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