom-modified Sony X-777ES/DAS-R1 DAC.

    Tape Deck: Tandberg TCD 310, fully restored and recalibrated as new by RDE, plus upgraded with heads from the TCD-420a. Also with matching TM4 Norway microphones.

    Preamps: Heavily-modified Croft Charisma-X. Power Amps: Tube Distinctions Copper Amp, fitted with Tungsol KT-150s. Quad 306.

    Cables & Sundries: Mark Grant HDX1 interconnects and digital coaxial cable, plus Mark Grant 6mm UP-LCOFC Van Damme speaker cable. MCRU 'Ultimate' mains leads. Lehmann clone headphone amp with vintage Koss PRO-4AAA headphones.

    Tube Distinctions digital noise filter. VPI HW16.5 record cleaning machine.

    Speakers: Tannoy 15MGs in Lockwood cabinets with modified crossovers. 1967 Celestion Ditton 15.

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