PreSonus HP4 4-Channel Compact Headphone Amplifier

It’s never good when session players and bandmates are straining to hear underpowered headphones in the studio, which is why PreSonus developed the HP4 headphone-distribution system. These headphone amps are louder than you’re ever likely to need for session and stage use, yet the sound is clear and clean, with a wide dynamic range. Simplicity is the HP4’s hallmark. You get left and right line inputs, left and right line outputs with level control, and the four headphone outs. You can sum the stereo signals to mono, adjust the individual headphone levels, and mute the rear-panel Monitor outputs while leaving the headphone outputs active. So while the HP4 is simple to set up and use, it has all the features you need to create a versatile headphone system. The compact HP4 can sit on a tabletop or can be screw-mounted to a standard rack tray (not included), where it requires just 1/3 rackspace. And if your needs grow, you can use the line outputs to feed the inputs of a second HP4 or the larger HP60 headphone amplifier.

Features

• 4 - 150mW per channel headphone outputs
• 2 - 1/4" balanced line outs (monitor outs)
• 2 - 1/4" line inputs
• Level control + mono/summing switch for each channel
• Monitor level control and mute switch

Specifications

• Number of Channels: 1 in, 5 out
• Dynamic Range: >115 dB
• Signal to Noise Ratio: >95 dB
• Headroom: +22 dBu
• Frequency Response: 10 Hz to 50 kHz
• Input Impedance: 10 kOhms
• Master Output Impedance: 51 Ohms
• THD + Noise: < 0.002%
• Internal Operating Level: +0 dBu = 0 dB
• Headphone Output Power: 150 mW
• Input Connectors: ¼" TRS
• Master Output Connectors: ¼" TRS
• Power Supply: External, Linear Supply
• Power Requirements: 16 VAC, 1000mA, 20 Watts
• Dimensions: 5.5" x 5.5" x 1.75"
• Weight: 4 lbs.