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Sennheiser HD 650 Open-Back Wired Audiophile Reference Headphones - Black

42mm transducers - 12Hz-41kHz - 300 ohm - Luxurious comfort - Detachable 3.5mm cable - Made in Europe - 2 Years Warranty

PB Tech price
PB Tech price
AUD $ 497 .35
$ 497 .35
$497.35  +GST
$497.35

Sennheiser HD 650 Open-Back Wired Audiophile Reference Headphones - Black

42mm transducers - 12Hz-41kHz - 300 ohm - Luxurious comfort - Detachable 3.5mm cable - Made in Europe - 2 Years Warranty

Expertly balanced acoustics, luxurious construction and timeless design.
  • Brand: Sennheiser
  • MPN: 508825
  • Part #: HSTSEN508825
  • UPC: 615104340497
7
PB Tech price
AUD $ 497 .35 $ 497 .35


Delivery: Order now and it ships on 29 Jun
Estimated Delivery Times
7 - 10 working days for international destinations

View all shipping info
$497.35  +GST
$497.35
  • Brand: Sennheiser
  • MPN: 508825
  • Part #: HSTSEN508825
  • UPC: 615104340497

Microphone

No

Rated Battery Life

N/A

Noise Cancelling

No

Wireless Technology

N/A

Interface

6.3mm

IP Rating

N/A

Colour

Black

Multipoint

No

What PB Tech customers are saying about this product...

See More Reviews

"These are a classic. They sounded good at release and they sound good now.

They're getting a bit old now in their design but they still sound fantastic. They require a decent amp ...view more"

TM
By: ThomasM858 30/11/25
Verified Owner

"I discovered that the reviews were correct. These 23-year-old headphones are true classics and a great purchase for those interested in audiophile quality listening. They present a ...view more"

PL
By: PaulL164 17/11/25
Verified Owner

"Sound quality is amazing, the cord is very long so you can move around with it, and the open back allows the sound to feel like its in your room rather than just your headphones."

EC
By: EricC24 27/10/25
Verified Owner

Features


HD 650

A benchmark for total audio immersion, the HD 650 reproduces the subtle details in your music with the same confidence as the highlights. With a fluid signature tuned for hours of fatigue-free listening, it is the headphone to reach for when the music matters most.

 

The (high) definition of smooth.

With expertly balanced acoustics, luxurious construction and timeless design, the HD 650 has all of the perks of a high-performance sports car and none of the quirks. This open-back headphone is beloved by audiophiles for its musical, non-fatiguing sound while still offering intimate levels of detail. Upon the first note, your favorite tracks reveal their true potential, and each moment of that performance becomes an opportunity to react all over again. For the hi-fi enthusiast that prioritizes engaging sound quality the HD 650 is an instant upgrade.

 

Imaging your Imagination

The HD 650's signature sound starts with our in-house acoustics. Audiophiles know that the best components perform at their peak when nothing stands in their way. It's no surprise that the response and dimensional soundstage of the HD 650 are smooth-its open earcups provide each and every soundwave ample room to expand as they would in nature. The 42mm transducer deploys a 38mm diaphragm with aluminum voice coil specifically tuned for extended, critical listening: overall treble and low-frequency presence are effortless while midrange is reproduced with lifelike composure-none sacrificing their organic roots to get there. Modern high-resolution sample rates benefit especially well from the HD 650's willingness to reveal subtle nuances without resorting to over-hyping the treble range. Each transducer manufactured is measured against rigid specifications and paired with a perfect match for consistent representation of the entire frequency spectrum in both channels. By reducing variances between left and right channels, the headphone reproduces mastering-grade sound independent of room acoustics or loudspeaker positioning.

 

Made For More

Everything about the HD 650 was made with more in mind: more details discovered, more musicality, and definitely more time for blissful listening. Made in Ireland at a state-of-the-art production facility, the HD 650 combines the best of modern transducer manufacturing with the attention to detail required to handle a wide variety of acoustic materials. Our production tolerances are extremely tight, ensuring that your HD 650 experience is consistent with those all over the globe, whenever or wherever it was purchased. For example, the resonators feature stainless steel mesh to guarantee uniform performance after manufacturing. Even better, most parts on the HD 650 are modular, making them a dream to keep as your go-to hi-fi playback headphones for as long as you cherish them. From the velour pads to the earcup grille pattern, each component was crafted to guarantee a next-level personal sound experience so you can enjoy your music even more.

 

It's All About Connection

Your HD 650 comes with a detachable, impedance-matched cable with ultra-low capacitance. The ¼-inch / 6.3mm stereo connector offers the audiophile-standard plug for connection to devices such as headphone amplifiers and A/V receivers, digital audio players, analog gear, and more. At 9.8 feet / 3m long, it offers unencumbered listening on gear deep within your shelves or in a favorite listening chair. A premium adapter is included to reduce the 6.3mm to 3.5mm / ?-inch for plugging into countless other audio devices.

