Sennheiser HD 400 PRO700047 · HD 400 PRO · wired- Nominal impedance
- 120 ohmThis one: 130 ohm
- Weight
- 240 gThis one: 260 g
HEADPHONES
Sennheiser HD 490 PRO
HD 490 PRO (standard, not PRO Plus) · wired · Sennheiser part 700286
- Acoustic design
- Open-back
- Wearing style
- Over-ear (circumaural), open-back wired studio headphones
- Nominal impedance
- 130 ohm
The HD 490 PRO (article 700286) is Sennheiser's open-back, around-ear wired studio reference headphone. It has a 38 mm dynamic transducer, a rated 130 Ω impedance, two interchangeable ear-pad sets for mixing and producing, a detachable cable that can plug into either ear cup, and braille-guided L/R ear cups with grooved pads for eyeglass wearers.
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THE ACTUAL PRODUCT
Compare with Sennheiser HD 400 PRO
Specifications checked 26 Sept 2026Manufacturer specifications, not a hands-on test.
The nearest checked headphones by key specifications, with what differs from the Sennheiser HD 490 PRO. The first matches the Compare button above.
Sennheiser HD 400 PRO700047 · HD 400 PRO · wired
Beyerdynamic DT 990 PRO 250 ohm459038 · 250 ohm · coiled cable- Nominal impedance
- 250 ohmThis one: 130 ohm
- Weight
- 250 gThis one: 260 g
Beyerdynamic DT 900 PRO X729906 · 48 ohm · black- Nominal impedance
- 48 ohmThis one: 130 ohm
- Weight
- 345 gThis one: 260 g
Key strengths
Two washable, replaceable ear-pad sets come in the box, one for mixing and one for producing, so the listener can switch pad type without buying accessories.
Sensitivity is stated both per volt (105 dB SPL) and per milliwatt (96 dB SPL) at 130 Ω, which helps when matching it to an interface or headphone amplifier.
Before you buy
It uses an open acoustic principle; Sennheiser presents the open-back design as providing natural ventilation and publishes no ambient-noise attenuation figure.
The standard 700286 box has one 1.8 m cable and no case. The 3 m cable, extra headband pad and case come with the separate PRO Plus article.
Every specification. With its source.
Full specifications
Exact configuration: 700286 · HD 490 PRO (standard, not PRO Plus) · wired
20 specifications in 6 groups. Values are manufacturer specifications unless a row says “Measured result” or “Calculated from cited specifications”.
Design & fit
4 items
Connections & battery
4 items
- Wired / wireless connections
- Wired; detachable 1.8 m cable with 3.5 mm plug and supplied 6.3 mm adapter; right and left ear-cup jacks
Replacement 1.8 m, 3 m, balanced and coiled cables are sold separately as accessories.
- Cable arrangement
- Detachable 1.8 m cable; right and left ear-cup jacks, so the cable can be connected on either side
Sennheiser: 'Right and left ear jacks with detachable cable easily adapts to any studio configuration'. Only one 1.8 m cable is in the standard 700286 box.
Source - Battery life
- Not listed by the manufacturer
The reviewed exact sources do not explicitly establish battery life or that no battery is required for operation. A wired/dynamic audio path, omitted charger or Battery included N is not an explicit operating-power requirement.
- Cable length
- 1.8 mSource
Audio specifications
8 items
- Nominal impedance
- 130 ohm
- Rated sensitivity
- 105 dB SPL (1 kHz, 1 Vrms); 96 dB SPL (1 kHz, 1 mW)
Two references are given: per volt and per milliwatt.
Source - Driver construction
- 38 mm dynamic transducerSource
- Driver diameter
- 38 mmSource
- Rated frequency range
- 5–36,100 Hz (−10 dB)
The specification sheet states 36,100 Hz; the product page rounds the upper limit to 36,000 Hz.
- Rated total harmonic distortion
- <0.2% at 1 kHz, 100 dB SPLSource
- Maximum sound pressure level
- 128 dB SPL (1 kHz, 5% THD)Source
- Rated power
- 300 mW (100 h, noise IEC 60268)
The datasheet labels this 'Power rating'; the product page lists the same figure as 'Power consumption (Amp)'.
Calls & noise control
2 items
- Active noise cancellation
- Not listed by the manufacturer
The reviewed exact sources do not explicitly establish active noise cancellation absence. Preserve separately sourced acoustic design and passive attenuation; they cannot turn omitted ANC into a false capability.
Source - Microphone
- Not listed by the manufacturer
The reviewed exact sources do not explicitly establish microphone absence. Omission from a package or technical inventory, a stereo audio connector, and a without-remote statement do not establish microphone=false.
Software & controls
1 item
- Accessibility features
- Braille-guided L/R ear cups; grooved ear pads for eyeglasses
Sennheiser describes these as patented accessibility features.
Source
In the box
1 item
- In the box
- HD 490 PRO headphones, 3.5 mm to 6.3 mm adapter, 1.8 m cable, mixing ear pads, producing ear pads, quick guide, safety guide
The HD 490 PRO Plus (700287) adds a 3 m cable, an extra headband pad and a case; it is a separate article.
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