AMG 12J2

“… truly ingenious bit of engineering…” – Michael Fremer, The Absolute Sound, October 2012

Hear the 12J2 Tonearm

About

Bearing:

  • Dual-pivot design instead of standard gimbaled bearing
  • Vertical bearing technology inspired the technique used stabilize the rotor heads of helicopters
  • Uses two 0.5 milimeter thick spring steel wires allows for fine azimuth adjustment while eliminating bearing play
  • Horizontal axle made from hardened tool steel, precision ground to a backlash-free fit with needle bearing
  • Extremely precise and maintenance free
low_12J2-Bearing-Cutaway_thumb

12J2 Bearing cutaway

Armwand:

  • Aircraft-grade aluminum
  • Anodized aluminum tube controls resonance
  • 12 gram effective mass

Counterweight:

  • 2-piece with Teflon-decoupled sleeve

Copper Internal Wiring:

  • Multiple gauges of high quality copper

Magnetic Anti-skating:

  • Decoupled via ring magnet and 2 bar magnets
  • Magnetic fields isolated in a patented bearing housing

VTA:

  • Precision locking system allows for easy adjustment

Armboard:

  • Machined from solid aluminum
  • Bayonet mount with overhang calibration
  • Pre-cut for AMG and Graham fixed mount
  • Custom cutouts available

Additional information

Effective Length

304.8 mm

Distance from Pivot to Turntable Center

291.4 mm

Overhang

13.4 mm

Offset Angle

17.89 degrees

Effective Mass

12.2 grams

Null Points

Inner: 66.04 mm, outer: 120.9 mm

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