Grado Sonata 3

Although similar to its younger brother in some respects, the Sonata3 has a much longer build time as it undergoes extremely unique processes that only a few of our cartridges undergo. This longer and more complex practice produces a more colorful and deeper sound.

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

General Specifications

• Cartridge Type: Moving Magnet (MM)
• Ultra-high purity copper coil
• Weight: 9 g
• Compliance: 20 mm / N
• Recommended Tracking Force: 1.6 - 1.9 g

Audio Performance

• Frequency Response: 10 - 60 kHz
• Channel Separation: 30 dB on average - 10 - 30 kHz
• Load Impedance: 10 kΩ - 47 kΩ

Electrical Characteristics

• 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