The Koetsu cartridges in the Platinum series are made from mineral rock. The versions vary according to the type of stone used. Each cartridge is made from a block of rock selected by a skilled craftsman. For this cartridge, each block of blue lace agate is chosen for its natural aesthetic and quality. The rock is cut into the final shape and carefully polished for a glossy finish. This process requires great expertise. It takes several hours so as not to crack the stone.
The electrical components are meticulously assembled to obtain a perfect magnetic balance and, hence, a finer, smoother and clearer sound quality. The coils are different from other models as they use a high purity (6N) silver plated copper compound. The magnetic system uses strong magnets: 'Platinum Magnets' that are made of a platinum alloy. This hypersensitive motor reacts to the slightest movement of the stylus in the groove. This results in a subtle sound quality and unrivalled precision. The stylus is conventionally fitted to a boron cantilever.
The Koetsu Blue Lace Platinum has a relatively low output level, which means that it should ideally be used with a preamplifier of the same high quality. Franck
Type: Low output MC
Body: Blue lace agate
Coils: Silver plated copper
Magnets: Platinum Magnet
Output: 0.4 mV
Frequency response: 20 Hz-100 Khz
Channel separation: 25 db
Internal impedance: 5 Ohms
Channel balance: 0.5 dB at 1 khz
Load resistance: 30 Ohms
Weight: 12.5 g
Compliance: 5 x 10-6cm/dyn at 100 hz