The Beckmann BRAKE These boxes are intended to be connected between tube amplifiers and speakers. The box works much like a water tap for the tones. As is known, the sound becomes rounder and "prettier" when the volume knob is approaching 50%, that's where it gets very strong noise. Do you have a Box from BECKMANN then just turning down the output level. This means that your amplifier sounds with the right sound, but much quieter, this is 100% infinitely adjustable. Another advantage of the attenuation is that if you are recording with a microphone can use sensitive large-diaphragm mics which may otherwise be difficult. the sound pressure, you will extend the frequency range and dynamics. Production unit: in my basement in Malmo, guaranteed handcrafted.