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Thread: Considering Croft RIAA RS phono stage. Any alternatives?

  1. #11
    Join Date: Oct 2016

    Location: Bolton, England

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    I'm Andrew.

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    Quote Originally Posted by Jimbo View Post
    No separate power supply.
    It's often accepted as irrefutable fact that a power supply in a separate box is automatically superior to a power supply in the main box. Not necessarily true. In fact, they're often inferior due to the regulators being located in the separate box rather than than close to the audio circuit where they should be.
    However, with a phonostage it does make some sense to have the mains transformer well away from the audio circuit - possibly in a separate box - to minimise hum pickup from the transformer's magnetic field.

  2. #12
    Join Date: Mar 2009

    Location: Knebworth, Herts

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    Nothing wrong with your cartridge. I used a MM3 with a Croft RIAA R for a long time and it was a great match. The RIAA R is considerably better than the standard unit and the RS model is another step up. You won't be disappointed. Glenn's stuff is fantastic value for money and his customer service is second to none


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    Analogue: Origin Live Resolution mk2,OL Encounter mk3c,MM III and isolator.Digital:CA 840C.Amplification:Croft RIAA R, Icon Audio LA4mkii,Icon Audio MB845 signature version.Speakers: Kef Reference 203/2 Cables: Mark Grant G2000HD. Speaker cable Van Damme Hi-Fi UP-LCOFC.Headphone: Grado PS1000,HD650,HD600,Icon Audio HP8 RCM DIY Moth

  3. #13
    Join Date: Jan 2013

    Location: Birmingham

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    I'm James.

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    Quote Originally Posted by RothwellAudio View Post
    It's often accepted as irrefutable fact that a power supply in a separate box is automatically superior to a power supply in the main box. Not necessarily true. In fact, they're often inferior due to the regulators being located in the separate box rather than than close to the audio circuit where they should be.
    However, with a phonostage it does make some sense to have the mains transformer well away from the audio circuit - possibly in a separate box - to minimise hum pickup from the transformer's magnetic field.
    So I am correct then. Thank you for confirming what i have suggested.
    VPI Scout 1.1 - Ortofon 2M Black - Croft 25R+ - Croft Series 7 - Spendor SP2

  4. #14
    Join Date: Oct 2016

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    Quote Originally Posted by Jimbo View Post
    So I am correct then. Thank you for confirming what i have suggested.
    Not exactly. A qualified confirmation, maybe.
    I think Croft's phonostages have onboard mains transformers. Not sure how hum-free they are. It can be done with careful layout. Removing the mains transformer to a separate box is an easy way to minimise hum but it does add to the cost quite considerably.

  5. #15
    Join Date: Oct 2012

    Location: The Black Country

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    I'm Alan.

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    It must be remembered that the Croft stages are MM only, so relatively easy to make hum free in one box, particularly standard width.

    The Vivant has a toroidal transformer in the box and is hum free at low MC levels. Much care with layout is needed but it can be done

  6. #16
    Join Date: Jan 2013

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    Quote Originally Posted by Firebottle View Post
    It must be remembered that the Croft stages are MM only, so relatively easy to make hum free in one box, particularly standard width.

    The Vivant has a toroidal transformer in the box and is hum free at low MC levels. Much care with layout is needed but it can be done
    Mine buzzes a fair bit.
    VPI Scout 1.1 - Ortofon 2M Black - Croft 25R+ - Croft Series 7 - Spendor SP2

  7. #17
    Join Date: Nov 2015

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    I'm Oliver.

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    Quote Originally Posted by Jimbo View Post
    Mine buzzes a fair bit.
    Buzzes mechanically or hums through the speakers?
    Analogue: Technics SP10 MK2 > Phonomac AT-1010 MK5 tonearm > Ortofon Kontrapunkt b > Wizard Jfet MC Valve Phonostage (Telefunken Valves)
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  8. #18
    Join Date: Apr 2009

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    Quote Originally Posted by RothwellAudio View Post
    Not exactly. A qualified confirmation, maybe.
    I think Croft's phonostages have onboard mains transformers. Not sure how hum-free they are. It can be done with careful layout. Removing the mains transformer to a separate box is an easy way to minimise hum but it does add to the cost quite considerably.
    The Croft RS phono stage is a 2 box design.

  9. #19
    Join Date: Oct 2016

    Location: Bolton, England

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    Quote Originally Posted by Jimbo View Post
    Mine buzzes a fair bit.
    Bear in mind that a phonostage can hum not because of its own internal transformer but due to being too close to another piece of equipment containing a large transformer. Could that be the problem?

  10. #20
    Join Date: Jul 2010

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    I'm Charlie.

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    Others to consider

    TRON Convergence GBP1000 MM or GBP1200 MC - built to order - you can specify the cartridge loading etc - super quiet circuit with low noise floor (inaudible on my 104 dB/W horns speakers) - great sound & stellar build quality

    EAR 834P - long standing stalwart in the valve phone stage line-up - probably bettered now by others at the price - GBP1204 MM or GBP1347 MM or MC
    R2R: Studer A820 1/2 inch 2 track; Otari MTR-12 1/4 inch 2 track; Sony APR 5003; Sony APR 5002; Studer A807/II. Vinyl: Platine Verdier Allaerts MC1B/Schroeder Model 2 Decca C4E/Hadcock 228 TRON Seven Reference phono. Other analogue source: Nakamichi Dragon with ANT4066 mods. Amplification: TRON Meteor preamp TRON Voyager 20B SET power. Speakers: Avantgarde Duo. Digital: does not compute

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