PreSonus HP4 4-Channel Compact Headphone Amplifier

Generate a 100-character excerpt from the product description below. Return ONLY the excerpt text, without any prefixes, notes, or explanations. Example: “Compact wireless speaker with 12-hour battery life and waterproof design.” Product description: Tired of straining to hear the headphones? The HP4’s four 130 mW headphone outputs are clear, clean, and screaming loud, all packed in a compact, 1/3U chassis. Features include balanced L/R line inputs and outputs, global mute, overall level control, and sum to mono. The line outputs can feed another HP4 or an HP60.
4 screaming-loud (130 mW per channel) stereo headphone amps
Wide dynamic range
Can serve as control room monitor control w/ level control & Monitor Mute button
Daisy-chain multiple units via 2 balanced ¼” monitor outputs
Compact 1/3U rack-mount chassis
Mono summing switch
2 balanced ¼” line inputs
Super-quiet with -98dB noise floor
Headphone level control