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Sennheiser

Sennheiser HD 550

Name: Sennheiser HD 550
Brand: Sennheiser
SKU: B0DSGHN67Q
Price: 349.00 USD

Current price · Amazon US

$349

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Price last checked 1d ago

Noise Isolation / ANC & sound

2.5/ 10

2.5

0.010.0

A 2.5 puts its noise isolation / ANC in the bottom 10% of over-ear headphones we've measured.

Measured on 86 of the 240 we've cataloged.

4.5/ 5

SoundMDAQS Overall

4.5

1.05.0

A 4.5 puts its audio quality in the top quarter of over-ear headphones we've measured.

Measured on 44 of the 240 we've cataloged.

Key specs

Connection Type

Wired 3.5mmMost common

Wired-3.5mm48%Bluetooth44%Wired-usb-c7%Others1%

Wired-3.5mm is the most common — on 48% of the 215 over-ear headphones we've cataloged (of 240).

Weight

237 gBelow average

237 g

132 g420 g

below average for over-ear headphones — based on 195 of 240 we've cataloged.

Connectivity

Connection Type: Wired 3.5mm
USB Charging: No

Design

Weight: 237 g
Color Options: Black, grey
Ear Pad Inner Dimensions: 43×75 mm
Ear Pad Type: Velour
Foldable: No
Headband Type: Adjustable over-head

Build

Material Chassis Primary: Plastic
Material Ear Cups: Velour
Material Headband: Plastic with padding

Sound

Acoustic Design: Open-back
Driver Size: 38 mm
Driver Type: Dynamic driver
Frequency Response: 6-39500 Hz
Frequency Response High Hz: 39500 Hz
Frequency Response Low Hz: 6 Hz
Impedance: 150 Ω
Sensitivity: 106.7 dB/mW

Battery

Battery: No

Microphone

Microphone: No

SoundGuys review

Read the full review ›

SOUNDGUYS rating

7.1/ 10

Recommended

Reviewed byChristian ThomasEditor-at-largeReviewed March 2025

Isolation2.5

Comfort & fit9.0

Connectivity6.5

Design9.0

Portability5.0

Features6.0

The verdict

This is an excellent set of open-back headphones for the computer warrior or music enthusiast. Though the sound isn't as "exciting" as some may want, it's a great platform to ease newer audiophiles into equalizing, or simply enjoying comfortable headphones.

✓What we like

✓Sound quality

✓Comfort

✓Price

✓Low power requirement

✓Replaceable cable

✕What could be better

✕Locking cable

Read the full SoundGuys review →

Lab data

How we test ›

Objective measurements from the SoundGuys test lab — overlay other models to see how this one compares.

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0 of 4 overlay slots used

Sennheiser HD 550SoundGuys Headphone Preference Curve

Measured frequency response (dB) against the SoundGuys house target — the dashed curve. The closer the measured line tracks the target, the more neutral the tuning; peaks ride above the target, dips fall below it.

Frequency response — measurement data

Sennheiser HD 550: frequency response, as measured in the SoundGuys lab. Frequency in hertz.
Frequency (Hz)	Response (dB)
20	-5.1
25	-3.7
32	-2.4
40	-1.5
50	-1.5
63	-1.0
80	-1.3
100	-0.8
125	-0.9
160	-1.1
200	-1.4
250	-1.6
315	-1.6
400	-1.7
500	-1.7
630	-1.2
800	-0.8
1000	-0.0
1250	0.9
1600	1.8
2000	3.0
2500	6.5
3150	7.3
4000	6.5
5000	7.9
6300	5.5
8000	2.0
10000	6.9
12500	-3.3
16000	-4.1
20000	-17.7

Sennheiser HD 550

Passive isolation (dB) with ANC off — how much ambient noise the fit blocks on its own. Higher on the chart means more attenuation.

Passive isolation — measurement data

Sennheiser HD 550: passive isolation, as measured in the SoundGuys lab. Frequency in hertz.
Frequency (Hz)	Attenuation (dB)
21	1.6
26	-4.8
33	0.1
41	-0.1
52	0.3
65	0.3
82	-0.1
103	-0.0
130	0.1
163	0.1
205	0.0
259	0.2
325	-0.3
410	-0.1
516	-0.2
613	-0.2
772	-0.3
972	-1.3
1220	-2.4
1540	-2.2
1940	-1.3
2440	2.7
3070	4.4
3870	18.2
4870	22.1
6130	17.0
7720	15.0
9720	19.7
12200	7.9
15400	12.2
19400	5.3