want to crank up your high-end headphone enjoyment a notch up the audiophile altar? then your answer might just lies with the Woo Audio WA7 Fireflies Headphone Amplifier, a “pure Class-A headphone amplifier with built-in Digital-to-Analog Converter. giving you the best of both worlds are the high-performance vacuum tube headphone amplifier that offers you enhanced clarity and warm sound, and an integrated built-in USB DAC designed to handle up to 32-bit/192K sampling rates, what you get is an uncompromising, audiophile-grade sound sent directly to your sound hole. on top of the audio pleasure, you will also be treated to Woo Audio equally uncompromising design in the form of a glass and all-aluminum chassis with no visible screws. basically, what you see is a minimalist and yet sleek audiophile-grade device that’s subtly bathed in the glow of the vacuum tubes while you sit back and savor the audio goodness. other features include a full-sized headphone jack and a dedicated mini headphone jack for in-ear monitors, selectable output signals, dual Nickel Alloy core output transformers, linear external power supply for amplification circuitries, custom built toroidal power transformer, and multi-layer military-grade PCBs. the Woo Audio WA7 Fireflies Headphone Amplifier comes in silver with clear glass and black with smoked glass, and can be yours to own for $999 a pop.