PreSonus HD9 Closed-Back Circumaural Studio Headphones — 10 Hz - 26 kHz, High-Power Handling (1, 800 mW @ 40Ω, 900 mW per channel), 180° Rotating Cups

Built for professional monitoring and mixing, the PreSonus HD9 employs a closed-back, circumaural acoustic design to isolate sound and deliver precise low-frequency reproduction. The headphones feature two-way, 180° cup rotation for flexible single-ear monitoring and ergonomic positioning. Their tailored frequency response spans 10 Hz - 26 kHz to provide clarity across the audio spectrum. Designed to handle powerful sources without distortion, the HD9 offers high-power handling (1, 800 mW @ 40Ω, 900 mW per channel) for reliable, high-level performance in studio environments.