From IGS Audio

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. Due to its construction, passive equalizers’ culture is characterized by amazing sound. 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. Bands are 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 certain frequencies can produce amazing sound effects. 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 0.2% allows for perfectly synchronous manipulation of both channels. The inputs and outputs are transformer balanced.
 

Front Panel

Bypass/In - relay bypass

Low Boost frequencies
20, 30, 60, 100, 180, 240 Hz,
Low Atten frequencies
20, 30, 60, 100, 180, 240 Hz,
Bandwidth
Sharp - Wide,
High Boost frequencies
5, 6, 8, 10, 12, 16 kHz,
High Cut frequencies
6, 10, 20 kHz.
Specification
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Passive equalizer with tube Organic Amp,

XLR, transformer balanced inputs/outputs,

Nominal Level +4 dBu,

Smooth control
Bass Boost; Bass Cut; High Boost Q; High Boost; High Cut,

Step control for all bands,

True Bypass switch,

21 frequencies,

EQ Boost/Cut Range
15 dB,
Bandwidth range
1.5 to 3,
Frequency Response
20 Hz - 20 kHz (+0.1/-0.2 dB)

Maximum Input Level +18 dBu

Maximum Output +22 dBu

THD 0.25 % (@ 20 Hz - 20 kHz)

THD+N 0.33 % (@ 20 Hz - 20 kHz)

IMD (SMPTE) 0.32% (@ 20 Hz - 20 kHz)

Signal to Noise Ratio
81 dBA (@ 20 Hz - 20 kHz)
Dynamic Range
95 dBA (@ 1kHz, +18 dBu)
Crosstalk
80 dB (@ 20 Hz - 20 kHz)

Input Impedance 10 kOhm

Output Impedance 600 Ohm

Tube Complement
4 x 6N1P-EW,
Optional tube replacement
4 x 6BC8 or 6BC7,
Input transformer
Carnhill UK,
Output transformer
Edcor USA,
Power Consumption
34 watts,

110/230V AC switch, 50~60Hz,

Size
2U, 19",

External dedicated power supply,

Shipping Weight
8 kg.
Analog cure for digital disease
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