FetHead is a low-noise, high quality, in-line microphone preamplifier. It provides improved sound for Ribbon and Dynamic microphones.
Ultra low noise Class A JFet amplifier
27dB amplification (@3 KOhm load)
Double single ended amplifier topology
4 matched jFets
24-48 v phantom power
If you're pre's aren't getting enough gain to your mics this is your solution. Commonly used for the SM7B