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Thread: Magna Audio's custom-made counterweight balance and armboard service!

  1. #541
    Join Date: Mar 2009

    Location: The New Forest

    Posts: 1,170
    I'm Steve.

    Default Customer feedback for the Birch plywood Tannoy GRF Narrow cabs I recently made

    Peter commissioned a pair of my Tannoy GRF narrow/tall style cabinets in premium birch plywood.
    I also modded the crossovers for bi-amping and changed all the caps and checks the resistors out.


    Dear Steve,
    Please feel free to include the text below in your customer feedback section.

    In spring 2018 I asked Steve to make me a pair of GRF Narrows. I had acquired from my father-in-law a pair of 15" Monitor Golds which he had had from new in early 1973. He had built unported cabinets for them which were close in dimensions and design to Tannoy Lancasters. I did not believe that the speakers were delivering all that they could, and were being held back by their enclosures. Treble was OK, but bass was curtailed and congested. Steve fitted the speakers into the new cabinets and I collected the finished job and installed them in my home. I have been listening for a week or so now, and all the expected benefits have become apparent. The stereo image is taller, wider and deeper, and much more stable than before. The whole sound is more lively, more credible. The bass is greatly extended, and much more taut and agile than before. Treble is cleaner and crisper. In short, the music simply dances.

    Hope all is well with you,

    Best regards,

    Peter

    A pic of Peter's current set up.

    System: Turntable : SP10 MKII slate plinth, Custom Ebony tonearm board, Arm : Fidelity Research FR64s, Cartridge : SPU Royal N. SUT : Lundahl 1:13. Phonostage : Icon Audio, Digital CD spinner, Serious USB->I2S streaming, ADC / DSP XO / Pre / 4 DAC's : WAF Najda, Poweramps : 3 x EL84 SET's, 2 x D class amps on bass channels, Speakers : 5 way front loaded horn system: 2 X Tapped sub 15" LF drivers / 2 X Exponential mid bass 15" drivers / Tractrix 200Hz mid horns with JBL2482's, / Tractrix 550Hz upper wooden horns with factory refurb'd Vitavox S2's / Raal Lazy Ribbons as high frequency tweeters. Wires: good silver or good copper where best suited. DIY RCM.

    Maker of counterweights, tonearm boards, Tannoy GRF style speaker cabinets, horn speakers and more.
    For more information about my creations and products please click below

    http://fosworld.wixsite.com/magna-audio & on Instagram https://www.instagram.com/magna_audio/

  2. #542
    Join Date: Mar 2009

    Location: The New Forest

    Posts: 1,170
    I'm Steve.

    Default

    Here's a solid ebony armboard for a Technics SP-10 / plinth.

    The original in plastic coated MDF weighed 325g.

    The ebony replacement weighs 803g









    System: Turntable : SP10 MKII slate plinth, Custom Ebony tonearm board, Arm : Fidelity Research FR64s, Cartridge : SPU Royal N. SUT : Lundahl 1:13. Phonostage : Icon Audio, Digital CD spinner, Serious USB->I2S streaming, ADC / DSP XO / Pre / 4 DAC's : WAF Najda, Poweramps : 3 x EL84 SET's, 2 x D class amps on bass channels, Speakers : 5 way front loaded horn system: 2 X Tapped sub 15" LF drivers / 2 X Exponential mid bass 15" drivers / Tractrix 200Hz mid horns with JBL2482's, / Tractrix 550Hz upper wooden horns with factory refurb'd Vitavox S2's / Raal Lazy Ribbons as high frequency tweeters. Wires: good silver or good copper where best suited. DIY RCM.

    Maker of counterweights, tonearm boards, Tannoy GRF style speaker cabinets, horn speakers and more.
    For more information about my creations and products please click below

    http://fosworld.wixsite.com/magna-audio & on Instagram https://www.instagram.com/magna_audio/

  3. #543
    Join Date: Mar 2009

    Location: The New Forest

    Posts: 1,170
    I'm Steve.

    Default

    Next step in the Technics SL-1210 mkII revamp project..
    Made up ebony sleeve and top for the on off switch and ebony switch plate got the start/stop and 33/45 rpm buttons.
    No plastic, chrome or silver finish in sight soon

    Next up an ebony pitch slider knob and rubbing the veneer down to smooth finish before sanding sealer applications, more rubbing and finally spray lacquering.

