This project is a clone of the Neumann W492EQ module created by Adiox, who also cloned the Studer 169 EQ. The EQ contains four bands: high/low shelves, and two adjustable midrange bands.

Notable Features:

• Uses NE5532 opamps-
• Low shelf: +/-15dB, 50-400 Hz
• Midrange filter: +/-15dB, 0.063-1 kHz
• Second midrange filter: +/-15dB, 1-16 kHz
• High shelf: +/-15dB, 3-10 kHz
• All filters have individual bypass controls
• Balanced input and output

Price: 20€ for PCB set

More info:

• PCBs available from PCB Grinder.
• Adiox’s original posting.