Klark Teknik Mic Booster CT1

This gives me around 1/4 turn more, on (most of) my pre gain knobs, audio technica mic.
I have listened hard and cannot hear any conceivable sound colouring to my voice/harmonica, but mic'd up guitar/mic booster does sound a little "compressed", a few tweaks on the eq and the guitar sounds great. Passive DI & electric guitar, with this inline are "OK" too, but passive DI's tend to compress a little.
I like to see people at the back talking while I perform, so I don't "blast" the punters, any small variations in my "preferred sound" are not too important. A little Sound colouring doesn't matter at all to most live performer's.
So this mic pre is a great weapon to have in the bag when using "house PA's".

The first thing you notice when you pick up the mic booster is it's weight. It's very heavy for it's size, which is a good thing. It has a premium feel, even though it's price does not set that expectation. The connectors can be a bit stiff, but may loosen.

But the most important thing remains: the sound.

It's simple: you won't notice it's there. There is no hiss, hum or buzz whatsoever. It gives a massive boost in signal, with no noticeable side-effects. Yes, if you crank the gain up to 11, you might hear a slight hiss. But that's true of most audio equipment.

For the price, you cannot go wrong!

It's so nice to have a booster that can directly be attached to the mic rather than having to connect an extra XLR wire. I'm using a Scarlett 2i2 as well as my newly arrived Shure SM7B. So far, it does the job splendidly. The boost is quite helpful and clean. No need to dial way up on my Scarlett 2i2. I would definitely recommend this booster for the price! Just a small caveat though: I work at a place with a radio station, so it picks up a bit of the transmission, but it's too quiet to be noticeable. It can easily be removed using a noise remover on your DAW. The vocals are pretty clean regardless. Go and get this!