You asked and Lindell answered! The MID-500 is a classic passive equalizer and was created to satisfy the requests of Lindell's loyal users.  Based on the Pulteq MEQ-5 filters, the MID-500 is completely discrete and uses handwound Transformers, Inductors, Capacitors and Transistors in the signal chain for an exceedingly classy sound. 

The "MID-500" is a classic passive equalizer based on the Pultec MEQ-5 filters. This product is the most requested one from our users. It's completely discrete and uses only handwound Transformers, Inductors ,Capacitors and Transistors in the signal chain. A very classy classical sound.

Based on the classic Pultec MEQ-5 mid-band EQ, the MID-500 500-Series Passive EQ provides 3 bands of equalization centered on a selectable mid-frequency dip. It’s construction includes handwound transformers, inductors, capacitors, and transistors all geared towards supplying a vintage tone reminiscent of the MEQ-5.