The Presonus HP-4 is a four-channel headphone amplifier with professional features housed in a compact, stylish casing at an incredible price. All inputs and outputs of the Presonus HP-4 are equipped with 6.3 mm jacks and can be used in both balanced and unbalanced configurations. The mono switch on the front of the Presonus HP-4 routes the left/right input signals monophonically to all headphone jacks on the front panel. Each of the four headphone outputs of the Presonus HP-4 delivers an output power of 150 mW and has its own volume control. The input signal can also be routed to studio monitors via the monitor output of the Presonus HP-4, allowing for separate control or complete shutdown through the monitor mute function. The Presonus HP-4 is powered by the included plug-in power supply.

Details:

• Compact 4-channel headphone amplifier
• Input impedance: 10 k Ohm
• Volume control per channel (-80 dB to +10 dB)
• Output impedance balanced: 51 Ohm
• Noise: -98 dB
• Signal-to-noise ratio: >95 dB
• Power supply noise: >98 dB
• Steel chassis with aluminum front and side panels
• Weight: 780 g
• Dimensions: 15.8 x 15.8 x 4.3 cm

+ Keepdrum Stereo Headphones
Compact, lightweight stereo headphones for recording, mixing, or simply listening to music.

• Adjustable volume control
• Type: dynamic, semi-open headphones
• Driver diameter: 40 mm
• Impedance: 32 Ohm at 1 kHz
• Sound pressure level (SPL): 103 dB/mW at max power
• Rated power handling: 80 mW (max power)
• Frequency range: 20 Hz to 20 kHz at -3 dB
• Cable length: approx. 3 m
• Connector: 3.5 mm mini stereo jack
• Weight: approx. 175 g (total weight)
• Accessories: Adapter to 6.3 mm stereo jack.