A 4-band EQ + High and Low Pass filter 500 series module based on the circuit found in the classic British 51 series recording console.

• High Pass Filter is 24dB/octave slope from 31.5 Hz - 315 Hz

• Low Pass Filter is 12 dB/octave slope from 4 kHz - 12.5 kHz

• Low Band - Push switch for Bell shape with a Q factor of 0.72 or a Shelf from 31.5 Hz - 315 Hz, +/- 17 dB.

• Mid 1 Band - Bell shape with Q factor of 2 from 200 Hz - 2 kHz, +/- 17 dB.

• Mid 2 Band - Bell shape with Q factor of 2 from 800 Hz - 8 kHz, +/- 17 dB.

• High Band - Push switch for Bell shape with a Q factor of 0.72 or a Shelf from 1.6 kHz - 16 kHz, +/- 17 dB.

The DIY KIT (Partial) option includes - PCB set (main, bottom, and top), 4 dual 10kC pots, 1 quad 50kB pot, screws, knobs, knob caps, ribbon cable, Build Guide documentation including full BOM and a Mouser Project cart to order the rest of the parts and build it yourself.

Mouser Project Cart: https://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=b3e8b1145e

Build Guide: https://www.dropbox.com/scl/fi/sn3usatimoj6urxggr6wp/DEAD-51II-EQ-rev-C-Build-Guide.pdf?rlkey=xu57bxqca3cb8sgnq13uiso58&st=59c1jw60&dl=0

BOM: https://www.dropbox.com/scl/fi/7wawf0g70smr6lilchwvm/51IIEQ-rev-C-BOM.pdf?rlkey=wcxejhirr3bn4kehq3tni0rua&st=429zx55b&dl=0