Vintage style 3-band equalizer with a dual inductor based mid frequency band that was designed as a perfect complement to the GAP PRE-573 MKII rack preamplifier. It uses the class-A circuit which is similar to the EQ section in the classical 1073 module, with additional frequencies of mid and high frequency sections. Its sound character is warm, punchy, sweet and musical. The equalizer has stepped frequency controls that offers a wide selection of frequencies from 33 Hz to 15 kHz. The low and high frequency bands are shelving and the mid frequency band is of the bell type. The control range is +/-15 dB for the two lower bands and +/- 18dB for the high frequency band. All three bands can be set in an off mode. There is also a master bypass switch for easy comparisons. The high pass filter is of the inductor type with a slope of 18 dB/octave. Other features include tantalum capacitor in the signal path, TRS jack for in- and output connection and selectable ground lift switch. The equalizer cannot be used as a standalone EQ. It uses external power supply to avoid interaction with the audio circuitry. A 230V power adaptor is included.