

Sennheiser
Sound that has nothing to hide.
HD 505 Copper Edition Audiophile Headphones
The Sennheiser HD 505 Copper Edition reveals details you’ve never heard before. A wide soundstage immerses you in music, movies, and games. There’s no batteries, pairing, or hunting lost earbuds in couch cushions. It’s just pure, honest audio. Nothing more, nothing less.
Lightweight and durable, the HD 505 builds on the trusted HD 500 series, blending legendary performance with outstanding fit and comfort. We make the 120 Ohm transducers ourselves in Ireland. The analytic, precise fidelity extends from 12 Hz to 38.5 kHz. Fine-tuned damping ensures fatigue-free treble and balanced bass, while golden accents and velour ear cushions provide the VIP treatment you deserve.
Tech Specs
- Headphone Type: Wired Over-Ear
- Connection Type: 3.5mm plug (unbalanced)
- Impedance: 120Ω
- Driver Diameter: 38mm
- THD: <0.2% (1 kHz / 90 dB SPL)
- Sound Pressure Level: 107.9 dB (1 kHz / 1 Vrms)
- Frequency Response: 12Hz - 38.5KHz
- Acoustic Principle: Open-back
- Ear Cushion Material: Synthetic velour
What's in the box
- HD 505 headphones (Copper Edition)
- 1.8-meter cable with 3.5 mm straight plug
- 3.5 mm to 6.35 mm screw-on adapter
- Drawstring bag
- Documentations
HD 505
Wait, did that sound come from my room…or was it the recording? Beyond a certain level of fidelity, it can be hard to tell. No, we’re not trying to mess with your head. But this is one way the HD 505 might surprise you, especially if you’re new to high-end sound. Everything feels more real, you’re right in the middle of the action — without investing in big, expensive gear.

Features
Here are the reasons why?
- Discover the details you’ve been missing
- Light, comfy, and perfect for long sessions
- Sennheiser quality you can enjoy for years and years


“I never noticed that before!"
Have you memorized your favorite songs note for note? Possibly in fear of being dragged to a karaoke bar? Even so, there could be details you haven’t yet heard.
The HD 505 uncovers subtle audio details like a piano's return, a tube amp's hum, or a buried synth line. It delivers high-resolution sound for music, movies, and gaming, unlike lesser products with exaggerated bass and treble but weak mids.


High-end components and perfectly tuned acoustics
An optimized 120-ohm transducer from our own facility in Ireland delivers clear mids and extended treble.
The HD 505's transducer, with its magnet and diaphragm, is angled in open-back cups to create a vivid soundstage, placing instruments like a saxophone or piano in specific spots. Its wide frequency range (below 20 Hz to over 20 kHz) captures deep bass and high notes, with fine-tuned damping for smooth, detailed treble response.


Appealing accents and serious comfort
The sophisticated color accents of the HD 505 make a great first impression. But the HD 505 is more than just a glow-up.
Built on the HD 500 chassis, the HD 505 weighs just 237 g for lightweight comfort. With a soft synthetic leather headband and velour ear cushions, they offer low clamping force and a luxurious feel.


Seeking a long-term relationship
Some people get a little weird about headphones. Like a kid with a favorite blanket. And we feel you! Which is why these are built to last.
The HD 505 upholds Sennheiser's durable German engineering, featuring high-grade metal mesh ear cups and less plastic for a premium feel. Compatible with HD 500 series accessories and cables, with long-term availability of replacement parts like ear cushions.
Frequency response curve
Describing the HD 505 sound

Great treble
The extension of the treble in the highest octave and the peaks-free integration give the HD 505 a very transparent sound supporting its open-back design.
A deep and controlled bass
Being a headphone with analytical sound, the HD 505 has a bass that reaches deep but is not considered fat.
More neutral mids
The very neutral mids, which are well connected to the treble range, give the HD 505 a detailed and transparent listening experience.
More Information
What you need to know
The HD 505 features which characteristics?
- Analytical sound
- Lifelike depth and realism from open-back ear cups
- Wide soundstage
- Extended low-end reach
The HD 505 has a lightweight design of ... ?
At just 237g, the HD 505's lightweight design ensures comfort for extended listening.
The HD 505 features an impedance of?
The HD 505 has an efficient 120 Ω (Ohm) impedance for use with virtually any audio source.
The HD 505 has a detachable cable?
Yes, The HD 505 has a detachable 1.8-meter cable with a 3.5 mm plug.
The HD 505 includes a screw-on adapter that is terminated in what size plug?
The screw-on 6.35 mm adapter connects you to headphone amplifiers, audio interfaces, and most hi-fi sources.
The HD 505 features open-back earcups?
Yes, The HD 505 features open-back earcups which facilitate the natural expansion of sound waves.
The HD 505 features reduced clamping force for optimal fit and comfort?
Yes, The HD 505 features reduced clamping force for optimal fit and comfort.
The HD 505 has an extended low-end response that gets down to ___ Hz?
Superior detail retrieval and extended low-end reach (down to 12 Hz) create clear bass performance.
What type of earpads do the HD 505 feature?
The luxuriously soft velour earpads rest around the ear for long-term comfort.
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