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Sennheiser HD 650 Open-Air Pro Headphones

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242416 000000000
Product Price $367.99
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The audiophile Sennheiser HD 650 is the ultimate in open, dynamic headphone design. Developed from the award-winning HD 600, HD 650 headphones featur...Click To Read More About This Product

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Simply the finest 'phones you'll find.

The audiophile Sennheiser HD 650 is the ultimate in open, dynamic headphone design. Developed from the award-winning HD 600, HD 650 headphones feature improved materials for even better sound reproduction. These headphones will captivate you with their expressiveness and emotion while maintaining absolute precision and lifelike reproduction.

  • Selected, matched headphone systems with very tight tolerances (+/- 1dB)
  • Optimized magnet systems for minimizing harmonic and intermodulation distortion
  • Titanium finish
  • Quality metal mesh covers for superb open and transparent sound
  • Reinforced, insensitive to handling noise
  • Plated 1/4" jack plug with adapter lead to 3.5 mm jack plug
  • 1-year warranty

If you have critical listening requirements, the HD 650 headphones are what you need. Order today!

  • Nominal impedance 300 Ohm
  • Contact pressure ca. 2,5 N
  • Weight w/o cable ca. 260g
  • Jack plug 6,3/3,5 mm stereo
  • Transducer principle (Headphones) open, dynamic
  • Ear coupling circumaural
  • Cable length 3 m
  • Frequency response (headphones) 10.....39500 Hz
  • Sound pressure level (SPL) 103 dB (1 Vrms)
  • THD, total harmonic distortion 0,05 %
  • Glossary
  • Nominal impedance
  • See impedance.
  • Contact pressure
  • The wearing comfort of a set of headphones is determined not only by its weight but also by the force with which the earpieces are pressed onto the ears. This force is given in newtons (N), whereby 1 N corresponds to the compressive force which a mass of about 100 g exerts on a solid surface. The DIN Standard 45500 Part 10 limits the maximum permissible contact force to 5 N. Values of between 1.3 and 4 N are common, although lower values apply for open headphones. Higher values can be found in the case of closed headphones. Here, a higher contact pressure is required in order to achieve sufficient sealing, which is important for the reproduction of low frequencies.
  • Weight w/o cable
  • Jack plug
  • A common audio connector in consumer electronics and music industry. Available in various diameters; in the hi-fi segment, 1/8" and 1/4" are widely used. Poles range from one to four. (Examples: headphone jack or jack of an electric guitar).
  • Transducer principle (Headphones)
  • Ear coupling
  • A distinction is made between headphones which are worn on the external ear (supra-aural) and those which surround the ear (circumaural). Open headphones have foam ear pads that rest on the ears or ring pads that surround the ears. Closed headphones, on the other hand, nearly always have circumaural ear pads.
  • Cable length
  • The cable length is usually measured between the anti-kink sleeves of the cable (cable length without connectors).
  • Frequency response (headphones)
  • The frequency response of a pair of headphones is given within limits defined by the manufacturer.
  • Sound pressure level (SPL)
  • Due to the impractical numerical values, the sound pressure is usually given as the logarithmic value of the sound pressure level according to the equation: dB SPL = 20 x log (po / 0.00002 Pa). The abbreviation SPL (sound pressure level) is added in order to make a clear distinction from other uses of dB. The reference sound pressure, which is at the same time the threshold of hearing, is then 0 dB SPL. The threshold of pain is 140 dB SPL. A difference in the sound pressure level of 1 dB is just about perceptible, while a doubling of the sound pressure corresponds to 6 dB and a doubling of the volume corresponds to a rise of 10 dB.
  • THD, total harmonic distortion
  • Total harmonic distortion is a measure of non-linear harmonic distortion and is given in %. Non-linear harmonic distortions are signals which were not present in the original before the signal was converted by the headphones. These unwanted signals are caused by the diaphragm, whose movements do not precisely move in time with the electric signals that cause it to move. Unfortunately, this is a feature of all electroacoustic transducers. Although it cannot be completely eliminated, suitable steps can be taken to minimise it. However, the user is not interested in why this distortion takes place but in how great the level of distortion must be for it to become perceptible. According to the findings of several research projects, a total harmonic distortion of 1% in the frequency range of 100 to 2000 Hz is imperceptible. Below 100 Hz, the perceptibility threshold lies at 10%

Review Snapshot

by PowerReviews
SennheiserHD 650 Open-Air Pro Headphones

(based on 8 reviews)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars



Reviewed by 8 customers

Displaying reviews 1-8

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(5 of 6 customers found this review helpful)


Get serious, hear?

