I use the triton FetHead with an RE320 - and a scarlett 2i2 - for online teaching (covid means teaching from home). Tried it with a 421, and a 57, and a beyerdynamic mkii, which all respond well.
Really simple to use, plug and play.
Nice clear clean gain boost once phantom power is on
No change to tone detected, but I haven't gotten Forensic with it, the boost in gain means less gain on the preamp, so no noise from lots of gain on the interface, and seems clean with long cable runs - haven't gone beyond 10m cable/run - but I'd trust it, and try it with a longer run, if the need arose.
It's plain and simple, - no features, no buttons or dials or switches, feels sturdy - not sure how it'd take a knock while in the microphone, (if it took a knock looks like it could damage itself or the microphone) but once it's unplugged it transports easily - very small, could fit in a pocket or a pouch on a backpack, very easily and seems like you could drive over it without any issues.
Very happy I bought it, immediately made me want to buy another - perhaps the germanium one.
Before I had the TritonAudio Fethead connected to my Rode Procaster microphone, I had to set the pre-amp gain to + 35 dB on my Rodecaster Pro interface. Now with the Fethead between the mic and the audio interface, I have the gain set to just 10 dB. Overall the sound quality is virtually the same. I can barely hear the Noise Gate activation with the Fethead attached, however the EIN floor is -130 dBu with the Fethead, as opposed to the Rodecaster Pro EIN of -125 dBu. Therefore, I have slightly better SNR (Signal-to-Noise Ratio) as the signal is stronger at lower pre-amp gain, plus the noise floor is lower, by around 5 decibels. The sound quality is extremely clean when recorded directly into my computer using Adobe Audition. So, I am very pleased with this product - it improves my input noise and means that I need very little audio interface gain to get a decent sound output.