DoggieHowser Posted May 31, 2017 Share Posted May 31, 2017 Thanks for posting this. If the compliance is listed as 5x10-6cm/dyne at 100Hz how do you make adjustment to use in this formula? A phono cartridge whose compliance is rated at 12 x l0?6 or below, is considered low compliance. A cartridge whose compliance is rated between 13 x l0?6 and 25 x l0?6 is considered high to very high. Note: Another way of expressing compliance is um/mN. Here a rating of 5 to 10 is considered very low, 10 to 20 is moderate and above 35 is very high. So the compliance of the cart in your example is 5. 1 Link to comment Share on other sites More sharing options...
Edd Posted May 31, 2017 Share Posted May 31, 2017 Thanks again, this has confused me previously. Link to comment Share on other sites More sharing options...
Owen Y Posted May 31, 2017 Share Posted May 31, 2017 16 hours ago, DoggieHowser said: Sound wise - yes it is a matter of taste, but when it comes to turntables, physics matters, hence the resonant frequency calculator. You do need to check the compliance of the cart vis a vis the effective mass of the tonearm/cart combo to make sure. Sorry Doggie, I didn't make it clear,....I was referring specifically to the Q of imped loading. Cheers, Owen http://darklanternforowen.wordpress.com/ Link to comment Share on other sites More sharing options...
Owen Y Posted May 31, 2017 Share Posted May 31, 2017 (edited) Chaps, Cartr-tonearm Resonant Freq: I have used various calculators (there are convenient ones online), but as usually the case, a pic is worth a 1,000 words: (Saves doing the maths (just add a gram or so for mounting hardware, to your cartr mass.)) As Doggie sez, conventional wisdom is that you want to end up in the 8-12Hz region. (Lower is better than higher, IMHO - as indicated by this Ortofon graph.) As said, it's not a right/wrong thing, there are variables involved. Cheers, Owen http://darklanternforowen.wordpress.com/ Edited May 31, 2017 by Owen Y 2 Link to comment Share on other sites More sharing options...
Owen Y Posted May 31, 2017 Share Posted May 31, 2017 10 hours ago, Edd said: Thanks for posting this. If the compliance is listed as 5x10-6cm/dyne at 100Hz how do you make adjustment to use in this formula? Chaps, Traditionally, Jap cartr manufs quote compliance @ 100Hz. At 10Hz (which is the region of resonant freq that interests us), compliance tends to be higher. There is not a universal straight conversion, but around 1.75 - 2.25x. eg. the above 5cu @ 100Hz, might be more like 9-10cu @ 10Hz - for res freq calc purposes. Taking the OP's Hana SL cart, compliance 20cu @ 10Hz & RB300 tonearm Eff Mass 11.5gm + say 6gm cart/screws...... Referring to the above graph, we see Res Freq at 8+Hz - pretty good. Always bear in mind that this technical stuff is a guideline only, there are variables. eg. Tonearm Eff Mass will vary depending on say.... (i) positioning of the arm counterweight, distance from the arm pivot - moving it closer will reduce Eff Mass, many tonearms have posiioning adjustment of +/- 10mm or more, which will increase/decrease Eff Mass. (ii) positioning of the cartridge in the h'shell slots - changes Eff Length & Eff Mass - a little. Cheers, Owen http://darklanternforowen.wordpress.com/ 2 Link to comment Share on other sites More sharing options...
DoggieHowser Posted June 1, 2017 Share Posted June 1, 2017 Apologies for going off topic but... Kiseki Purple Heart NS in the house.. Now I gotta wait for the rest of the table to get here... Link to comment Share on other sites More sharing options...
MattyW Posted June 1, 2017 Share Posted June 1, 2017 Gah, you've ruined the picture. Get that Apple product out of the photo!Jealous of the Kiseki though Sent from my Redmi Pro using Tapatalk Link to comment Share on other sites More sharing options...
DoggieHowser Posted June 1, 2017 Share Posted June 1, 2017 It's been tastefully blurred out 1 Link to comment Share on other sites More sharing options...
t_mike Posted June 1, 2017 Share Posted June 1, 2017 4 hours ago, MattyW said: Get that Apple product out of the photo! Or at least cover it with a lemon. 2 Link to comment Share on other sites More sharing options...
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