I have a Roland RC‑30 looper pedal, but I want to be able to use a single microphone, set up so that I can use a foot pedal to switch the mic from the PA to the looper...
The transformerless, Class‑A DI input circuit from Phoenix Audio's DRS2 mic preamp has spawned a range of dedicated active DI products, the latest being the single-channel Nimbus DI.
Speaker decouplers aim to isolate speakers from the surface on which they sit. This newer, more affordbale DMSD 50 Pro design has been optimised for speakers weighing up to 12kg (ie. most nearfield monitors).