Grado Master 3

To achieve the desired sound, we experimented with several longer curing processes that differ from the Opus3, Platinum3 and Sonata3 while using more modified materials. Each Master3 is individually calibrated after being built. Grado has modified their four-piece OTL cantilever technology to achieve a 10% reduction in tip mass compared to the Prestige series and use ultra-high purity long crystal oxygen-free copper (UHPLC) wire in the coils. The Platinum3 uses a specially designed elliptical diamond by Grado.

Grado has combined newly developed winding techniques with decades-old disciplines. A new two-step shielding process brings not only exact unison between the four coils, but a clear path for a cleaner signal.

Technical Specifications

Construction

• Cartridge type: Moving Iron
• Elliptical stylus
• Copper coil
• Cartridge body made of Australian jarrah wood

Audio Performance

• Frequency response: 10-60 kHz
• Channel separation: 30 dB on average (10-30 kHz)
• Compliance: 20 mm / N

Electrical Characteristics

• Load impedance: 10 kΩ - 47 kΩ
• Output level:
  • High: 4.0 mV at 5 cm / s (45°)
  • Low: 1.0 mV at 5 cm / s (45°)
• Inductance:
  • High output: 55 mH
  • Low output: 6 mH
• Resistance:
  • High output: 660 Ω
  • Low output: 70 Ω

Physical Characteristics

• Weight: 10 g
• Recommended tracking force: 1.6-1.9 g