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Mods for the RB500

  • Open Plan RecordingOpen Plan Recording
    Mark Chierego’s mod features a single layer headbasket, removal of waffle plates and various acoustic filters, point to point solid core wiring, Australian made ribbons (1.8 micron 99.9% pure aluminium), matched with either a Samar Audio Design toroidal transformers or the Lundahl 2912.

Bidirectionalt.bone RB500

Bidirectional Ribbon Microphone

A reviewer at Harmony Central noted that the circuit boards inside the RB500 are marked “RSM-2,” supporting the common conclusion that this mic is another Alctron HRM-1 clone (with a modified grille).

Includes soft padded carrying bag, yoke mount and permanently-attached XLR cable.

The t.bone RB500 is also known as: RB-500.

The mic was released in 2004.


Pickup Patterns Pads & Filters
Bidirectional (1 mV/Pa; 30 - 18,000 Hz)
Ribbon Construction Impedance SPL/Noise
2'', 2-micron aluminum ribbon n/a Max SPL: 148 dB
Weight Length Max Diameter Interface(s)
n/a n/a n/a
  • 3-pin XLR male (1)
Power Specifications

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