Although I haven't been recording live shows for years, I have wished I had more clean gain for some dynamic mics and ribbons in my studio. The Dynamite looked like a possible solution, so I talked my
'better-half' into getting me one for the holidays. Running quick sound tests with a couple mics indicated it really does pump up the gain. And using a variable input impedance preamp, the gain stays constant until the load drops below 300 Ohms (dropped about 3 db with a 150 Ohm load).
I ran quantitative tests with Room EQ Wizard and found the gain of mine to be 28.9 dB and the noise level almost unmeasurable (about 0.4 uV referenced to the input, or -125.7 dBu, which meets the published spec). Distortion is low, 0.1%, constant level from 10 Hz up to 12 kHz, and almost entirely second harmonic. I can't measure audio above 24 kHz in my studio, so 12 kHz is the highest frequency I can use to measure a second harmonic, and a second harmonic 60 dB below the fundamental is inaudible.
From my tests the Dynamite truly meets its claims with lots of clean gain, ability to drive a low impedance, and is very ruggedly built.