The IGS Audio Tubecore is a 3U Variable-mu stereo compressor offering a High-Pass filter, a wet/dry mixer and the possibility to replace the tubes from the back of the unit, allowing for an even wider sonic palette.

The TUBECORE 3U is a fully symmetric transformer balanced stereo mastering compressor. The structure is based on the typical vari-mu solution. Apart from the classic INPUT, THRESHOLD and OUTPUT controls it introduces switchable high pass filter in the sidechain, parallel compression (MIX knob), independent ATTACK and RELEASE switches and user replaceable tubes accessible from the back of the unit.

The design of the Tubecore 3U is based on the possibility to replace the tubes. As a user, you can choose between a few types: 6N1P-EW (6N3P-EW) – standard set of tubes, “standard” IGS compression, 6BC8/6BZ8 – tight, transparent, punchy compression, 6386 – legendary compression, by famous twin triode, 5670 – deep and dark tube compression.

Every single TUBECORE 3U is hand made with high quality, matched components (1% metal film resistors, Wima caps). It is equipped with 6N1P-EW (6N3P-EW) NOS tubes and individually calibrated to give you the unique and unspoiled experience of one of the best vari-mu compressors in history. It is equipped with Carnhill and Sowter audio transformers.

DEVICE TYPE
Vari Mu Compressor Yes
BASIC FEATURES
All stepped manipulators 24 pole Elma switches
Sidechain HPF 120Hz, 60Hz, Off
WET/DRY Mixer 0 - 100%, 4 dB step
MID/SIDE Processing OpAmp M-S encode/decode
INPUT & OUTPUT
Input Impedance (balanced) XLR, 600 Ohm, Carnhill balanced
Output Impedance (balanced) XLR, 600 Ohm, Sowter balanced
LEVELS
Operating Level +4dBu
Max input level +22 dBu
Max output level +22 dBu
Dynamic Range >107 dBA (@ 1kHz, +24 dBu)
Max. gain +35dB
Max Gain Reduction 20 dB
TIME CONSTANTS
Attack: 0.1 - 30 ms
Release: 0.1 - 4s
BANDWIDTH
Frequency response 20Hz to 20kHz; +/- 0.2dB
DISTORTION (@ 20 HZ - 20 KHZ)
Signal to Noise Ratio 87 dBA
THD 0.12 %
THD+N 0.15 %
IMD (SMPTE) 0.32%
Crosstalk 82 dB
POWER
Voltage 115/230V AC, 50-60Hz
Power consumption 44 Wats
Power supply External
PACKING BOX
Dimensions 70x50x30 cm
Shipping weight 9kg
OTHERS
Tube set Standard: 6N1P-EW or 6N3P-EW, Optional: 6BC8, 5670, 6386

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