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Item # H81668

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Thermionic Culture Early Bird 2.2 Dual-Channel Tube Preamp
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      Thermionic Culture Early Bird 2.2 Dual-Channel Tube Preamp (H81668)
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The tonal sweetness of an all-tube design matched with incredible versatility

There’s nothing that sounds quite like a great tube mic pre. The Earlybird 2.2 stereo mic/line preamp and EQ from Thermionic Culture uses a unique balanced push-pull circuit to provide loads of headroom and minimal distortion, all with an exceptionally low noise floor. Coupled with Earlybird’s switchable input impedance and optimized transformer design, this circuit provides incredibly natural, transparent audio quality with virtually any sound source and microphone combination. The built-in active “Varislope” EQ plus available permanent connection for the Thermionic Culture Pullet passive EQ enables a huge range of tone-shaping and sculpturing possibilities.

Unlike many mic pres, the Earlybird 2.2 is also capable of adding sonic character after tracking with line level inputs available for mixing and mastering use when you need that extra little bit of personality to make your tracks truly come alive.

The commitment of Thermionic Culture’s founder, Vic Keary, to high-quality tube audio gear dates back to the first studio he built in the 1950’s, and his company has taken the best of what tubes have to offer, updating the circuits for the low-noise and distortion levels required for modern recording. Solid-state components are confined to power supplies so that the audio path is pure tube musicality.

Thermionic Culture Early Bird 2.2 Dual-Channel Tube Preamp Features:

  • Two-channel, all-tube mic preamp with EQ
    All-tube circuit with no solid state components in signal path ensure signal purity
    Custom-designed input and output transformers
    Switchable input impedance
    Unique “Varislope” active EQ curves


Thermionic Culture Early Bird 2.2 Dual-Channel Tube Preamp Specifications:

  • Input Impedance: Mic: 300 or 1200 ohms, switchable, balanced; Pad: 1.8kO; Line: 12.7kO’;Pullet: 1.2kO
    Output Impedance: <300O
    Maximum Gain: 62dB
    Maximum Output Level (MOL): +33dBm (36V RMS)
    Phase Shift: HF: 16 degrees (4.5%) @ 10kHz; LF: 0 within audible range
    Distortion (THD): 1kHz: 0.005%; 100Hz: 0.007%/0.012%
    Frequency response: +/-0.5 dB: 11Hz to 26 kHz; +/-1 dB: 8Hz to 65kHz
    Total Noise, unweighted, 30kHz filter: 114dB below MOL
    EQ, active controls @ max: Bass: +17dB @ 50 Hz; Mid: +15dB @ 800 Hz & 2.5 kHz; Top: +20dB @ 10 kHz
    Mid frequency selector: 800Hz & 2.5kHz
    Gain settings (dB): Mic: 36, 44, 52 & 60; Line:--8, 0, 8 & 16
    High Pass Filter (Hz): 0, 40, 100, 800
    Output trim: -18 dB to 0 dB linear reverse attenuator
    Input and output connectors: 8-XLR, wired balanced ( 2x mic in, 2x line in, 2x pullet in, 2x line out )
    Fuses: 115V: T1.25A 230V: T0.63A
    Tube Complement (2ea) — Input: ECC83 (equiv. 7025, 12AX7LPS); Output: ECC82 (equiv. 6189, 12AU7)


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