PreSonus® HP4 4-Channel Headphone Amplifier, Blue, 220-240V EU

Features:
4 screaming-loud (130 mW per channel) stereo ¼-inch headphone outputs (front panel
2 balanced ¼-inch line outputs (monitor outputs)
2 balanced ¼-inch line inputs
Headphone level control for each channel
Mono summing switch for each channel
Monitor level control and mute switch
Daisy-chain multiple units via monitor outputs
Compact 1/3U rack-mount chassis
Sealed, detented, metal rotary controls
External 16 VAC power supply