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Mods for the HRM-2

  • OktavaModOktavaMod
    Michael Joly’s “standard” mod for long-geometry Chinese ribbon mics removes mechanical filters and adds acoustical damping, resulting in improved LF and HF extension, better HF detail, and reduced mechanical resonance. The “premium” mod includes retensioning of the ribbon and a Lundahl transformer.

Ningbo Alctron Electronics Co., Ltd. HRM-2

Pricing & Availability

  • MSRP: $58

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HRM-2 Documentation

BidirectionalNingbo Alctron Electronics Co., Ltd. HRM-2

Bidirectional Ribbon Microphone

The HRM-2 is an inexpensive Chinese ribbon design intended for wholesale to bulk importers.

Its specs are indistinguishable from the HRM-4, which has an XLR jack (rather than a fixed cable) and a slightly different grille shape.

The ribbon element is pure aluminum, 2 microns thick, measuring 50mm x 5mm.

The mic is capable of withstanding extremely high SPL (165 dB).

This microphone has been rebadged under many names, and turns up frequently in “group buys” organized through audio message boards.

The Ningbo Alctron Electronics Co., Ltd. HRM-2 is also known as: HRM2.

Specifications

Frequency Response - BidirectionalClick Graph to Compare!
HRM-2 Bidirectional Frequency Response Chart
Pickup Patterns Pads & Filters
Bidirectional (1.7 mV/Pa; 30 - 18,000 Hz)
Ribbon Construction Impedance SPL/Noise
Pure aluminum, 50x5mm, 2 micron ribbon 200 Ohms (Low) Max SPL: 165 dB
Weight Length Max Diameter Interface(s)
1230g (43.39oz) 185mm (7.28'') 69mm (2.72'')
  • 3-pin XLR male (1)
Power Specifications

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