As the Swiss company explains, the Nagra Reference MC cartridge is the product of a number of years of intense R&D supplemented by extensive listening tests. The Reference MC cartridge features a number of significant and unique elements, and will be available in 4 and 6 Ohm variants. While traditional moving coil transducers utilize a single layer coil body, the Nagra Reference MC cartridge employs a multi-layer transducer featuring a double layer coil body wound with hyper-pure silver windings. The 6 Ohm Reference outputs 0.45mV @ 5cm/S. The 4 Ohm Reference achieves an output of 0.30mV @ 5 cm/S.
A stiff ruby cantilever is mated to a high strength titanium structure featuring a DLC (diamond-like carbon) coating. The titanium structure utilized in the coil body/cantilever interface addresses a traditional source of resonance and substantially reduces vibration unrelated to the musical signal. The stylus tip is a Swiss produced, Fritz Gyger S profile chosen for its wonderful combination of detail retrieval and musicality.
Further evidence of the obsessive attention to detail in the cartridge’s design is found in the connector pins. Those employed in the Reference MC cartridge eliminate the commonly found connection joint between the pin and the pure silver coil. In the case of the Reference MC, the pin is a continuous single piece from its external end point to its internal point of contact with the coil, resulting in a welcomed lowering of inductance.
In addition to the extensive focus on the generator system and groove / stylus / cantilever interface, Nagra’s team of engineers and designers paid great attention to the Reference MC cartridge body. Substantial material science investigation lead the team to a unique, non-ferrous alloy called Exium AM. Born from aerospace materials research, Exium AM is the result of a collaboration between the CNES (the French space agency equivalent of NASA), the Ecole de Mines de Paris and the French firm LBI Foundries.
Exium AM was developed to address the need for an alloy with very high damping properties – a necessary attribute for a particular Mars mission whose purpose was to measure minute seismic activities on the red planet. Nagra engineers determined that this high damping characteristic alloy was perfect for use in audio applications where the elimination of unwanted vibrations and resonances is an extreme priority. As a result, the Reference cartridge utilizes an Exium AM inlay at the critical interface between cartridge generator and the cartridge body. (An examination of Nagra’s 70th Anniversary Reference turntable will reveal that the table’s platter features a precisely CNC machined ring of Exium AM.)
Nagra’s use of this material is exclusive, since the company has secured the sole worldwide right to use Exium AM in audio products. In order to produce a cartridge of optimal weight for the Reference Anniversary tonearm, while maintaining high internal damping properties, a proprietary super magnesium alloy is utilized for the balance of the cartridge body.
Other relevant specifications detail compliance at 12 μm/mN, a channel balance below 0.5dB, and crosstalk above 30dB with 2 to 2.2g tracking force. Weight of the cartridge is 14.3 g including the FGS stylus, titanium / ruby cantilever.
The Nagra Reference cartridge will match most tonearms and phono stages but will reach its ultimate potential when paired with the Nagra Reference turntable/tonearm system and Nagra phono stages. With this announcement, the Swiss brand also reaffirms its commitment to becoming a leader in state of the art LP playback products.
Founded in 1951 by Stefan Kudelski, Nagra has been designing some of the most influencing equipment in the audio industry. In 2012, Audio Technology Switzerland S.A. formerly Nagra Audio division was created. Still largely owned by the Kudelski family, Audio Technology Switzerland designs, manufactures and market Nagra professional, high-end audio and security products, continuing the tradition that has established the brand for 70 years.
www.nagraaudio.com
