Detail 01
300 ohm impedance
Needs a dedicated headphone amp or a strong interface output. Most phone and laptop jacks leave it quiet and thin.
Product detailSKU #1274034493179
SennheiserHD 650 Open-Air Pro Headphones
Sale
1/5
Independent shopping perspective
The Korena take
Open-back reference headphone at 300 ohm. For mixing, critical listening and studio use where a real headphone amp is available.
Strong match
Who this is for
- Mixing and mastering in a quiet room with an amp
- Long sessions where clamp and heat matter
- Checking depth and stereo placement in a mix
Consider the trade-offs
When to look elsewhere
- Tracking vocals — open backs leak into the mic
- Phones and laptops, which can't drive 300 ohm
- Commuting, offices, anywhere with background noise
What matters in use
The specifications, translated
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 02
Open-back transducer
Sound passes both directions. Wider, less boxed-in stereo image, but everyone near you hears it and you hear them.
Detail 03
Circumaural earcups
Pads surround the ear rather than press on it, so pressure spreads over the skull instead of the cartilage.
Detail 04
260 g without cable
Light for a full-size headphone. Most of the weight sits on the headband rather than clamped to your jaw.
Detail 05
2.5 N contact pressure
Gentle clamp. Comfortable for hours, but they shift if you move your head quickly.
Detail 06
3 m cable
Reaches from a desk to a couch or across a control room without an extension. Long enough to tangle underfoot.
Final check
Know before you order
- 01Budget for a headphone amp if your interface output is weak
- 02Cable terminates 6.3 mm with a 3.5 mm adapter — check your jack
- 03New pads sound tighter; they loosen over the first weeks
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Can I use these with my phone?
Not well. At 300 ohm a phone output runs out of level before it gets loud, and the low end thins out. Use an interface or headphone amp.
02Are these good for recording vocals?
No. The open back lets sound escape into the microphone. Use a closed-back headphone for tracking and save these for mixing and playback.
03Do they block outside noise?
No. Open-back design is acoustically transparent in both directions. You hear the room, and the room hears you.
04What's the cable connection?
A 3 m cable ending in a 6.3 mm stereo plug, with 3.5 mm also covered, so it fits both interface and consumer outputs.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
2 detailsSound
- Frequency Response Headphones
- 10Hz–39.5kHz
- Nominal Impedance
- 300 ohm
1 detailsPickups & controls
- A Common Audio Connector in Consumer Electronics and Music Industry Available in Various Diameters in The Hi Fi Segment 1 8 Quot and 1 4 Quot Are Widely Used Poles Range From One to Four Examples
- headphone jack or jack of an electric guitar).
1 detailsBody & build
- Color
- Gray
1 detailsConnections & power
- Jack Plug
- 6.3/3.5 mm stereo
2 detailsSize & weight
- Weight Without Cable
- ca. 260 g
- Cable Length
- 3 m
6 detailsOther
- 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.
- Ear Coupling
- Circumaural
- Sound Pressure Level
- (SPL) 103dB (1 Vrms)
- Contact Pressure
- ca. 2.5 N
- Thd Total Harmonic Distortion
- 0.05%
- Transducer Principle
- Open, dynamic
