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Simone Sedda

Bang & Olufsen Beomic BM3 with stand

Designed by Erik Rørbæk Madsen in 1962

A fantastic looking microphone, tested and working.

Unique collector's item for a real B&O fan

Info from Beoworld: 

Features: No resonance peaks. Extremely smooth response. Bi-Directional – no side pickup. No frequency discrimination, front to back. High efficiency Nu-Metal transformer placed in microphone housing. Switch for muting and voice/music conditions. The miniature non-corrosive duraluminium ribbon was only 0.0001″ thick and its weight only 1.3 mg. This negligible mass prevented any resonance within the audio range. Shock and blast proof. Ball swivel for tilting to any position.

Specifications: Dimensions 195mm high, 30mm diameter
Impedance, switchable 50 ohms, 250 ohms and 40 Kohms balanced
Response M position: 20-11000 c/s +/- 2,5 dB
T position: 10 dB lower at 100 c/s
Sensitivity M position, 50 ohms: 88 dB below 1V/µbar
M position, 250 ohms: 81 dB below 1V/µbar
M position, 40 Kohms: 60 dB below 1V/µbar
T position, 4 dB lower

Response Frequency Characteristic:
M (Music) Position: From 20 till 11,000 c/s +/- 3 dB
T (Close Talk) Position (8-16″) Rolled off below 100 c/s: 12 dB
RTMA Microphone Rating GM (sensitivity): -158dB; Hum Sensitivity (RTMA) GH: -145 dB. RTMA Standard SE – 105. BM 3. Open Circuit Voltage Level: -88 dB, OdB = 1 Volt per Microbar
Output Impedance: Nominal 80 ohms
Rating Impedance: 150 ohms
BM 4. Open Circuit Voltage Level:
“L”-Position: -88 dB
“M—Position: -81dB
“H”-Position: -60 dB
OdB = 1 Volt per Microbar
Output Impedance:
“L”-Position:
Nominal at 1000 c/s; 100 ohms
Rating Impedance: 150 ohms
“M”-Position:
Nominal at 1000 c/s; 450 ohms
“H” position: 
Nominal at 1000 c/s; 60 k ohms
Rating impedance: 40 k ohms
Size: 7,75″ x 1 3/16″
Weight: 15 ozs approx.
Cable: supplied with 20 feet twin cond. shld.
Transformer type: 8016-JS for matching BM3 to a high impedance amplifier input available on special order
mounting: Bayonette detach to 5/8″ x 27 thread

Good - Number of items: 1 - Including: Ribbon microphone - + Extra item (see description)

Bang & Olufsen - BeoMic BM 3 Ribbon microphone

Audio Equipment

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today

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Dimensions

Height

Width

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Brand

Bang & Olufsen

Sony

Marantz

Technics

Akai

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Tube radio

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Speaker

Subwoofer speaker set

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Solid state amplifier

Headphone

Reel to reel audio

Blank audio cassette

Reel to reel deck 18 cm

Preamplifier

Cartridge and/or needles

Country of origin

Netherlands

Luxembourg

Mexico

United States

Europe

Material

Plastic

Metal

Rosewood

Condition

Excellent

Good

Very good

Mint

Various conditions

Very Good Plus (VG+)

Mint & Sealed (M&S)

Good condition - used with small signs of ageing

Excellent (EX)

Fair & Poor

Mint (M)

Good condition - used with small signs of aging & blemishes

Fair

As new - unused

As new, unused

Extras

No extra's

Power cord

Remote control

+ Extra item (see description)

Original user manual

Refurbished

Power supply

Power Adapter

Brochures

Case

No cables

Flight Case

Anti-pop Filter

Microphone Shock Mount

Period

2010-2020

2000-2010

1980-1990

2020+

Style

Contemporary

Colour

Black

Record Label

Various labels

Original/ Replica

Original

Music memorabilia type

Box Set

Tested and working

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1900-2000

After 2000

1400-1900

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Qualification

Reproduction/replica

Excellent - Number of items: 1 - Including: DAC - Digital Analog Converter - Power cord

DAD - Premium Digital Audio Denmark (DAD) AX24 converter system ( Gold Edition ) DAC - Digital Analog Converter

Mint - Number of items: 10 - Including: Blank audio cassette - Case

Sony - CDit II - CDit I - HF Blank audio cassette

Good - Number of items: 3 - Including: Remote control, Power cord

Marantz - MCR-603 Hybrid CD player

Excellent - Number of items: 2 - Including: Turntable - Power cord

project - Essential 2 Turntable

Excellent - Number of items: 1 - Including: Speaker set - + Extra item (see description)

Siltech - Siltech Classic Anniversary 770i RCA Cable 2.0m Speaker set

Fair & Poor - Number of items: 1 - Including: Microphone - Case

Philips - H100 Microphone

Mint - Number of items: 1 - Including: Headphone - Box, Power cord, Power supply

Marshall - Major IV Headphone

Excellent - Number of items: 2 - Including: Turntable cartridge with stylus - No extra's

Goldring - Goldring G850 Moving Magnet Cartridge with Original Stylus Turntable cartridge with stylus - Multiple models

Excellent - Number of items: 1 - Including: No extra's

Unda Radio - Modello "532 Triunda" del 1941 Radio

Very good - Number of items: 2 - Including: Audio component - Power Adapter

PreSonus - Monitor Station + Central Station Remote Audio component - Multiple models

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Bang & Olufsen - BeoMic BM 3 Ribbon microphone

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Audio Equipment

This object is no longer available, but there’s still lots to explore

Bang & Olufsen - BeoMic BM 3 Ribbon microphone

Popular in Audio Equipment

1096 objects

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