Rubber Bands

Have you ever dreamt about your own Pultec style EQ?

Great, here's your stereo unit.

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.

Organic Amp.

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.

Simultaneous cuts and boosts of similar frequencies give a professional feel.

Sound shape.

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.

Very good on vocals, guitars and strings – adds fat low end and crispy high frequencies.
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  4. Specification
  1. Basic features
    Boost/Cut Range +/- 15 dB
    Hard wire bypass Yes
    All stepped manipulators For frequency selection
    Q factor 0.5 to 4
    Input & Output
    Input Impedance (balanced) 10k ohm, Carnhill transformer
    Output Impedance (balanced) 600 ohm, Edcor transformer
    Audio transformers Yes, Carnhill, Edcor
    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 external
    Packing box
    Dimensions 70x50x30 cm
    Shipping weight 5 kg
    Others
    Tube set 4 x 6N1P (optional: 6BC8 or 6BC7)
  2. Files
    RB19 manual v1.pdf