Mic Archive
Bluebird
Photo: Blue Microphones, from its manual, p. 2.

Blue Microphones

Bluebird

Large-diaphragm solid-state condenser, cardioid, edge-terminated capsule, transformerless Class A

Type
Condenser
Pattern
Cardioid
Sensitivity
−31.4 dBV/Pa computed
Self-noise
7 dB(A)
Max SPL
138 dB SPL
Impedance
50 Ω
Rated range
20 – 20k Hz

Frequency response

Angle
Distance

Frequency response: from the manual, p. 3. "Bluebird Capsule Frequency Response" graph; dB scale +20 to -20, relative. Irregular (not logarithmic) frequency axis. Distance, room and smoothing not stated.

Dashed: outside the rated range, or simulated (other angles and distances). Hover or tap the graphs for values.

Polar pattern

Polar pattern: from the manual, p. 3. "Bluebird Capsule Polar Response" plot; rings labelled 5 to 25 dB. Measuring conditions not stated.

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All specs

From the manual
Capsulelarge diaphragm, edge-terminated, 6 µm gold-sputtered Mylar membrane; fixed (does not rotate or come off). "a pressure gradient large diaphragm condenser which employs an edge-terminated 6µ pure gold-sputtered mylar capsule membrane" ... "the Bluebird capsule is not designed to be removed or to rotate, swivel, or move in any direction".p. 3
Sensitivity−31.4 dBV/Pa (27 mV/Pa). Not stated by the manufacturer: Converted from "27.0mV/Pa at 1kHz" (20 log10 0.027 = -31.4).p. 4
Self-noise7 dB(A), IEC 651. "Noise Level: 7 dB-A (IEC 651)". Page 3 words it as "very low self noise specification (>7.5dB)".
Max SPL138 dB SPL, 2.5 kohm load, 0.5% THD. "138 dB SPL (2.5kΩ, 0.5% THD)".
Signal-to-noise ratio87 dB, A-weighted, IEC 651. "S/N Ratio: 87 dB-A (IEC 651)".
Dynamic range131 dB, 2.5 kohm. "Dynamic Range: 131 dB (@ 2.5kΩ)".
Output impedance50 ohm. "Output Impedance: 50Ω".
Rated load impedance1000 ohm, more than. "Rated Load Impedance: >1kΩ".
Rated frequency range20 Hz to 20 kHz. "Frequency Response: 20Hz – 20kHz".
Poweringphantom +48 V DC (IEC 268-15); works down to +35 V. "+48V DC Phantom Power (IEC 268-15)". Page 3: "designed the Bluebird to deliver outstanding performance with a power supply as low as +35V!"
Weight480 g. "Weight: 480g".
Dimensions222 × 45 mm. "Dimensions: 222mm x 45mm"; not said which is which (length × diameter, presumably).
Supplied accessoriesshockmount; pop filter. "The Bluebird Accessory Pak includes a custom shockmount and pop filter".p. 3
ElectronicsTransformerless Class A discrete amplifier (no integrated circuits)
Output level+12 dBV ("very high output level")
Recommended cableBlue Blueberry 22-AWG mic cable
WarrantyThree years from purchase (to the original, registered owner)p. 1

Documents

Each document is © Blue Microphones.

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