PreSonus HD9/HP4 Pack 4-Channel Headphone Amplifier with 4 Closed-Back Headphones

MSRP: $549.99
You save 36%

$399.99 $349.99

In stock

SKU: 673454006975 Category: Brand:


The PreSonus HD9/HP4 Pack is an HP4 4-channel headphone amplifier with four HD9 closed-back headphones, and is designed to deliver personal monitoring for up to four musicians, artists, or podcast guests in home, project, or commercial studios. The foldable, rotatable headphones utilize 45mm neodymium drivers to produce a frequency response of 10 Hz to 26 kHz. Connect them to the high-power, front-panel 1/4″ headphone outputs of the HP4, which also offers left and right 1/4″ output jacks for connection to studio monitors. The headphone amp accepts a stereo feed via 1/4″ inputs and features an adjustable headphone level per channel, switchable mono/stereo operation, adjustable monitor level, and a monitor mute switch.

HP4 – 4-Channel Headphone Distribution Amplifier

The HP4 from PreSonus answers the need for a headphone distribution amplifier with professional specifications in a small package at an affordable price. It is designed with four discrete headphone outputs on the front panel, each with its own volume potentiometer and 150mW of amplification per channel.

The HP4 also features adjustment capability for control-room monitors with a separate volume control, monitor mute switch and mono switch, thus giving you an extremely powerful monitoring solution at an amazingly low price.

Four High Power Headphone Outputs
The PreSonus HP4 manages four headphones with up to 150mW per channel. It features musical wide dynamic range, and control-room monitor outputs with level control.
Modular Add-On
This affordable unit can be added-on or added-to. The daisy chain configuration allows an infinite number of units to be connected.
Convenient Controls
There is no scrambling with this headphone distribution amplifier. With easy front-panel access you have push button mono or stereo operation, individual headphone level controls and a monitor mute switch right in front.

HD9 Professional Over-Ear Monitoring Headphones (Closed Back)

The PreSonus HD9 is a pair of professional-quality monitoring headphones, which deliver loud, clear, and clean audio, while minimizing listening fatigue. The HD9 sports 45mm dynamic, neodymium drivers with high-power handling (900mW per channel into 40 Ohms) and an extended frequency response from 10 Hz to 26 kHz for accurate bass response and precision mixing.

The closed-back, circumaural design keeps the sound inside the ear cups for isolation while tracking, while the adjustable headband and comfy earpads are designed for long listening sessions. The single-sided cable is 10′ long to provide plenty of slack, giving you freedom to move about your workstation or console. The 1/8″ stereo plug connects to a variety of professional audio devices. The PreSonus HD9 ships with a gold-plated 1/8″ to 1/4″ adapter and a storage bag.

Fit and Comfort

  • Two-axis, 180° cup rotation
  • Comfortable, long-lasting ear pads
  • Adjustable headband


  • Precision-tuned, closed back, circumaural acoustic design
  • Frequency Response: 10 Hz to 26 kHz (±3 dB)
  • Accurate low-frequency response
  • High-power handling (1800mW @ 40 Ohms, 900mW per channel)
  • 45 mm dynamic, neodymium drivers

Connection and Storage

  • 10′ straight, single-sided cable with 1/8″  connector
  • Gold-plated 1/8″ to 1/4″ adapter
  • Storage bag

HP4 – 4-Channel Headphone Distribution Amplifier Features

  • Number of Channels: 4
  • Input Connections: 1 x 1/4″ TRS Input
  • Output Connectors: 4 x High Power 1/4″ TRS Outputs
  • Maximum Output Level: -80dB to +10dB; 51 Ohm Impedance
  • Function Controls: Headphone Level, Monitor / Feed Output, Mono Switch, Monitor / Feed Mute
  • Frequency Response: 10Hz to 50kHz
  • THD + N: 0.002%
  • Noise: -98dB
  • Display: No
  • Dimensions: 5.5 x 1.75 x 5.5″ (140 x 44 x 140mm)
  • Weight: 5 lbs (2.3kg)

HD9 Professional Over-Ear Monitoring Headphones (Closed Back)

  • Driver Size: 1.77″ / 45 mm
  • Magnet Type: Neodymium
  • Design Over-Ear: (Circumaural)
  • Earcup Style: Closed-Back
  • Frequency Response: 10 Hz to 26 kHz
  • Impedance: 40 Ohms (Passive)
  • Maximum Power Handling: 1800 mW
  • Driver Type: Dynamic
  • Foldable: Yes


  • Audio Connector: 1/8″ (3.5 mm) TRS
  • Connector Plating: Gold
  • Adapter (Included): 1/4″ (6.3 mm) TRS


  • Design: Single-Sided
  • Detachable: No
  • In-Line Remote/Microphone: No
  • Cable Length: 9.84′ / 3 m

Additional information

Weight 15 lbs
Dimensions 9.1 × 8.7 × 4.5 in


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