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Thread: Magna Audio News & Product Updates

  1. #151
    Join Date: Feb 2010

    Location: Berkshire, UK

    Posts: 1,576
    I'm Tom.

    Default

    Quote Originally Posted by Ammonite Acoustics View Post
    If anyone with a Jelco arm is a bit puzzled why placing a weight on top of the arm structure can possibly be a Good Thing, my advice is to try it. In the first instance, just use a spare counterweight (usually the heavy one that comes with the arm), and place it carefully on top of the damping knob. Adding mass in this way, to my ears, greatly enhances the depth of sound and musical flow. It's free to try in the first instance and you can always get Steve to make you a nice shiny one that sits more securely on top of the arm if you like the effect.

    There's nothing pseudo-scientific or foo about why this works - one of the best ways of damping a resonant structure is to apply mass. That's all!

    This tweak also works with my FR64S and I will get Steve to make me another weight to sit securely over the top of that arm

    Interesting.

    I noticed a while back that there was a Microseiki base weight on offer, that screwed in under the arm board - rather than the usual nut, this was a very chunky 5-6cm deep heavy weight, that screwed in to 'stabilise' the armbase (into which the arm is secured by two grub screws). What would be the physics of that? Any damping effect from adding mass there rather than on top?

    My Ikeda armbase is exactly the same screw thread as the FR64S, also I guess the size means it could be done up quite tightly just by hand pressure. The Ortofon works a bit differently as the base is a sliding SME-type into a collar (the base secured to the armboard by four bolts, SME-style) so no potential for similar really. Neither are really amenable to adding mass from above ... the Ikeda has a round top over the bearing, so a bit harder to put a weight on top while the Ortofon has quite a narrow retaining ring for the bearing assembly.

    Speakers - 'RFC' Tannoy Canterburys with custom crossovers; Amp - Radford STA100; Preamp - EAR 912; Vinyl: Thorens TD124 MkII with Ikeda IT345-CR1 and Ortofon 309 Limited tonearms; Cartridges: Miyajima Kansui, Zero Mono and Premium 78, Ikeda 9TT, Ortofon SPU Royal N and SPU Mono GM MkII, and GE VX II vintage mono; phono stage and SUT from EAR 912; Esoteric Sound Re-Equalizer for early mono and 78; Digital: Audio Note CDT2/II transport and RPI2 with HifiBerry Digi+ board, heavily upgraded Audio Note Kit DAC.

    'Wer nicht liebt Wein, Weib und Gesang der ist ein Narr sein Leben lang.'

  2. #152
    Join Date: Mar 2009

    Location: The New Forest

    Posts: 917
    I'm Steve.

    Default Another Jelco arm damper weight

    This one for Peter. Will be in the post tomorrow.

    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.wix.com/magna-audio

  3. #153
    Join Date: Mar 2009

    Location: The New Forest

    Posts: 917
    I'm Steve.

    Default

    Nice looking and I'm sure nice sounding setup Tom.

    I bet I could make a domed one to suit

    Quote Originally Posted by montesquieu View Post
    Interesting.

    I noticed a while back that there was a Microseiki base weight on offer, that screwed in under the arm board - rather than the usual nut, this was a very chunky 5-6cm deep heavy weight, that screwed in to 'stabilise' the armbase (into which the arm is secured by two grub screws). What would be the physics of that? Any damping effect from adding mass there rather than on top?

    My Ikeda armbase is exactly the same screw thread as the FR64S, also I guess the size means it could be done up quite tightly just by hand pressure. The Ortofon works a bit differently as the base is a sliding SME-type into a collar (the base secured to the armboard by four bolts, SME-style) so no potential for similar really. Neither are really amenable to adding mass from above ... the Ikeda has a round top over the bearing, so a bit harder to put a weight on top while the Ortofon has quite a narrow retaining ring for the bearing assembly.

    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.wix.com/magna-audio

  4. #154
    Join Date: Mar 2009

    Location: The New Forest

    Posts: 917
    I'm Steve.

    Default Fidelity Research FR64s tonearm damper weight

    This one is for Hugo's FR64s.

    Pictured atop my FR64s

    I will give it a listen this evening, before posting off to Hugo tomorrow.





    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.wix.com/magna-audio

  5. #155
    Join Date: Jul 2011

    Location: Northamptonshire

    Posts: 1,346
    I'm Peter.

    Default

    Interesting idea ... hope you'll post your findings
    Guitar for sale in 'Abstract Chat' sub-forum

    Rega Isis Valve. Platine Verdier. EAR 912. EAR 861. Tannoy Prestige Canterbury SE.

  6. #156
    Join Date: Mar 2009

    Location: The New Forest

    Posts: 917
    I'm Steve.

    Default Latest armboard and arm damper weight work

    SL-1210 Ebony armboard with SME mounting



    SL-1210 Ebony armboard with Micro Seiki armbase mounted



    Jelco arm damper weight



    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.wix.com/magna-audio

  7. #157
    Join Date: Nov 2016

    Location: North East England

    Posts: 250
    I'm Mick.

    Default

    Ok

    I have just tried this exact mod that Hugo started and it does give a sonic difference on my SL1210 with a SA-750 arm.
    The difference I am hearing is not massive but definitely a lot more deepness to the bass notes. So pretty happy with that for a small outlay. Also if anything it looks pretty good in stainless.

    Thanks Hugo for the heads up and also Steve for sorting it all out quickly to a high standard

    [IMG][/IMG]
    Technics SL1210 MK2, Ortofon 2M Black Cart, Isonoe isolation feet and boots, Mike New main bearing, Mike New ETP Platter, Oyaide RCA Tone Arm and speaker cables, Jelco SA-750D Tonearm. Oyaide HS-TF Carbon headshell, Timestep HE III External PSU, High Fidelity Crystal glass turntable matt, Blue LED upgrade, Denon AVR-2808CI Amp, Bowers and Wilkins DM602S3 Speakers,
    Black Rhodium Jazz power cables for amp and turntable, Angle Audiophile Reference 2 Battery Phono Stage.

  8. #158
    Join Date: Mar 2009

    Location: The New Forest

    Posts: 917
    I'm Steve.

    Default Thanks for Dubster68 for the photo, Here's another Jelco arm damper weigh

    Nice photo of the your deck and damper weight.

    This one is bound for Singapore

    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.wix.com/magna-audio

  9. #159
    Join Date: Mar 2009

    Location: The New Forest

    Posts: 917
    I'm Steve.

    Default

    Thorens TD-125 armboards are popular lately This one is with a SME cutout pattern

    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.wix.com/magna-audio

  10. #160
    Join Date: Mar 2009

    Location: The New Forest

    Posts: 917
    I'm Steve.

    Default

    Here are some shots of an interesting speaker binding post project. These will go on a bespoke amp.
    OFC copper, ebony plywood (I fabricated this using my vacuum bag press) and brass. Nice combo







    A Jelco arm damper weight pictured on the customers deck. This was the one that went to Singapore recently.
    Nice to see my ebony armboard and Ammonite uprated Jelco armbase resplendent there too.



    Fits neatly under the cover too.



    Here's the feedback about the damper weight sound change.

    "Hi Steve,

    The damper arrived earlier this week, but was travelling and I have just installed it on my Jelco arm yesterday.

    I am not good at describing sound, not a night and day improvement, very subtle but definitely sound better with the damper than without it.

    Thanks."
    Last edited by speedy.steve; 21-04-2017 at 09:31.
    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.wix.com/magna-audio

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