More than 15 years, but 97HE type diamond mounted on Vintage Shure (Shure old cell) to higher impedance to achieve a much better listening to the entire audio band with excellent accuracy and transparency while reducing distortion. .. a 100% passive RIAA correction is recommended and on without any reaction against (my prototype is mounted in tube pentode-triode speudo). s'éfectue Listening without cover plate and presser + puck, arms and body door must be amortized ... (very important if you want to get any micro-detail of a true Shure). ... Finally the board of audiophile, take a good marker and paint the edges of your internal and external CD I present my personal marker on each side of the CD it gives me a slight advantage of overflow on a millimeter that I find beneficial, we gain in definition and accuracy throughout the audio spectrum ... it should certainly be the speaker or headphones able to appreciate these differences, good listener ... ULTIMATUMusicalement.