Ortofon MC Diamond overview
The Ortofon MC Diamond is a low output moving coil cartridge that represents the pinnacle of Ortofon's engineering, drawing on more than a century of Danish cartridge design that began in 1918. It is built for the listener who wants the record reproduced with as little added character as possible, letting the pressing itself set the tone. Because it is a low output design, it delivers just 0.2 mV at 1 kHz, which means it needs a phono stage with a moving coil (MC) input or a step up transformer to make sound. It also needs a turntable and tonearm suited to its mass and compliance, points we will return to below.
Design and stylus technology
Two elements define the MC Diamond. The first is the cantilever, which is made entirely of diamond. Diamond is prized here for its extraordinary stiffness and low mass, which allows the cantilever to transmit the stylus motion to the coils with minimal energy loss or self resonance. The second is the stylus itself, a nude Ortofon Replicant 100 diamond, one of the most precise profiles Ortofon produces. The Replicant 100 has a very narrow contact radius that mirrors the shape of the original cutting stylus, so it reads deep into the groove and traces fine high frequency detail with excellent accuracy.
These two technologies work together. A diamond cantilever paired with a Replicant 100 stylus is Ortofon's approach to reducing the mechanical variables between the groove and the electrical signal. The cartridge carries a recommended tracking force of 2.4 g, an internal impedance of 6 ohms and a recommended load impedance greater than 10 ohms. Channel separation is rated at 27 dB and channel balance at 0.5 dB, both at 1 kHz, with a frequency response of 20 Hz to 20 kHz within plus or minus 1.5 dB. Compliance is 9 um/mN and the body weighs 10.5 g.
Sound character
The MC Diamond is designed for neutrality and resolution rather than a deliberately warm or forward voicing. The goal of the diamond cantilever and Replicant 100 combination is speed, low coloration and the ability to render very fine transient and spatial detail. Expect a wide and stable soundstage, tightly defined images and a treble that stays composed even on demanding passages. This is a cartridge that rewards clean pressings and a carefully set up front end, because it will reveal whatever is on the record.
Where it sits in the Ortofon range
The MC Diamond is a reference series cartridge, sitting alongside models such as the Ortofon MC Windfeld Ti and the Ortofon MC Verismo, both of which also use nude Replicant 100 styli and exotic cantilever materials. Each of these top references pursues the same design philosophy of low mass and low coloration, with the MC Diamond distinguished by its full diamond cantilever. Below the top references, the Ortofon MC 90X offers a low output moving coil option for listeners building toward this level, while the Ortofon MC A Mono is a dedicated mono cartridge intended only for mono LP records. Choosing among the references comes down to your tonearm, your system voicing goal and how you want to allocate your setup, rather than any single model being better than another.
Ideal turntable and phono match
Because the MC Diamond is a low output moving coil, the most important match is the phono stage. You need an MC capable phono input or a step up transformer that can present a load greater than 10 ohms and provide enough clean gain for a 0.2 mV signal. Options AEA carries that suit this level include the Luxman E-07 Phono Preamplifier, the Parasound JC3+ Phono Preamplifier and the MoFi Electronics MasterPhono MM/MC Phonostage, each of which offers moving coil loading and the low noise floor a reference cartridge deserves.
For the turntable and tonearm, the MC Diamond calls for a solid, well engineered deck with a tonearm that suits its 10.5 g weight and 9 um/mN compliance. The Luxman PD-151 Mark II and the limited Luxman PD-151 MKIIB Centennial Edition are natural partners, as is the MoFi Electronics MasterDeck Reference Turntable. If you would like a direct drive option, the Thorens TD 404 DD is also in the lineup. To complete an integrated system, the Luxman L-505Z Integrated Amplifier makes a musical hub.
How it compares to other moving coils AEA carries
If you are weighing the MC Diamond against other low output moving coils, the difference is one of design goal rather than ranking. The Audio Technica AT-ART1000x uses a direct power design that places the coils right at the stylus tip, an approach aimed at immediacy. The Audio Technica AT-ART20 and the Audio Technica AT-ART9XA with its non magnetic core, along with the Audio Technica AT-ART9Xi and the Audio Technica AT33xMLB, are dual moving coil designs each voiced with their own priorities. The MC Diamond distinguishes itself through its diamond cantilever and Ortofon's reference approach to low coloration. The right choice depends on your tonearm, your phono stage and the kind of presentation you prefer.
Setup thoughts
A cartridge at this level rewards patient setup. Aim for the recommended tracking force of 2.4 g and verify it with an accurate gauge. Careful attention to overhang, azimuth and stylus rake angle will let the Replicant 100 profile sit correctly in the groove and deliver its full channel separation and detail. Set your phono stage to a load greater than 10 ohms to match the cartridge's 6 ohm internal impedance, and give the cartridge time to settle in before making final judgments about its voicing.
Talk to AEA
AEA is an authorized Ortofon dealer with a showroom in Timonium, Maryland. Demo units rotate, so if you would like help matching the MC Diamond to your turntable, tonearm and phono stage, please reach out to us and we will guide you to the right combination for your system.