PreSonus HP4 Headphone Amplifier 4-Channel

PreSonus HP4 4-Channel Compact Headphone Amplifier Product Features 4 screaming-loud 130 MW per channel stereo headphone amps Wide dynamic range Control room cue monitor w/ level control Daisy-chain multiple units Compact 1/3U rack-mount chassis Mono summing Product Specifications Item Weight: 4 pounds Product Dimensions: 5.5 x 1.8 x 5.5 inches.