In a precedent post , I tried to spot different ways to power active circuits for guitars. The situation is not that simple and easy as one would like, but one can nevertheless get some sure benchmarks, usefull or problematics.
We also will have to remember that hum may sometimes not be caused by supply voltage, but by faulty connections …
What supply for what gear ?
Batteries and stabilized power supplies ensure an absence of noise.
• It is essential for distorsion boxes, three transistors fuzz and other high gain stompboxes.
• It is best for buffers, preamps, compressors placed at the head of chained stompboxes.
• Downstream connected equipments will appreciate their silence.
Digital pedals can work well with a basic power supply.