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Ortofon 2M Black Ordered... |
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Drewan77 
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Joined: 25 May 2013 Location: Chester,England Status: Offline Points: 1544 |
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 Posted: 17 Jan 2014 at 1:15am |
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Hi Kevin
In addition to my earlier posts on this topic - The 2M Black seems quite revealing of the original mastering. If you seek a slightly coloured or 'warm' glow to your recordings this may not be the cartridge for you. I have tried back to back CD and hi-res FLACs of the same music and the tonal balance is extremely close, almost indistinguishable apart from slightly more 'presence' and better timing (on the vinyl) Surface noise with the Reflex is very low on the best recordings, much less noticeable than when I tried another brand phono stage. My friend has a 2M Bronze and we originally demoed at the dealer at the same time - the Black just seemed that bit more refined and 'fuller' sounding. He already had his cartridge, I purchased mine from new. After almost 2 years and recently onto my second stylus, I still have no desire to change cartridge, it does everything I could ask for and I listen to a 'ridiculous' amount of vinyl  Like you, I await Grahams' further impressions with interest |
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Older than I once was, younger than I'll be
............................. Andrew |
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tyticom
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Joined: 10 Feb 2014 Status: Offline Points: 2 |
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Posted: 11 Feb 2014 at 1:57pm |
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Hello! I spent tones of time to resolve this "bee" problem with my ortofon 2m bronze on my technics sl1200. And it looks like that 2m series (I have both Red and Bronze) can't work good with original technics sl1200/1210 tonearm because of too heavy tonearm mass and it's all about resonant frequency of a system tonearm/cartridge which is coupled to the record by the compliance of the cantilever suspension. Resonant Frequency (of the cantilever) The acoustic frequency at which the cantilever will become excited and vibrate out of control. This frequency is measured in cycles per second. Also referred to as 'hz'. Resonant frequency of a cantilever is regarded as inescapable and the effect is controlled by manipulating this frequency to exist in a range below human hearing but not so low that it will become excited by external vibrations such as foot fall disturbance or that of a warped record. This ideal frequency range is 8 to 12 hz. The lowest of low organ notes rarely go below 20 hz. Footfall and record warps happen below 6 hz. The effective mass of a tonearm in combination with the compliance of the cartridge cantilever serves to determine where the resonant frequency of a given tonearm/cartridge match up will be. In general terms, arms with high effective mass fitted with cartridges of high compliance result in resonant frequencies that fall below the ideal range. At the opposite end, arms with low effective mass mated to cartridges of low compliance result in resonant frequencies above the desired range. Both extremes are to be avoided. Resonance frequency can be calculated by using the formula: f = 1000 : (2 x π x √ M x C) or f = 159,1543 : (√ M x C) where: f - Cartridge resonance frequency in Hz M - Total tonearm system mass which is a sum of Mass of cartridge, Mass of headshell+Mass of leadwire for cartridge and screws and Effective mass of tone arm (all values in gram) so what we have with 2m black...? Compliance, dynamic, lateral - 22 µm/mN (I'm not totally sure that it's exactly 22 and not more) Cartridge weight - 7,2 g Tonearm eff. mass (technics sl1210/1200) - 4,5 g screws + headshell leadwire (I use Ortofon LW-800S) - 1,3 g headshell (original for technics sl1200/1200) weight - 7,5 g (7,2 + 4,5 + 1,3 + 7,5) x 22 = 451 sqrt 451 = 21,2367 f = 159,1543 / 21,2367 = 7,3009 Hz That is not ideal.. and maybe it's why we have some distortion.. Maybe it's good idea to try KAB Tonearm Fluid Damper. I will try it soon. Cheers, Sasha |
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Graham Slee
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Retired Joined: 11 Jan 2008 Location: South Yorkshire Status: Offline Points: 16314 |
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Posted: 11 Feb 2014 at 2:13pm |
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Excellent article Sasha.
I use the Black PNP with its own headshell which I believe may be lighter than the Technics headshell? As that is a term in the divisor equation, then it may produce a result larger than 7 point 3. Also, how does the additional Technics counterweight factor into the equations? I personally have noticed no ills with the Black PNP on my SL1210. |
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tyticom
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Joined: 10 Feb 2014 Status: Offline Points: 2 |
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Posted: 11 Feb 2014 at 3:38pm |
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Weight of ...and now we don't mind screws and leadwire in our formula: (23 + 4,5) x 22 = 605 sqrt 605 = 24,5967 f = 159,1543 / 24,5967 = 6,4705 Hz That's not good... As I know counterweight and additional counterweight are not important for our equations. But))) The good news that you have no ills with your Black PNP on your sl1210 and all this rules shouldn't mind you. I still have some hi-frequency distortion (they stick to my speakers and make me unhappy) when play some records that I could short reduce by higher VTF (like 2 grams or more but dynamics completely died. I mean no more air). Changing VTA give me nothing and others cartridge like ATP-2XN or Shure WhiteLabel work fine. Also I have Van Den Hul MC-TWO Special cartridge with the same problems on Technics sl1210. PS sorry for my english Best, Sasha |
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CageyH
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Joined: 30 Apr 2012 Location: Toulouse, Franc Status: Offline Points: 1751 |
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Posted: 11 Feb 2014 at 4:49pm |
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SO Graham,
What do you think of the 2M Black? Are you happy with it? |
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Graham Slee
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Retired Joined: 11 Jan 2008 Location: South Yorkshire Status: Offline Points: 16314 |
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Posted: 11 Feb 2014 at 6:04pm |
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Great English Sasha, and good to see some math from somebody else...
So what do I think? It's a darn sight better than some of the highly acclaimed MMs - one in particular I'll not name but used to be a favourite of mine... seems QC has gone south (or is it east?) on that one. People tend to warn about Ortofon and fussy set-up (not meaning Sasha) but if mine isn't set-up right I can't wait to hear it when it is. The Black makes all my vinyl sound good! |
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That none should be able to park up and enjoy the view without a smartphone and the knowledge in how to use apps
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suede
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Joined: 25 May 2011 Location: Sweden Status: Offline Points: 1202 |
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Posted: 11 Feb 2014 at 6:19pm |
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How much VTF do you have on your Black now Graham?
Edited by suede - 11 Feb 2014 at 6:22pm |
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Proprius, Reflex M, Solo UL, Bitzie, CuSats & Spatia
--------------------------------- Johan |
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