Thermionic Culture THE EARLYBIRD 2.2 2 Channel mic, pre amp with eq - Manual (Page 13)

©Thermionic Culture Ltd., September 2010 12
6 Specification
Included are the figures for noise, distortion and EQ. They
are all measured with the Earlybird set up for 44dB mic gain /
0 dB line gain and a 10kΩ load.
Input impedance
Mic
Pad
Line
Pullet
300Ω or 1200Ω, switchable,
balanced
1.8kΩ
12.7kΩ
1.2kΩ
Output impedance <300Ω
Maximum gain 62dB
Maximum output level (MOL) +33dBm (36V RMS)
Distortion (THD) @
1kHz
100Hz
0.005%
0.01%
Frequency response
±0.5dB
±1dB
11Hz to 26kHz
8Hz to 65kHz
Total noise, unweighted, 30kHz
filter 114dB below MOL
EQ, active controls @ max:
Bass
Mid
Top
+17dB@50Hz
+15dB@800Hz & 2.5kHz
+20dB@10kHz
Phase shift
HF
LF
16
° (4.5%) @10kHz
0 within audible range
Gain settings (dB)
Mic
Line
36, 44, 52 & 60dB
-8, 0, 8 & 16dB
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