This is a library of perfboard and single-sided PCB effect layouts for guitar and bass. I'm not an electrical engineer by any stretch of the imagination, just a DIY'er who likes drawing layouts. It is meant for the hobbyist (so commercial use of any of these layout is not allowed without permission) and as a way to give back to the online DIY community.

Monday, February 16, 2015

EarthQuaker Devices Monarch

This is a great sounding Orange amp emulator by EQD. The EQ controls allow you to boost those frequencies instead of just rolling them off. Lots of big burly Orange tone in this FET based circuit. I've laid it out so you can board-mount all 4 pots from the solder-side of the board using right angle PCB mount pots.


  1. hi, i didt today, works faim!i use 2n7000 intead the bs170, and the fets j201-mpf102-j201.the treble pot oscilate a little, so i put a 500kA.Chers from Argentina!Nice work!


    1. I try build this effect. Just clean sound when bypassed off mode. I use 2n5457 transistor

  3. If you're not getting much distortion from this, try changing the resistor coming off the source of q4 to 1k. The 47k resistor next to it should also be 470k.

  4. I've tried to build it, but it doesn't sound good. The EQ section is OK, except some squealing of treble pot. The pedal is fairly loud and could be used as a booster, but it lacks of gain and sustain. And the distortion itself is kinda gated/too compressed. So I'm disappointed. It was so promising build... Is there any way to make it sound better?
    Anyway, thank you for your job!