The Monolith Liquid Spark is a compact headphone amplifier developed by Alex Cavalli for Monoprice. It provides everything people have come to expect from a Cavalli Audio® design. It uses dual 18V filtered power supply rails to produce wide voltage swings for additional headroom. The Liquid Spark offers plenty of power at 1300mW RMS into a 50 ohm load, with very low distortion and switchable gain.