Topping Sennheiser’s 500 series, the full sized premium headphone offers near-audiophile levels of sound quality and exceptional wearing comfort thanks to the large ear cups and soft replaceable ear pads.
Open-back over-ear headphones for natural spaciousness and audiophile enjoyment
The open HD 599 deliver an impressively natural sense of space.
Sennheiser’s proprietary transducer technology
Powered by Sennheiser’s proprietary transducer technology, including the Ergonomic Acoustic Refinement (E.A.R.) design that directs the audio signal straight to your ears.
Contemporary design
Featuring a modern design that’s both attractive and ergonomic. A true delight for anyone who listens with a sense of discovery. Experience the latest expression of legendary Sennheiser sound with these brilliant headphones.
With the HD 599, you enter the world of audiophile sound.
Here you’ll experience exceptional, natural spatial performance delivered by high-quality, proprietary Sennheiser transducers. You may have heard headphones that are quite good. The HD 599 SE will show you what lies beyond. Be warned: there’s no going back.
The HD 599 feature an open-back over-ear design.
Large ear cups with soft, replaceable ear pads
Thanks to the large ear cups with soft, replaceable ear pads, there’s no pressure on your ears—just sound. Nothing will stop you from listening track after track and discovering what the HD 599 SE reveal—things you didn’t even realize you hadn’t heard.
Quality you can hear, see, and feel—that’s what the HD 599 are about.
Timeless ivory color scheme
The design feels premium—from the brown stitching on the headband to the matte metallic details on the ear cups and headband. Combined with the timeless ivory color scheme, these subtle accents create an immediate impression of substance and quality.
| Article number (SKU) | 506831 |
| Ear coupling | Over-ear |
| Acoustic principle | Open |
| Adapter | 1: 6.3 mm 2: 3.5 mm detachable |
| Cable length | 1: 3 m 2: 1.2 m |
| Weight | 250 g |
| Frequency response (speaker) | 12 Hz to 38,500 Hz |
| Impedance | 50 Ω |
| Sound pressure level (SPL) | 106 dB SPL (1 kHz / 1 Vrms) |
| Total harmonic distortion (THD) | < 0.1% (1 kHz, 100 dB SPL) |
| Wearing style | Headband |
| Transducer size | 38 mm |
| Active Noise Cancellation | No |

The dashed black line represents the Harman target, a reference frequency response developed based on consumer preferences. The blue line represents the measurement of the HD 599. In practice, it shows how much the headphone’s frequency response deviates from the target. However, note that the target is highly smoothed, and it is not necessary to strictly adhere to the Harman target for a headphone to sound good.
Harman Research:
The Perception and Measurement of Headphone Sound Quality – What Do Listeners Prefer?