Lyra Atlas SL Cartridge Magnet type??

Here in the US, one can buy small neodynium magnets at any good hardware store.  I bought a pkg of 3.  These are about the size of a dime. The magnetic field is so strong that one cannot easily get the magnets in the stack of 3 apart from one another; I had to use a sharp knife blade to do so.  I am using one to repair the door to our toaster oven.  It was spring-loaded to begin with, and the springs gave out. One of those dime-sized magnets now does the trick. 

My Ortofon MC2000 must have very few turns of wire on its coil, because the internal resistance is 2 ohms and the output is miniscule in terms of voltage.  But it has an enormously powerful magnet structure that can lead to destruction of the suspension, if you bring any ferrous objects nearby, like a screwdriver you might use to install the cartridge, or like a platter with ferrous content, or the rotor of the coreless motor of my L07D.  Such powerful magnets can exert a force on the weigh pan of certain digital scales we use for VTF, even though they are advertised to be "non-magnetic".  Which of course can lead to inaccurate setting of VTF.

to count we have 5 options in the cartridges available
neodymium
samarium-cobalt
cobalt-platinum
alnico
FC
All of them are have different magnetic properties. So if engineer is good one he can use advantages and mask disadvantages.
IMO if you know what are you doing you will get desired result. 

I think the factor of magnet strength has more to do with the design aspect of the cartridge motor...and possibly how quickly the coils will react to the signal. Personally, I think the trend to ever lower output cartridges is a negative aspect when it comes to cartridge ability. While the lower output is connected to fewer turns of the coil, thereby theoretically reducing losses at this point, I believe that this is more than off-set with the issue of increased noise at the phono stage...due to the phono stage now having to work harder ( and sometimes a LOT harder) to amplify the smaller signal. While some ss phono stages are still relatively low noise as they increase their amplification, almost no ( maybe 100%) tube based phono stages can say the same thing. Even with the ss phono stage ( or the transformer stage) the increase in noise is most likely a factor as amplification increases.

for a given coil movement, cartridge output is simply the combination of flux and length of wire in that flux.  In order to change one you must change the other to get the same output.  The third side of this "triangle" is the cartridge impedance which shows up in the form of mass.  In order to reduce the mass of the coils you can either use fewer turns (less length of wire = less output) or the same number of turns of a thinner wire which increases impedance.  There is a current trend of trying to drive the turns and impedance down and still maintain a substantial output which is where the strength of the  N52 neo magnets come into the picture.

dave

Intactaudio...  “I am currently in the process of trying the exact same cartridge structure with Alnico 5, Samarium Cobalt and Neo to see what happens.” 

Can you report back on this matter.  I honestly want to know what the results are and see if one type of magnet does dictate the sound quality.