Specifications

Wearing style

Headband

Color

titan

Frequency response (Headphones)

10 - 41000 Hz

Sound pressure level (SPL)

103 dB

THD, total harmonic distortion

< 0,05 %

Contact pressure

6.0 N ± 1 N

Connector

1/4* (6,35 mm) stereo jack plug

Adapter

1/4* (6,35 mm) stereo jack plug to 3,5 mm stereo jack plug

Cable length

3 m

Transducer principle

dynamic, open

Nominal impedance

300 O

Weight w/o cable

260 g

Manufacturer Part No:
508825
Brand:
Product Type:
Audiophile Reference Headphones
UPC
615104340497
Product Family:
HD
Shipping Weight:
0.6 kg
PB Part No:
HSTSEN508825
Product Model:
650
Warranty: 24 months *
* Warranty period is as stated above unless the manufacturer has chosen to specify a longer period.
All warranties are return to base unless otherwise specified.
Provide feedback on product content: If this product page is missing key information or you spotted a mistake please let us know.

Reviews

5 out of 5 Stars Based on 7 reviews
5 Stars
7
4 Stars
0
3 Stars
0
2 Stars
0
1 Stars
0

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Real solid built, high quality headphones.

Real well built headphones with a great sound especially when ran through an external dac/amp, great for gaming as well as music. A very detailed sound and great separation of the instruments on lots of tracks. Highly recommended to audiophiles.

WA
By: WilliamA37 07/04/25
Verified Owner
1 out of 1 user found this review helpful
Did you find it helpful?

Best Audio Ive Ever Experienced.

incredibly comfortable headphones with a solid build and satisfying adjustment, they feel sturdy and built to last. the quality of the sound is on another level, making many $3-400 pairs i have previously used feel like nothing in comparison. its extremely difficult to put into words the difference that is made with how large the sound stage is and i simply couldn't be happier with the purchase.

ND
By: NikitaD87 29/01/24
1 out of 1 user found this review helpful
Did you find it helpful?

Audiophile Classic

These are a classic. They sounded good at release and they sound good now.

They're getting a bit old now in their design but they still sound fantastic. They require a decent amp to drive them and unlock their full potential. They're very warm and lush sounding, but still have good technical detail. Their timbre is renowned. They're durable and they're easily repairable, as literally every part of the headphone can be replaced easily, so they'll last for years. I know of people who have functional 15+ year old pairs of HD600/650. These are an investment, but they're also a classic. They're not the best perfomance per dollar, but there's a r...view more

TM
By: ThomasM858 30/11/25
Verified Owner
0 out of 0 users found this review helpful
Did you find it helpful?

Smooth, neutral, precise.

I discovered that the reviews were correct. These 23-year-old headphones are true classics and a great purchase for those interested in audiophile quality listening. They present a smooth, detailed sound. Like all open back headphones they lack the sort of bass punch that has come to be the standard in most headphones and earbuds today, but that’s by design. The clarity and balance in the sound is wonderful.

PL
By: PaulL164 17/11/25
Verified Owner
0 out of 0 users found this review helpful
Did you find it helpful?

Great Sound Quality

Sound quality is amazing, the cord is very long so you can move around with it, and the open back allows the sound to feel like its in your room rather than just your headphones.

EC
By: EricC24 27/10/25
Verified Owner
0 out of 0 users found this review helpful
Did you find it helpful?

Real nice

Very impressed. Currently driving them with my FiiO K7 and it sounds fantastic! They are also very comfortable, I can wear them without fatigue for long periods.

BH
By: BonnieH15 14/07/25
Verified Owner
0 out of 0 users found this review helpful
Did you find it helpful?

Sennheiser HD 650

I like these they are a lot less bassy than the old headphones I used to use. They have a chrisper clearer sound.

DJ
By: DavidJ84 09/09/24
Verified Owner
0 out of 0 users found this review helpful
Did you find it helpful?

Delivery & Pick-up

Shipping Costs

Shipping costs vary based on your location and the items being shipped and in some cases shipping may even be FREE.

To calculate what the shipping costs will be for your order, add the items you are interested in to your cart, view the Shopping Cart page, and select your 'Delivery Area' to calculate the shipping cost.

Shipping Security & Insurance

All orders shipped by PB Tech are sent via a courier with a signature required for each delivery. In some cases, and only where you have given the courier company permission to leave orders at a designated location, your order may be delivered without requiring a signature. All orders sent by PB Tech are fully insured in the unlikely event that your item(s) are damaged or go missing in transit.

Delivery Estimates

The delivery time-frame (in days) for each product we sell is detailed on the individual product page just to the right of the main product image. From when you place your order, in-stock products typically arrive within 7-10 working days for all countries that we ship to.

Overseas Shipments

If you are located in New Zealand, you can order directly from our New Zealand site www.pbtech.co.nz. If you are located in Australia you can order directly from our Australian website www.pbtech.com/au

Returns & Warranty

7 day right of exchange

If you change your mind after making a purchase, or realise you have ordered the incorrect item, you can enjoy the peace of mind that we offer a 7 day exchange policy.

