Thermionic CultureEarlybird 4 4CH Microphone Preamp


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Thermionic Culture Earlybird 4 4CH Microphone Preamp

The Earlybird 4, from Thermionic Culture, provides four channels of pristine preamplification in a compact chassis that is now available in red. Please note that this run is limited to just 49 units!

Earlybird 4 features simplified circuitry on each channel for an inherently natural and transparent sound. Its valve gain range extends from 3dB to 62dB and features switchable impedance for interfacing with different microphones.

On top of all that, the unit is entirely handwired, with a circuit design that incorporates push pull class A valve amplification. This allows the Earlybird to provide exceptionally clean gain for lower distortion. Additionally, the unit’s in/out transformers have been specially designed to afford low phase shift and high headroom, ensuring optimal performance no matter the application.

Earlybird 4 Features

  • 4 Channels of extremely high quality push pull' 'class A' type of valve pre amplification
  • Clean gain, giving the lowest noise and distortion figures possible in a mic. Amp
  • Hand wired with point to point wiring throughout
  • Lowest phase shift and highest headroom
  • Switchable input impedance to help in matching the unit with different microphones
  • Switchable 48V phantom power 
  • Switched gain 42 dB to 62 dB, 20dB pad
  • 2 position high pass filter
  • Variable output trim with phase inverter
  • Vu meters switchable between channels
  • Peak overload indicators
  • 4 Channels
  • Class A
  • XLR Inputs and Outputs
  • Input impedance: With Pad in: 300Ω or 1200 Ω, switchable, balanced 2kΩ
  • Output impedance: (a) Output level control at max 55Ω balanced, (b) Output level control at min 500Ω balanced
  • Maximum gain 62-64dB
  • Maximum output level (MOL) +34dBm
  • Distortion (THD) @1kHz/100Hz, unweighted, at 40dBgain, 0.0035% / 0.008%
  • Frequency response: ±0.5dB at 40dB gain setting >10Hz to<35kHz
  • Gain settings (dB): Mic 40, 45, 50, 55 & 60dB
  • High pass filter (Hz) 50 & 100Hz
  • Output trim -17dB to +2dB reverse linear attenuator
  • Input and output connectors 4 x 3 pin XLRs, wired balanced
  • Valve complement 4x12AX7LPS/ECC803/7025, 4x6189/ECC82
  • Pilot light bulb 12V/3W
  • Fuses 115V: T1 A, 230V: T500mA
Thermionic Culture Earlybird 4 4CH Microphone Preamp Reviews