I was a little skeptical about this product based on some of the reviews I've read online (e.g., thumpy sounds, negatively affected sound quality, etc.), I did not experience anything like this, although I do agree with some of the reviews that instructions on how to best set up the limiter were lacking. But fortunately, some of the previous reviewers provided their own tips, which I employed and that helped me with my setup. So I'd like to share my own tips based on my use case in hopes that they may help someone else.I am in a band that runs its own sound, and I use my iPod to play break music. While the songs on my iPod have the same general ballpark output level, some songs would still play louder than others, and I'd have to run back to the stage to adjust the fader on the sound board. This limiter solved that problem.I started by setting the playback channel fader on the sound board to unity (nominal position for playback).On the Rolls SL33b Limiter: (1) Initially set the Gain dial to the 12 o'clock position and the Threshold dial to the 9 o'clock position; (2) Adjusted the Gain dial on the limiter to set the volume desired in the house; (3) Adjusted the Threshold dial until the red Gain Reduction light would slightly flicker. Using this setup, when louder songs played, the red light flickered less and stayed solid red slightly longer, which meant the limited was engaging. Note however, that this setup did NOT peg the Gain Reduction light at a solid red when a loud song came on, which would have meant extreme limiting. I did not experience any thumping noises or altered sound quality because the limiting in my case was not severe. This was probably due, in part, to the fact that the output levels of the various songs on my iPod were not drastically different from one another.Bottom line: This worked well for my use case, and I am very happy with the purchase.
Rating: [5 of 5 Stars!]