Thermionic Culture The Freebird Three-Channel Tube EQ

Sweet-sounding Tube EQ Makes Any DAW Sound Better




The Thermionic Culture Freebird three-channel tube EQ is based on a Baxandall circuit, which uses two highly-interactive shelving controls – one low, one high. This classic tube EQ voicing provides an extraordinarily sweet, dynamic and musical EQ. The innovative addition on the Freebird is a unique active mid/presence-boost control combined with a fixed-frequency mid-cut knob so you can really refine the EQ characteristics for your program material. Add in the two-position high-pass filter to help control problematic low-frequency content and a gain control for level-matching, and you’ve got that magic ingredient that can really add character to your tracks and mixes, especially on those occasions when you simply need a little ‘more.’

The committment 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.



Features

All-tube design for greater presence and naturality.
Completely free from solid state additives.
Single-ended (Class-A) design for highest audio quality with no crossover distortion
Classic Baxandall circuit architecture
Half-rack form factor makes for easy expansion




Get classic EQ sounds for your digital recording system. Order one today.





The Freebird Three-Channel Tube EQ Specifications:


Inputs: Three transformer-balanced “floating” XLR inputs accept balanced or unbalanced sources
Outputs: Three XLR unbalanced
Tube complement (per channel): Input - one 5965, Output - on PC86
Treble: +14/-16 dB @ 9 & 15 kHz
Bass: +/- 11 dB @ 50 & 100 Hz
Mid Cut: - 20 dB (max) @ 700 Hz
Presence: L – +3 dB @ 1 kHz, M – +4 dB @ 1.4 kHz, H – +3 dB @ 3 kHz & above, H+ – +5 dB @ 3 kHz & above, H++ – +8 dB @ 3 kHz & above
HPF: 12 dB/octave filter, 8 dB down at 25 & 65 Hz
THE FOLLOWING ARE MEASURED WITH ALL EQ CONTROLS SET TO “FLAT”
MOL: Max O/P level + 19.5 dBu @ 1 kHZ (for 1% distortion)
Noise: 99 dB below MOL
Frequency Response: +/- 0.5 dB from 26 Hz to 60 kHz
Distortion (THD): 0.02% @ 1 kHz, +4 dBu






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