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THE ACTUAL PRODUCT
Sennheiser HD 650 headphones with the HD 650 badge, titanium-silver frame, black open grilles and detachable cable visible
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HEADPHONES · LOOK CLOSER

Sennheiser HD 650

300 Ω · titanium-silver finish · standard 6.35 mm cable

Open-back wired headphones with a 300-ohm nominal load, a detachable three-metre cable and replaceable ear pads.

Reviewed 6 Sept 2026Manufacturer specifications, not a hands-on test.
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WHAT IT BRINGS

The useful part.

The standard cable connects to 6.35 mm or, with the supplied adapter, 3.5 mm headphone outputs. Both the cable and ear pads can be replaced.

Manufacturer source
BEFORE YOU CHOOSE

The checks that matter.

The open-back design is intended for home listening. Check your source's headphone output; there is no built-in microphone, wireless connection or active noise cancellation.

Manufacturer source
NOTHING HIDDEN IN THE SMALL PRINT

Every specification.
With its source.

Our publishing standard
Wearing style
Over-ear (circumaural), open-back dynamic headphones
Conditions & context

Manufacturer specification

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Wired / wireless connections
Wired analogue stereo; detachable 3 m cable with 6.35 mm plug and included 3.5 mm adapter
Conditions & context

Manufacturer specification

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Microphone
No
Conditions & context

Manufacturer specification · The manual's standard connection diagram and package list specify stereo headphone cables, not a microphone or headset cable.

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Active noise cancellation
No
Conditions & context

Manufacturer specification · Passive open-back operation in the manual; acoustic mesh is not active noise cancellation.

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Weight
260 g
Conditions & context

Manufacturer specification · Approximately, without the cable; manufacturer specification, not our measurement.

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Battery life and conditions, or not applicable
Not required: passive wired headphones powered by the source's audio output
Conditions & context

Manufacturer specification · Manual connection and operation sections describe analogue stereo input, not battery-powered operation.

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Acoustic design
Open-back
Conditions & context

Manufacturer specification

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Nominal impedance
300 ohm
Conditions & context

Manufacturer specification · Nominal load; this is not a sound-quality score.

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Included cable length
3 m
Conditions & context

Manufacturer specification · Included unbalanced cable; optional balanced cables are not part of this configuration.

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Rated frequency range
10–41,000 Hz (−10 dB)
Conditions & context

Manufacturer specification · Manufacturer's stated range and threshold, not a measured response graph.

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Rated sensitivity
103 dB SPL at 1 kHz, 1 V rms
Conditions & context

Manufacturer specification · Voltage-referenced sensitivity; do not compare directly with dB/mW specifications.

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Rated input limit
Maximum 500 mW long-term input, EN 60-268-7
Conditions & context

Manufacturer specification · Rated input limit, not output volume or measured consumption.

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Replaceable parts
Detachable connection cable and replaceable ear pads
Conditions & context

Manufacturer specification · The manual describes both procedures; headband padding replacement is a repair-service task.

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PUT IT IN PERSPECTIVE

A choice needs a contender.

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