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Fidelity Research FR-7fz Phono Cartridge
Here is a rare NOS unused FR-7fz LOMC cartridge from the legendary Ikeda-san.
Here is what Jonathan Carr, the designer of all the Lyra LOMC cartridges says:
Here you can see just how huge the magnet structure is, and if you understand cartridge design, the uniqueness of the 7’s innards will be very apparent. The magnet structure alone would spill over the body sides of any non-integrated headshell MC cartridge (at least that I am aware of), and underscores why FR never made a non-integrated headshell version of the 7. From my perspective (that of an active cartridge designer), the closest thing to a non-integrated headshell version of the FR-7 was the PMC-3, but even this remained quite a way off. The FR-7 had a radically different coil former (cube-shaped), likewise for the magnetics (dual magnets, quad polepieces). IMO, the FR7s were by far the most interesting of FR’s MC designs, but the 7’s basic design concept dictated that they would always be big, heavy monsters, suited for relatively few modern arms… My favorite FR-7s are the f and fz. The very low coil inductance of the FR-7 implies that loading can be fairly flexible, so I wouldn’t be so concerned with the low impedance. Those who know of the legendary FR-7 range of cartridges, will appreciate that the FR-7fz is the ultimate (and final) version with its superb nude Line Contact, pressure-fitted stylus.
Fidelity Research FR-7fz SpecificationsFrequency Response: 10 Hz to 35 kHz
Channel Balance: 1 dB at 1 kHz
Dynamic Compliance: 13 m/mN at 10 Hz
Output Voltage: 0.24 mV at 1 kHz, 5 cm/s
Internal Impedance: 5
Tracking Force: 2.0-3.0 g, 2.5 g recommended
Stylus Tip: Pressure-fitted nude Line-Contact
Weight: 29 g (including integral headshell)
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Category: Electronics:Home Audio Stereos, Components:Turntable Parts
Location: Woollahra, NSW