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	Thermionic Culture Brochure
	Specifications
	Manual

The Earlybird 1.2 is a two channel mic pre-amp employing a balanced push-pull all valve circuit, which as far as we know is unique in this application. The use of this type of circuit gives seriously low noise, plenty of headroom and means a very natural interpretation of whatever sound the microphone is picking up, whether the mic is valve dynamic or FET.

The Earlybird 1.2 is very similar to the original Earlybird but has larger input and output transformers, giving a cleaner low end, still more headroom plus negligible phase shift and distortion at most used gain settings. The noise remains very very low.

FEATURES

• Gain – 5dB stepped control from 40dB to 60dB.
• Bass Filter – 0, 48, 96 Hz. Becomes more dramatic as the frequency drops.
• Pad – 20dB.
• +48v – latching toggle switch.
• Phase reverse.
• Output trim – reverse linear attenuators, operating after the electronics. Designed to be both fine level controls and to reduce the output to feed –10dBV systems.
• Metering- VU type with a compressed scale above 0VU.
• Impedance switching between 300 and 1200 ohms.

the Earlybird 1.2 Specifications:

Frequency response:

Less than 1dB variation between the ‘LF’ & ‘HF’ frequencies shown above.

Typical values for distortion, noise and phase shift