Sennheiser HD 650 Open-back Audiophile and Reference Headphones

Open Audiophile-quality Hi-Fi Professional Headphones
Sennheiser HD 650 Open-back Audiophile and Reference Headphones image 1
Sennheiser HD 650 Open-back Audiophile and Reference Headphones image 1

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Sennheiser HD 650 Open-back Audiophile and Reference Headphones
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Headphones For Golden Ears

With the Sennheiser HD 650s, audiophiles will experience truly unique natural sound. With sound this good, long concerts in the comfort of your home are a certainty, so the HD 650 also sets standards in comfort and convenience. The HD 650s are a genuine masterpiece that will satisfy even the most demanding listener. HD 650 - the reference class.

Sennheiser HD 650 Features:
  • Top-of-the-range, open, dynamic hi-fi stereo headphones
  • Systems with narrow tolerances (+/-1 dB), hand-picked in pairs
  • High-quality titanium/silver finish
  • Specially developed acoustic silk for precise, uniform attenuation over the entire area
  • Detachable, specially modulated connecting cable made from highly conductive oxygen-free copper that is Kevlar-reinforced and boasts very low handling noise
  • Extremely lightweight aluminium voice coils ensure excellent transient response
  • Exceptionally comfortable to wear due to elliptical design adapted to the shape of the ears
  • Can be directly connected to stationary hi-fi components of the highest quality such as SACD, DVD-A, and CD players

Additional Media

HD 650 Spec Sheet
HD 650 User Manual
Headphones Buying Guide
Live Sound Monitor Buying Guide
Studio Monitor Buying Guide

Tech Specs

Open/Closed Open
Fit Style Circumaural (Around the Ear)
Frequency Response 10Hz-39.5kHz
Impedance 300 ohms
Cable Type Straight
Replaceable Cable Yes
Cable Length 9.8'
Plug Size 1/4" (1/8" Adapter Included)
Weight .57 lbs.
Manufacturer Part Number 009969

Customer Reviews

Based on 26 reviews
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Must have for the Audiophile

Great pair of headphones that really bring music to life. The surround-sound effect these give you is unbelievable and make them the perfect pair to watch a movie on. I recommend them to anyone who really wants to be absolutely lost into their audio. The bass isn't crazy like the standard consumer sound, and much more reserved. The bass notes come through with detail I've never heard before. If you're looking for something to mix and master on, I recommend getting the HD 600's, as they're flatter sounding and have a solid center. The HD 650's lack a strong center which was hard to mix on. The sound of these is colored, and may be too warm for some, so the 600's can be seen as the tame, less adulterated version. HD700 is just over the top, don't even think about it.
Music background: Engineer

Great reference

Let me start by saying 2 good reasons I will always buy from sweetwater (Dennis k.) great informed advice and the best tech support ever. The headphones lived up to the claims. An accurate reference for analyzing your mixes. Also great to listen to music on. Not all hyped up. They are a great tool for eq, stereo spread and balance. Thanx again for the advice
Music background: Technician with national touring acts


How good can these headphones be? The price says they gotta be good, but really, that good? The HD 650 is Sennheiser's current top-of-the-line, serious, audiophile, reference headphone, and I've had them long enough now to listen to all types of music (through a special headphone amp) and they just keep sounding better and better. I don't get it. Well, I do . . . The HD 650's are very nicely-built, light, yet substantial-feeling. Very comfortable soft velour pads. Quality, make no mistake. The cable is fairly heavy-duty (but not a sausage), unlike most phones' cables where they are skinny and frail. These have a gold-plated, one-quarter-inch pro phono plug and come with a likewise gold plated mini-plug adapter. The box these headphones come in has metal hinges, if that tells you anything. If one were to describe the airiness, the spacial, tonal width, the landscape, the effortlessly tight response, the naturally keen detail, the lack of point source and the total, overall sonic VIEW these phones lay down, it would be very difficult to say enough about them. I mean, when you hear music (or anything) through these phones it's like nothing you've ever experienced. Speakers can't even come close. I have owned a bunch of headphones in my time, and always better, more expensive ones. These are the top of the mountain. From hear you can see it all. Sorry if you were waiting for something negative about these headphones. I can't find anything like that to say. Get these phones to experience the best. I don't say that because I bought a set. I say I bought a set because it is true.
Music background: Pro Stuff

These are it

We went on a trip this summer and I let my wife use my Beyer Dynamic DT770's, and she said she wanted them. They are great cans, but this was the opportunity that I need to upgrade to the Sennheiser 650's. Within a week of returning from our trip they were at my door. Thanks Sweetwater. I use them primarily for listening. Shortly they will be plugged into my Bottlehead Crack Tube Headphone amp. As they are the sound is just awesome. Very clean highs, and a nice but not overpowering bass. One of the most important things besides sound quality for me is the comfort. These are right up there with the Beyer 770's for comfort, but are definitely a step above the Beyer's for sound quality. I can listen to these for hours with zero fatigue.
Music background: Musician, Audiophile, and DIY

The truth

When I auditioned these headphones listening to mixes that I've done in the past, they brought a smile of astonishment to my face. They translated exactly how my mixes sounded in the studio! No bass, treble, or mid range hype, just the truth! You can't ask for anything more in a headphone and in fact, I heard slight panning details that I've never heard before when I checked my mixes on other cans. Buy these headphones, you won't be disappointed...
Music background: Producer/Engineer/Programmer

Sweetwater Advice

Mike Conyers

For an exceptional pair of open-back reference headphones, the Sennheiser HD 650s are the only pair I'll ever need. Mixes sound beautiful and alive, individual instrumentation comes through with more clarity... you'll wonder if you ever listened to anything accurately with headphones before!
See also: Head Phones, Sennheiser, Sennheiser Headphones, Sennheiser Headphones