    Then it's onto to upgrade fitting and electrical mods

    System: Turntable : SP10 MKII slate plinth, Custom Ebony tonearm board, Arm : Fidelity Research FR64s, Cartridge : SPU Royal N. SUT : Lundahl 1:13. Phonostage : Icon Audio, Digital CD spinner, Serious USB->I2S streaming, ADC / DSP XO / Pre / 4 DAC's : WAF Najda, Poweramps : 3 x EL84 SET's, 2 x D class amps on bass channels, Speakers : 5 way front loaded horn system: 2 X Tapped sub 15" LF drivers / 2 X Exponential mid bass 15" drivers / Tractrix 200Hz mid horns with JBL2482's, / Tractrix 550Hz upper wooden horns with factory refurb'd Vitavox S2's / Raal Lazy Ribbons as high frequency tweeters. Wires: good silver or good copper where best suited. DIY RCM.

    Maker of counterweights, tonearm boards, Tannoy GRF style speaker cabinets, horn speakers and more.
    For more information about my creations and products please click below

    http://fosworld.wixsite.com/magna-audio & on Instagram https://www.instagram.com/magna_audio/

  4. #544
    Join Date: Mar 2009

    Location: The New Forest

    Posts: 1,170
    I'm Steve.

    Default

    Here's an ebony arm mounting block. Made to customer specification.

    Close tolerance grip fit for the armbase. 4 X threaded inserts for bolting the base down to the plinth..
    Should sound great.











    System: Turntable : SP10 MKII slate plinth, Custom Ebony tonearm board, Arm : Fidelity Research FR64s, Cartridge : SPU Royal N. SUT : Lundahl 1:13. Phonostage : Icon Audio, Digital CD spinner, Serious USB->I2S streaming, ADC / DSP XO / Pre / 4 DAC's : WAF Najda, Poweramps : 3 x EL84 SET's, 2 x D class amps on bass channels, Speakers : 5 way front loaded horn system: 2 X Tapped sub 15" LF drivers / 2 X Exponential mid bass 15" drivers / Tractrix 200Hz mid horns with JBL2482's, / Tractrix 550Hz upper wooden horns with factory refurb'd Vitavox S2's / Raal Lazy Ribbons as high frequency tweeters. Wires: good silver or good copper where best suited. DIY RCM.

    Maker of counterweights, tonearm boards, Tannoy GRF style speaker cabinets, horn speakers and more.
    For more information about my creations and products please click below

    http://fosworld.wixsite.com/magna-audio & on Instagram https://www.instagram.com/magna_audio/

  5. #545
    Join Date: Mar 2009

    Location: The New Forest

    Posts: 1,170
    I'm Steve.

    Default

    Here's the finished result of a totally revamped Technics SL-1210 mkII deck.

    New ebony armboard, new Mike New bearing fitted, new Mike New platter fitted, new Furutech mains cable / Furutech plug / Furutech tonearm / Furutech phono cable fitted.

    The deck has been veneered in striped ebony veneer, all the controls converted to ebony, all lights disabled.
    The pitch slider was retained but the knob is now ebony
    I even made an ebony 45rpm single record adapter.

    I fitted a new SME309 arm and setup the arm and Transfiguration Proteus cart up and performed listening tests to get it spot on.

    It's been a fun project and the proud owner is very happy indeed. More on that later.

    Some pics and a couple whilst listening.

























    System: Turntable : SP10 MKII slate plinth, Custom Ebony tonearm board, Arm : Fidelity Research FR64s, Cartridge : SPU Royal N. SUT : Lundahl 1:13. Phonostage : Icon Audio, Digital CD spinner, Serious USB->I2S streaming, ADC / DSP XO / Pre / 4 DAC's : WAF Najda, Poweramps : 3 x EL84 SET's, 2 x D class amps on bass channels, Speakers : 5 way front loaded horn system: 2 X Tapped sub 15" LF drivers / 2 X Exponential mid bass 15" drivers / Tractrix 200Hz mid horns with JBL2482's, / Tractrix 550Hz upper wooden horns with factory refurb'd Vitavox S2's / Raal Lazy Ribbons as high frequency tweeters. Wires: good silver or good copper where best suited. DIY RCM.

    Maker of counterweights, tonearm boards, Tannoy GRF style speaker cabinets, horn speakers and more.
    For more information about my creations and products please click below

    http://fosworld.wixsite.com/magna-audio & on Instagram https://www.instagram.com/magna_audio/

  6. #546
    Join Date: Apr 2011

    Location: London

    Posts: 3,134
    I'm Robert.

