An affordable, 500 Series equalizer modeled after Pultec's legendary passive EQ design 
Compatible with all standard API 500 Series compliant racks 
All discrete design based upon the legendary Vintage OPA1731 amplifier for classic EQ sound 
Transformer coupled balanced inputs and balanced outputs provide pristine clarity 
3-step switched low frequency boost 30Hz, 60Hz, 100Hz +/-10% 
3-step switched high frequency boost 6kHz, 10kHz, 16kHz +/-10% 
3-step switched high frequency attenuation 10kHz, 15kHz, 20kHz +/-10% 
True bypass hardware preserves your sound quality when bypassed