Box of Hall
REVERB
Description
This design is largely based on the Belton BTDR-2 application note’s example circuit, but I added a high-pass filter tone control and changed up other filter cutoff curves as well. I also added an op amp buffer for the virtual ground (VREF) used to bias the other three op amps in the circuit. A subsequent version also added a wet feedback loop to allow for better control of decay time, as well as wacky ambient swell capabilities. I will post that version sometime in the future. But for now, this is a nice, simple reverb circuit that anyone can build and that will sound great.
There is a fair bit of modulation happening in all circuits using the BTDR-2 brick, and that’s something that’s just a part of the brick. You can’t dial it out (but apparently you can drill it out). But, it sounds pretty cool and adds a nice extra layer of complexity in the background. So if you like modulated reverb, you definitely want to build one of these.Media
Videos
Official Product Video (EN)
Links
Technical data
Width
000.00 mm
Depth
000.00 mm
Height
000.00 mm
Circuit type
hybrid
Voltage
9V DC, center negative