By Bosso Basso

from Left 1056 near 1057

See all my reviews

Comments about Sennheiser HD 650 Open-Air Pro Headphones:

I have been using the venerable Sennheiser HD 580 Precision headphones for many years now in recording and studio applications where open-air phones can thus be used. As a recording engineer of some merit, I can easily afford most any set of headphones, (I refuse to call them 'cans') so it becomes a matter of sound quality and comfort, in that order, which dictates the ones I choose. I meant to get the 650s when they first came to my attention, but I procrastinated, as some of us do.I did finally get a set of the HD 650s, which naturally should sound better than the 580s. Did I say sound better? Not to disparage the 580s, which are very good headphones, but this is a good example wherein you most definitely get what you pay for. I have never heard anything so exquisite coming from a set of production, professional quality, reference headphones! And I have tried them all. That's right. All. From the total lack of unnecessary features, protuberances, gewgaws, thick, heavy, clumsy cables and more: from the sheer engineering prowess displayed in the utterly clean sound and the immediate lack of mundane style, these headphones demonstrate the nexus of all that is significant in why do anyone in the recording industry use them at all: they sound absolutely fabulous, are the most comfortable out there and are a bargain for the price. I needn't go into all the "Wine Spectator"-like reviews and embellish upon the "sound" these headphones make. All I can really say here is how completely impressed I am with every aspect of these headphones. There are none I would rather wear all day long.

(5 of 8 customers found this review helpful)


If you are considering the HD650...

By jamescam

from Philly

Comments about Sennheiser HD 650 Open-Air Pro Headphones:

Take it from me. Buy the HD600 instead. If you value realism and accuracy like I do, there is no doubt that you will find the HD600 more to your liking. I own both the HD650 and HD600 (retailer won't let me return the HD650). The HD650 is a good headphone, but the exaggerated lows are unacceptable for such an expensive headphone. The HD600 is cheaper, and in this case, absolutely superior - could not be more pleased.

(4 of 4 customers found this review helpful)


Not for studios!

By NightWoundsTime

from FL

Comments about Sennheiser HD 650 Open-Air Pro Headphones:

This phone is the absolute best value in audiophile headphones. Beware, though, that it WILL NOT sound good with standard headphone jacks found in and around most studios or professional sound applicatons. Why? Because these are extremely high impedance headphones and require a headphone amplifier to truly shine.

(3 of 3 customers found this review helpful)


These things shine with a headphone amp!

By Dave-JtFYT

from The top of the hill

See all my reviews

Comments about Sennheiser HD 650 Open-Air Pro Headphones:

The HD-650 headphones are remarkable! Their superb clarity, imaging, and comfort make them ideal for...just about anything (except travel)! I HIGHLY recommend using these through a good headphone amp. They take a little more juice than most headphones.

(2 of 2 customers found this review helpful)


Sennheiser HD-650

By Paperweight

from Lexington, NC

About Me Audiophile, Gear Head

See all my reviews

Verified Buyer


  • Comfortable
  • Durable
  • Good Bass
  • Great Sound
  • Lightweight
  • Modular Replacement Parts


  • Poor Value
  • Price Point

Best Uses

  • Home Audio
  • Music
  • Relaxing
  • With My Computer
  • Working

Comments about Sennheiser HD 650 Open-Air Pro Headphones:

I've owned the HD-600s for 5 years and love them. The HD-650 are a bit different but still good in their own way. They have a 5 decibel bass boost over the 600s that give them that extra bit of oomph on electronic music. Paired with a good headphone amp like the O2 or AMB Labs M3, they really shine. They may not be as accurate as the 600s but they are very musical.

The 600s and 650s both have that laid back sound with the extreme highs sounding rolled off. It may not be everyone's cup of tea but taking out that sizzle at the top makes for a non-fatiguing listening experience. I've never liked highs that are like an icepick to your eardrums so Sennheisers suit me fine. Grado headphones would be on the opposite end of the spectrum with a bright, forward sound.

One of the best features, outside of sound quality, is the modular design of the HD-580, 600 and 650s. Every part can be gently pried apart and replaced. The headband padding, ear cups and cable are easily replaced with a bit of patience. Sennheiser even sells replacement drivers if you happen to somehow destroy them.

One of the cons would be their price point. They're great for what they are but the HD-600s are the better bargin in mid-priced refrence headphones.

  • Primary Use:
  • Listening to iPod
  • Was this a gift?:
  • No

(2 of 14 customers found this review helpful)



By bojo

from Seattle, WA

Comments about Sennheiser HD 650 Open-Air Pro Headphones:

I can't believe I payed so much for these. They aren't nearly warm enough for professional studio use, and are severely lacking in pop and verve.

(2 of 3 customers found this review helpful)


Incredibly detailed headphones!

By CWoolery

from Chicago

Comments about Sennheiser HD 650 Open-Air Pro Headphones:

I had the pleasure of auditioning a pair of these against my Beyerdynamic DT-770's and my AKG K240's. The Dt-770's took the crown in the bass department because of their sealed nature, but the Sennheiser 650's were a tad more clear with imaging. My main use for headphones is for studio mixing, so a bright sounding muddy pair of cans is the last thing I want. I would trust the 650's on a mix any day of the week, and if I ever break my Beyerdynamics I'm definitely buying a pair of these!!

(1 of 2 customers found this review helpful)


best headphones

By Newb audiophile

from Montreal Canada

Comments about Sennheiser HD 650 Open-Air Pro Headphones:

I used them everyday since 6 month from now and they are just superb. The only bad thing about them is the cable that somehow always gets stuck on something ha ha ha so strange. As a beginner audiophile they are solid entrance to the audio world.

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