Our Passive Pre-Amplifier offers unprecedented musicality. Utilizing two passive isolating transformers for a balanced signal through the all five (5) inputs not only extends the frequency response it banishes noise associated with ground loops. Featuring an Elma switch with our 4 layer in house circuit board design and shielding with MuMetal(™) to prevent contamination from ultrasonic and RF interference. The beautiful bamboo case packed with natural dampening (fire resistant) sheep wool to produce a truly musical listening experience.