I use this buffer combined with two Mundorf mcaps, a 10K ALPS blue pot (I know that a 50K pot is recommended but I has this pot already), and a 50VA toroidal transformer to drive an Audiophonics HPA-S250NC power amplifier. It is placed between the amplifier and an old Parasound 1100/HD DAC. Great improvement in dynamics, bass extension and imaging, against a passive pot used before. Highly recommended.