The RB 500, also known as the Rubber Bands 500, is a passive equalizer that offers the design and sound of a Pultec EQ in a compact 500 module.

Pultec EQs are known for their warm and musical sound characteristics.
 
This module has a reduced size compared to conventional equalizers, but still retains important functions and features.

It is equipped with transformer balancing on input and output (IGS Custom) and a discrete driver circuit.
 
As an additional feature, the RB 500 has a true bypass switch.

This allows the equalizer to be completely removed from the signal path when it is not active to ensure that it does not affect the sound when it is not needed.
 
The Rubber Bands are a wonderful tool that can add multiple levels of color to different tracks or mixes.

The best part is that it is very versatile, with each setting producing clear and great sounds.
This device gives the engineer in the studio the ability to add their own personality to the music.
 
Passive EQ in Pultec style
True Bypass
Frequency selection:
     BASS: 20, 40, 60, 100, 180, 240 Hz (Boost/Cut max. 15dB)
     HIGH BOOST:  5, 6, 8, 10, 12, 16 kHz (max. +15dB, Q: 0.5 – 4)
     HIGH CUT: 6, 10, 20 kHz (max. -15dB)
Input impedance (balanced): 1 kOhm
Output impedance (balanced): 600 Ohm
Operating level: +4 dBu
Max. Input level: +20 dBu
Max. Output level: +22 dBu
Noise level: -99 dBA
Frequency response: 5 Hz to 20 kHz, +/- 0.1dB
THD+N: 0.012% at 0 dBu
Power consumption: 3,5 W