Hello Head-Fi!
Our HD 500 series audiophile headphone series is expanding today, with the HD 505. The headphone (and its name) deserves a brief intro, as our alpha-numeric system is receiving an update that will make it easier to identify our headphones going forward. Let's start with the fun stuff:
The HD 505 is a headphone welcoming those stepping into the world of audiophile listening. Those familiar with the HD 560S will find some tonal similarities here, but with a smoother top end that should appease longer listening with less fatigue. For those unfamiliar with that tuning, it is quite neutral and analytical. We think this will be an outstanding option for those wanting to get into this community and hobby with a strong price-to-performance ratio, or for the seasoned audiophile looking to add a lightweight "clean" option to fill out their collection.
Let’s take a closer look.
Check out the Head Gear page
Modularity is a key feature—the single-sided detachable 1.8m cable (~6 ft) with a 3.5mm plug (and included 6.3mm adapter) can be swapped out in seconds without tools--this allows for future upgrades like a balanced cable or an in-line microphone for added versatility.
@ericpalonen will be here to help answer any questions, with an HD 505 at the ready if you're looking for impressions, specific dimensions, or comparisons.
--- --- ---
A note about naming: Like many audio brands, we use an alphanumeric system for many of our products. With an 80 year anniversary on our heels, we have no doubt amassed an enormous catalog of product names....some of the rules we have established have been bent as the markets and products evolve. As of this writing, we're simplifying the names so that it becomes a bit easier to classify our products. While not perfect (and not entirely retroactive) our next few releases are a great demonstration of the new naming methodology.
The first letters classify the headphone at the widest part of the funnel: "HD" stands for Headphone, Dynamic, as it always has. IE is an In-Ear (dynamic), HE is Headphone Electrostatic, etc. This remains unchanged.
The next number (in this instance, "5") places the headphone in a performance series: HD 500, 600, or 800..again, unchanged.
The numbers after that is where we are going to tighten things up.
x20 will be reserved for closed-back models (example: HD 820, HD 620S)
x50 and x00 will lean towards neutral tuning (example: HD 800S)
x60 will lean towards a warmer tuning (example: HD 660S2)
xx5 will, in most cases, indicate a retailer limited release in your market (example: HD 505)
Our back catalog is full of exceptions and nuances, so feel free to ask any questions if you have them, and thanks for coming along with us on the journey!
Our HD 500 series audiophile headphone series is expanding today, with the HD 505. The headphone (and its name) deserves a brief intro, as our alpha-numeric system is receiving an update that will make it easier to identify our headphones going forward. Let's start with the fun stuff:
The HD 505 is a headphone welcoming those stepping into the world of audiophile listening. Those familiar with the HD 560S will find some tonal similarities here, but with a smoother top end that should appease longer listening with less fatigue. For those unfamiliar with that tuning, it is quite neutral and analytical. We think this will be an outstanding option for those wanting to get into this community and hobby with a strong price-to-performance ratio, or for the seasoned audiophile looking to add a lightweight "clean" option to fill out their collection.

Let’s take a closer look.
Check out the Head Gear page
An Introduction to True Sound
At the core of the HD 505 is a 120-ohm dynamic transducer, which is precisely tuned and manufactured at our state-of-the-art audiophile facility in Tullamore, Ireland. The open-earcup design and angled transducers replicate the natural imaging of nearfield loudspeakers, offering an expansive soundstage that pulls you into the front row of your favorite music, movies, and games.Timeless Design, Built to Last
The HD 505 inherits the trusted HD 500 series chassis, known for its lightweight build. The combination of a synthetic leather headband and metal mesh earcup covers gives it a sophisticated feel with plenty of protection for yourself and the transducers...weighing at just 237 grams, the HD 505 has a delicate touch with stability and a wide sweet spot over the ears.Modularity is a key feature—the single-sided detachable 1.8m cable (~6 ft) with a 3.5mm plug (and included 6.3mm adapter) can be swapped out in seconds without tools--this allows for future upgrades like a balanced cable or an in-line microphone for added versatility.

Availability
The HD 505 is available for pre-order starting today at sennheiser-hearing.com and depending on where you are in the world, will be available from select retailers only.@ericpalonen will be here to help answer any questions, with an HD 505 at the ready if you're looking for impressions, specific dimensions, or comparisons.
Specifications
- Coupling – Over-ear (circumaural), fabric earpads
- Acoustic principle – Open-back
- Transducer – Dynamic
- Frequency response – 12 - 38,500 Hz
- Impedance – 120 ohms
- SPL – 108 db @ 1kHz
- Total Harmonic Distortion – <0.2% @ 1 kHz, 90 dB
- Weight – 237g (without cable)
- Cable – 1.8m (~6ft) detachable with 3.5mm (⅛-inch) stereo plug; includes 6.3mm (¼-inch) adapter; single-sided entry
--- --- ---
A note about naming: Like many audio brands, we use an alphanumeric system for many of our products. With an 80 year anniversary on our heels, we have no doubt amassed an enormous catalog of product names....some of the rules we have established have been bent as the markets and products evolve. As of this writing, we're simplifying the names so that it becomes a bit easier to classify our products. While not perfect (and not entirely retroactive) our next few releases are a great demonstration of the new naming methodology.
The first letters classify the headphone at the widest part of the funnel: "HD" stands for Headphone, Dynamic, as it always has. IE is an In-Ear (dynamic), HE is Headphone Electrostatic, etc. This remains unchanged.
The next number (in this instance, "5") places the headphone in a performance series: HD 500, 600, or 800..again, unchanged.
The numbers after that is where we are going to tighten things up.




Our back catalog is full of exceptions and nuances, so feel free to ask any questions if you have them, and thanks for coming along with us on the journey!
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