I use this with Jim Kaufman's sunrise pickup and vintage Bill Lawrence pickups in my acoustic guitars. I play fingerstyle such as Kottke, Hedges, Juber, Van Ronk, Reed and Dadi. This adds clarity and fullness to notes especially in the low end. Extremely clear, distinct, and warm low end. Dead silent, zero noise with 140dB signal to noise. Hand made in the USA. Very high quality and road worthy. It has balanced di out, balance/unbalanced 1/4 out, 1/4 headphone out, and 1/4 thru. It has 1/4 input with adjustable input impedance from 10k to 2M, adjustable gain from 0 to 24 dB, ground lift and phase switches. This td-100 preamp has a +185V plate voltage on the 12ax7a. This preamp has lots of uses, but its ideal for sunrise and vintage Lawrence soundhole pickups for fingerstyle guitar!