To exchange a product, goods must be sealed / unopened, with packaging in original condition, and accompanied by a valid receipt dated no more than 7 calendar days from when you request an exchange.

If there is not a suitable product that can be exchanged for your returned item you will be offered a credit on your account or gift card based on the value paid at the time of purchase.

Please note, items purchased on finance cannot be exchanged for a gift card.

 

Hassle free warranty service

If your product develops a fault within the manufacturer warranty period, you need to fill out our request a return form.

If your product develops a fault outside of the manufacturer warranty or PB Tech warranty period, we offer a full repair service and are an authorised repair agent for leading brands such as Samsung, HP, Toshiba, Lenovo and more.

 

Returning a product / making a warranty claim

To return a product to PB Tech, please complete our request a return form.

Or view our returns policy for more information.

Sennheiser HD 650 Open-Back Wired Audiophile Reference Headphones - Black 42mm transducers - 12Hz-41kHz - 300 ohm - Luxurious comfort - Detachable 3.5mm cable - Made in Europe - 2 Years Warranty

Expertly balanced acoustics, luxurious construction and timeless design.
  • Brand: Sennheiser
  • MPN: 508825
  • Part #: HSTSEN508825
  • UPC:615104340497
AUD $497.35

Date Created: 18:29, 23-06-2026
Product URL: https://www.pbtech.com/product/HSTSEN508825/Sennheiser-HD-650-Open-Back-Wired-Audiophile-Refer

Features


HD 650

A benchmark for total audio immersion, the HD 650 reproduces the subtle details in your music with the same confidence as the highlights. With a fluid signature tuned for hours of fatigue-free listening, it is the headphone to reach for when the music matters most.

 

The (high) definition of smooth.

With expertly balanced acoustics, luxurious construction and timeless design, the HD 650 has all of the perks of a high-performance sports car and none of the quirks. This open-back headphone is beloved by audiophiles for its musical, non-fatiguing sound while still offering intimate levels of detail. Upon the first note, your favorite tracks reveal their true potential, and each moment of that performance becomes an opportunity to react all over again. For the hi-fi enthusiast that prioritizes engaging sound quality the HD 650 is an instant upgrade.

 

Imaging your Imagination

The HD 650's signature sound starts with our in-house acoustics. Audiophiles know that the best components perform at their peak when nothing stands in their way. It's no surprise that the response and dimensional soundstage of the HD 650 are smooth-its open earcups provide each and every soundwave ample room to expand as they would in nature. The 42mm transducer deploys a 38mm diaphragm with aluminum voice coil specifically tuned for extended, critical listening: overall treble and low-frequency presence are effortless while midrange is reproduced with lifelike composure-none sacrificing their organic roots to get there. Modern high-resolution sample rates benefit especially well from the HD 650's willingness to reveal subtle nuances without resorting to over-hyping the treble range. Each transducer manufactured is measured against rigid specifications and paired with a perfect match for consistent representation of the entire frequency spectrum in both channels. By reducing variances between left and right channels, the headphone reproduces mastering-grade sound independent of room acoustics or loudspeaker positioning.

 

Made For More

Everything about the HD 650 was made with more in mind: more details discovered, more musicality, and definitely more time for blissful listening. Made in Ireland at a state-of-the-art production facility, the HD 650 combines the best of modern transducer manufacturing with the attention to detail required to handle a wide variety of acoustic materials. Our production tolerances are extremely tight, ensuring that your HD 650 experience is consistent with those all over the globe, whenever or wherever it was purchased. For example, the resonators feature stainless steel mesh to guarantee uniform performance after manufacturing. Even better, most parts on the HD 650 are modular, making them a dream to keep as your go-to hi-fi playback headphones for as long as you cherish them. From the velour pads to the earcup grille pattern, each component was crafted to guarantee a next-level personal sound experience so you can enjoy your music even more.

 

It's All About Connection

Your HD 650 comes with a detachable, impedance-matched cable with ultra-low capacitance. The ¼-inch / 6.3mm stereo connector offers the audiophile-standard plug for connection to devices such as headphone amplifiers and A/V receivers, digital audio players, analog gear, and more. At 9.8 feet / 3m long, it offers unencumbered listening on gear deep within your shelves or in a favorite listening chair. A premium adapter is included to reduce the 6.3mm to 3.5mm / ?-inch for plugging into countless other audio devices.

Specifications

Wearing style

Headband

Color

titan

Frequency response (Headphones)

10 - 41000 Hz

Sound pressure level (SPL)

103 dB

THD, total harmonic distortion

< 0,05 %

Contact pressure

6.0 N ± 1 N

Connector

1/4* (6,35 mm) stereo jack plug

Adapter

1/4* (6,35 mm) stereo jack plug to 3,5 mm stereo jack plug

Cable length

3 m

Transducer principle

dynamic, open

Nominal impedance

300 O

Weight w/o cable

260 g

Date Created: 18:29, 23-06-2026
Product URL: https://www.pbtech.com/product/HSTSEN508825/Sennheiser-HD-650-Open-Back-Wired-Audiophile-Refer