Read Research logo
Home Projects Utilities Articles Bespoke Shop Links Communication

2nd-order 2-way Subtractive Crossover


This is a single-board solution to a 2nd-order 2-way subtractive crossover. The high-pass section is formed from a 2nd-order unity-gain Sallen-Key filter, and the low-pass output is derived by subtracting the high-pass signal from the full range signal. Full input buffering is provided and the outputs are ready to drive any amp. Why not give it a go!

To work out the component values for the high-pass filter, check out the 2nd-order High-Pass Filter Designer on the Utilities page of the website. I recommend you choose a damped response such as Bessel to avoid a hump at the crossover frequency.



Schematic PDF of schematic

PCB Copper PDF of copper side of PCB

PCB Component PDF of component side of PCB


All content on this website Copyright © 2005-2024 Richard Read, unless otherwise stated. For commercial use please contact me.