Thermionic CultureEarlybird 2.2 2CH Mic Pre + EQ

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Thermionic Culture Earlybird 2.2

The Earlybird 2.2 is a microphone preamp and EQ with two channels of valve pre-amplification and a circuit layout that makes use of a push-pull class A amplification that results in exemplary gain and low distortion/noise. Its input transformers were designed to provide high head room with a low phase shift amount. Additional features include a 3-band active lift EQ with integrated high-pass filters, switchable mids, and a function switch for configuring the unit for different intendments.

Earlybird's preamps feature front panel controls for gain, impedance, phase, and 48v Phantom Power. The EQ section makes use of a varislope curve in the unit's bass and top lifting controls. Conversely, the mid control lends an inherently musical curve that melds well with the top and bass controls for an array of tasteful shaping capabilities.

Users can combine the Earlybird 2.2 and Pullet for a glorious mastering EQ.

Earlybird 2.2 Features

  • 2 Channels of extremely high quality push pull' 'class A' type of valve pre amplification
  • 3 bands of active lift EQ with 2 mid range frequencies and switchable high pass filters
  • Clean gain, giving extremely low noise and distortion figures
  • Essential mic-preamp settings such as gain, impedance, 48v power and phase are all catered for by the front panel controls
  • Can be optimized for use with a large variety of mics, signal levels and different uses whilst remaining in an equipment rack
  • Function switch will allow the unit to take it's input from, mic. in, line, or the Pullet sockets
  • Massive clean output, but can be trimmed by output level controls, some coloration can be obtained if desired
  • Mic input impedance: 300Ω or 1200Ω, switchable, balanced
  • Pad impedance: 1.8kΩ
  • Line input impedance: 12.7kΩ
  • Pullet impedance: 1.2kΩ
  • Frequency response: ±0.5dB: 11Hz to 26kHz, ±1dB: 8Hz to 65kHz
  • EQ, active controls @ max: Bass: [email protected], Mid: [email protected] & 2.5kHz, Top: [email protected]
  • Phase shift:  HF: 16° (4.5%) @10kHz, LF: 0 within audible range
  • Mic gain: 36, 44, 52 & 60dB
  • Line gain: -8, 0, 8 & 16dB
  • Output impedance: <300Ω
  • Maximum gain: 62dB
  • Maximum output level (MOL): +33dBm (36V RMS)
  • Distortion (THD) @ 1kHz: 0.005%
  • Distortion (THD) @ 100Hz: 0.01%
  • Total noise, unweighted, 30kHz filter: 114dB below MOL
  • High pass filter (Hz): 0, 40, 100 & 800Hz
  • Output trim: -18dB to 0dB reverse linear attenuator
  • Input and output connectors: 8x3 pin XLRs, wired balanced
  • Valve complement: 2x12AX7LPS/ECC83/7025, 2x12AU7/ECC82/6189
  • Pilot light bulb: 24V/2.8W
  • Fuses: 115V: T1.25A. 230V: T0.63A
Thermionic Culture Earlybird 2.2 2CH Mic Pre + EQ Reviews