I have upgraded my grey market ZYX Airy silver coil (from Juki) to official Premium ZYX 4D SB2 copper once. Those models are different. I have been used Airy-3 on EPA-100 with stock headshell of EPA tonearm with silver Van Ned Hul silver headshell leads and silver VDH internal tonearm cable. Later i bought official Premium ZYX 4D X SB2 and when i mounter it on ZYX Live 18 shell the improvement was so big that my girlfriend noticed that. The 4D is much better cartridge than Airy, well at leat for my music (jazz, funk, soul, latin from the 60s and 70s). I have noticed that i like copper version over the silver one (both low output versions used with ZYX CPP-1 pre-pre and WLM Minueta Referense Phono Stage).
Anyway i would like to read the review about 4D vs. Premium 4D.
Anyway i would like to read the review about 4D vs. Premium 4D.