Reed 5T Tonearm

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Reed 5T Tonearm

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Reed 5T is our first appearance in the tangential tonearm domain. Featuring unique design, innovative technological solutions and high quality, and dedicated to a true audio passionate, it is one of the most advanced tonearms we have ever made.

Reed 5T technically is a tangentially tracking pivoted tonearm. It’s working principle is based on Thales’ theorem (if the center of a triangle’s circumcircle lies on the triangle then the triangle is right, and the center of its circumcircle lies on its hypotenuse) and the rule, that given three non-collinear points, it is possible to draw only one circle that has finite radius and passes through all three. (Fig. 1)

 

Figure 1

 

  • P1, O1, P3 – Thales’ semicircle,
  • Angles P1-A1-P3, P1-A2-P3, P1-A3-P3 are 90 degrees each,
  • Segments A1B1 = A2B2= A3B3 represent length of a tonearm,
  • B – Tonearm vertical axis,
  • P2 represents a center of circle, drawn through three points – B1,B2 and B3 (tonearm rotation axis),
  • P3 – Linear Sensor Array,
  • BP3 – Laser beam.

Arm tube suspension system is similar to one used in Reed 2G tonearm, and the tonearm’s turning part is based on low noise thrust-sleeve bearing. For angular rotation of tonearm we designed and built limited rotation sectional torque motor. Tonearm’s position is controlled by laser and linear sensor array.

Reed 5T has user-replaceable arm tube – feature, which allows to change tonearm’s effective mass yourself. Tonearm also has VTA and azimuth adjustments.

Reed 5T has following advantages if compared with pivot tonearms:

  • Smaller moment of inertia,
  • No need for anti-skating mechanism,
  • Max tracking error is +/- 5 Minute of Angle (MOA). (Figure 2). Pivot tonearms usually have max tracking errors up to 1.5 deg.

absolute error tonearm 5T

 

Figure 2

Reed 5T’s advantages compared to other tangential tonearms:

  • Few times smaller moment of inertia,
  • No need for complicated additional devices (air compressor),
  • Compact and sleek design.
  • Effective mass in both vertical and horizontal directions is similar
SPECIFICATIONS
Mounting distance 251 mm (platter diam.max.= 330 mm)
Tracking error +/- 5 Minute of Angle (MOA)
Effective mass 8-16 g, depending on armwand material (replaceable armwand)
Height adjustment compatible with 28÷48 mm height platters
VTA adjustment precision +/- 0.2 mm
Azimuth adjustment +/- 8 deg
Downforce range 10÷30 mN (cartridge mass 5.5 g – 19.5 g,(4.0 g – 25,0 g))
Traction Limited rotation sectional torque linear motor
Voltage direct 12 V, using battery power source Reed Source 12V

 

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