Overview
The PreSonus HD9 is a pair of professional-quality monitoring headphones, which deliver loud, clear, and clean audio, while minimising 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.

Key Features
Fit and Comfort
Two-axis, 180° cup rotation
Comfortable, long-lasting ear pads
Adjustable headband
Sound
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
Specifications
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
Connectivity
Audio Connector 1/8" (3.5 mm) TRS
Connector Plating Gold
Adapter (Included) 1/4" (6.3 mm) TRS
Cable
Design Single-Sided
Detachable No
In-Line Remote/Microphone No
Cable Length 3 m