    Default

    Top job !!
    My System:
    Amplification - Sansui AU-alpha 707 DR
    Turntable - Modified Technics SL1210 MK5G
    Mike New precision bearing, bearing base plate, ETP Platter
    Micro Seiki MA-202 tonearm, rewired, hybrid ceramic bearings
    Ortofon Cadenza Black moving coil cartridge
    Yannis Tome 423.5 Silver-Litz tonearm cable with KLEI Pure Silver Harmony plugs
    Ebony armboard
    Audio Technica MS-8 Magnesium headshell, Ortofon pure silver headshell leads
    Isonoe Isolation Feet
    Paul Hynes SR7EHD PSU (plus regulator modules), DCSXL pure-silver DC lead with Jaegar low impedance connector
    CDP - Pioneer PD-91
    Speakers - Spendor D7
    QED Silver Spiral speaker cable, Airlock plugs - bare wire amp end.
    Mains - Ultra Pure silver plated un-switched socket, Missing link EPS 500 silver plated plugs with Hi-Fi Tuning gold plated silver ceramic 13 amp fuses

  7. #547
    Join Date: Mar 2009

    Location: The New Forest

    Posts: 1,170
    I'm Steve.

    Default

    Thanks Robbie. It was an exciting project.
    System: Turntable : SP10 MKII slate plinth, Custom Ebony tonearm board, Arm : Fidelity Research FR64s, Cartridge : SPU Royal N. SUT : Lundahl 1:13. Phonostage : Icon Audio, Digital CD spinner, Serious USB->I2S streaming, ADC / DSP XO / Pre / 4 DAC's : WAF Najda, Poweramps : 3 x EL84 SET's, 2 x D class amps on bass channels, Speakers : 5 way front loaded horn system: 2 X Tapped sub 15" LF drivers / 2 X Exponential mid bass 15" drivers / Tractrix 200Hz mid horns with JBL2482's, / Tractrix 550Hz upper wooden horns with factory refurb'd Vitavox S2's / Raal Lazy Ribbons as high frequency tweeters. Wires: good silver or good copper where best suited. DIY RCM.

    Maker of counterweights, tonearm boards, Tannoy GRF style speaker cabinets, horn speakers and more.
    For more information about my creations and products please click below

    http://fosworld.wixsite.com/magna-audio & on Instagram https://www.instagram.com/magna_audio/

  8. #548
    Join Date: Mar 2009

    Location: The New Forest

    Posts: 1,170
    I'm Steve.

    Default

    Ebony armboard for Technics SL-120. 1" thick solid ebony. Drilled for Alphason HR100s tonearm and with 4 mounting holes as required for the SL-120.

    Off to Hong Kong this one.



    Last edited by Magna Audio; Today at 11:37.
    System: Turntable : SP10 MKII slate plinth, Custom Ebony tonearm board, Arm : Fidelity Research FR64s, Cartridge : SPU Royal N. SUT : Lundahl 1:13. Phonostage : Icon Audio, Digital CD spinner, Serious USB->I2S streaming, ADC / DSP XO / Pre / 4 DAC's : WAF Najda, Poweramps : 3 x EL84 SET's, 2 x D class amps on bass channels, Speakers : 5 way front loaded horn system: 2 X Tapped sub 15" LF drivers / 2 X Exponential mid bass 15" drivers / Tractrix 200Hz mid horns with JBL2482's, / Tractrix 550Hz upper wooden horns with factory refurb'd Vitavox S2's / Raal Lazy Ribbons as high frequency tweeters. Wires: good silver or good copper where best suited. DIY RCM.

    Maker of counterweights, tonearm boards, Tannoy GRF style speaker cabinets, horn speakers and more.
    For more information about my creations and products please click below

    http://fosworld.wixsite.com/magna-audio & on Instagram https://www.instagram.com/magna_audio/

  9. #549
    Join Date: Mar 2009

    Location: The New Forest

    Posts: 1,170
    I'm Steve.

    Default

    Here's a replacement lateral weight for a Dynavector DV505.
    Correct weight, nylon insert and locking grub screw.

    Off to Australia this one.







    System: Turntable : SP10 MKII slate plinth, Custom Ebony tonearm board, Arm : Fidelity Research FR64s, Cartridge : SPU Royal N. SUT : Lundahl 1:13. Phonostage : Icon Audio, Digital CD spinner, Serious USB->I2S streaming, ADC / DSP XO / Pre / 4 DAC's : WAF Najda, Poweramps : 3 x EL84 SET's, 2 x D class amps on bass channels, Speakers : 5 way front loaded horn system: 2 X Tapped sub 15" LF drivers / 2 X Exponential mid bass 15" drivers / Tractrix 200Hz mid horns with JBL2482's, / Tractrix 550Hz upper wooden horns with factory refurb'd Vitavox S2's / Raal Lazy Ribbons as high frequency tweeters. Wires: good silver or good copper where best suited. DIY RCM.

    Maker of counterweights, tonearm boards, Tannoy GRF style speaker cabinets, horn speakers and more.
    For more information about my creations and products please click below

    http://fosworld.wixsite.com/magna-audio & on Instagram https://www.instagram.com/magna_audio/

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