The attenuator was inserted between a wireless receiver and a microphone amplifier. Using the 20db pad for running a bass head's line out into a mic input on the mixer.

The oregon is about 50% less aggressive than the two files that came with pferd, but it fits. The only ones we use above this are nicholson, but not always in the right price range. High quality product form oregon.

When one buys 12 file one expect to get 12 files.