IGS Audio Rubber Bands Stereo Tube EQ Pultec Analog Equalizer

Many sound engineers believe that the passive equalizer is a cure for all digital evils. A distinctive characteristic of the IGS Audio Rubber Bands Equalizer is its stereophonic structure, where the manual selecting of components with an accuracy of 1% allows for perfectly synchronous manipulation of both channels. The inputs and outputs are transformer balanced.

The Rubber Bands EQ consists of two blocks: The first block is a classic passive filter well known from the EQP-1 Pultec equalizer. The second block is a specially designed two-stage tube amplifier called Organic Amp.

The new design includes a bypass relay, which allows you to instantly compare the results of your work. The equalizer has been divided into 4 sections: 2 for bass and 2 for treble. Frequencies are being selected with stepped switches. Boosting and cutting are controlled continuously. Manipulators featured are Bass Boost, Bass Cut, High Boost (with the choice of Q) and High Cut. Interactions of filters that allow simultaneous boosting and cutting of certain frequencies can produce amazing sound effects.

• All stepped manipulators: For frequency selection
• Boost/Cut Range: +/- 15 dB
• Hardwire bypass: Yes
• Q factor: 0.5 to 4

INPUT & OUTPUT
• Audio transformers: Yes, Carnhill, Edcor
• Input Impedance (balanced): 10k ohm, Carnhill transformer
• Output Impedance (balanced): 600 ohm, Edcor transformer

LEVELS
• Operating Level: +4 dBu
• Max input level: +18 dBu
• Max output level: +22 dBu
• Dynamic Range: 95 dBA @ 1kHz, +18dBu

BANDWIDTH
• Frequency response: 20Hz to 20kHz; +/- 0.3dB

DISTORTION (@ 20 HZ - 20 KHZ)
• Signal to Noise Ratio: 81 dBA
• THD: 0.25% @ 20-20kHz
• THD+N: 0.33% @ 20-20kHz
• IMD (SMPTE): 0.32% @ 20-20kHz
• Crosstalk: 80 dB @ 20-20kHz

POWER
• Voltage: 115/230V AC, 50 - 60Hz
• Power consumption: 34W
• Power supply: Internal

OTHERS
• Tube set: 4 x 6N1P (optional: 6BC8 or 6BC7)

IGS Rubber Bands Manual