Beyerdynamic T51i Review | 93 Data compared

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  • Avg. price in UK: ~£220
  • Avg. price in US: ~$300
  • Form factor: on-ear
  • Connectivity: wired
  • Battery life: N/A hours
  • Active noise cancellation (ANC): no

Beyerdynamic T51i review. Compare 93 technical specifications and user reviews to see how it ranks among headphones and if it is worth buying.

5.6

Overall score

What it is: An overall evaluation of the headphones' quality, based on technical analyses and user reviews.

When it matters: When you need a quick reference to identify the best headphones on the market.

Score components:

80.0%

5.6

Technical Score

20.0%

?

User score

Good
5.6

Technical Score

What it is: An assessment of the headphones' technical performance, covering key areas such as sound quality, noise cancelling, microphone performance, battery life, comfort, connectivity, features, and build quality.

When it matters: When you want to compare headphones based on technical performance and available features.

Score components:

52.0%

6.2

Sound

20.0%

4.1

Features

10.0%

6.6

Design

8.0%

6.2

Connectivity

6.0%

1.0

Battery

4.0%

8.6

Calls & Controls

Good
?

User score

What it is: A rating that combines user reviews and the total number of reviews received by the headphones.

When it matters: When you want to understand how headphones perform in real listening and how reliable they are in terms of comfort, audio quality, battery life, and long-term use.

Score components:

70.0%

?

User reviews

30.0%

?

Popularity

  • 3.2
    Gaming

    Score components:

    35.0%

    0.0

    Audio latency

    25.0%

    0.0

    Low-latency game mode

    20.0%

    10

    Can be used as a headset

    12.0%

    10

    Noise-canceling microphone

    8.0%

    0.0

    Battery life

  • 1.4
    Travel

    Score components:

    28.0%

    1.0

    Active noise cancellation (ANC)

    24.0%

    0.0

    Battery life

    18.0%

    6.3

    Weight

    16.0%

    0.0

    Multipoint support

    14.0%

    0.0

    Ambient sound mode

  • 5.2
    Calls

    Score components:

    28.0%

    10

    Noise-canceling microphone

    24.0%

    10

    Can be used as a headset

    18.0%

    0.0

    Multipoint support

    16.0%

    0.0

    Battery life

    14.0%

    0.0

    Companion app

  • 4.0
    Workout

    Score components:

    28.0%

    6.3

    Weight

    24.0%

    1.0

    Water resistance

    20.0%

    4.0

    IP rating

    16.0%

    0.0

    Battery life

    12.0%

    10

    Can be used as a headset

  • beyerdynamic-t51i
beyerdynamic-t51i

Best prices in UK

    N/A~ £220

Best rankings

?

Available: ranking among products currently available (including other versions of this product).
All: ranking among all products in the database.

Verdict

The Beyerdynamic T51i are closed-back, on-ear portable headphones featuring proprietary Tesla technology with a 10Hz–23kHz frequency response and 32-ohm impedance, delivering a well-balanced sound with punchy bass, natural mids, and detailed highs. Notable characteristics include a durable all-metal construction weighing just 174g, memory foam earpads for comfort, and a 3-button in-line remote optimized for Apple iOS devices. Their main pros are exceptional sound precision, excellent passive noise isolation, and a sturdy, lightweight design ideal for commuting. Cons include a fixed (non-detachable) cable that can be prone to tangling and an on-ear clamp that may cause fatigue over extended listening sessions.

Technical Specifications of Beyerdynamic T51i

Technical Score

What it is: An assessment of the headphones' technical performance, covering key areas such as sound quality, noise cancelling, microphone performance, battery life, comfort, connectivity, features, and build quality.

When it matters: When you want to compare headphones based on technical performance and available features.

Score components:

52.0%

?

Sound

20.0%

?

Features

10.0%

?

Design

8.0%

?

Connectivity

6.0%

?

Battery

4.0%

?

Calls & Controls

5.6
Beyerdynamic T51i has a technical score of 5.6 points, which is higher than that of 68% of products in this category.
User score

What it is: A rating that combines user reviews and the total number of reviews received by the headphones.

When it matters: When you want to understand how headphones perform in real listening and how reliable they are in terms of comfort, audio quality, battery life, and long-term use.

Score components:

70.0%

0.0

User reviews

30.0%

1.0

Popularity

?
Popularity
What it is: An indicator based on the number of reviews received by the headphones.
When it matters: When you prefer headphones that have already been chosen and reviewed by many other users.
1.0
Beyerdynamic T51i has a popularity of 1 points, which is lower than 72.7% of products in this category.
Ratio quality/price

What it is: An indicator that combines the headphones' overall rating with their cost.

When it matters: When you are looking for headphones that offer a strong balance of performance, features, and price.

Score components:

60.0%

5.6

Overall score

40.0%

9.4

Price

6.7
Beyerdynamic T51i has a quality-to-price ratio of 6.7 points, which is higher than 45.2% of products in this category.
Active noise cancellation (ANC)
What it is: Reduces background noise using active technology
When it matters: When blocking office, travel, or aircraft noise is a priority.

Importance: HIGH

no
Beyerdynamic T51i does not support active noise cancellation. 27.4% of headphones support active noise cancellation.
Driver type
What it is: Type of speaker driver technology used
When it matters: When the underlying sound character and driver technology matter to you.

Importance: MEDIUM

dynamic
Driver size
What it is: Diameter of the speaker driver unit
When it matters: When you want extra hardware context behind how the headphones may handle bass weight, scale, or overall presentation.

Importance: MEDIUM

?
Number of drivers
What it is: Total number of speaker drivers per earcup
When it matters: When multi-driver designs are part of your buying criteria.

Importance: LOW

1
Beyerdynamic T51i uses 1 drivers, equal to 96% of headphones.
Lowest frequency
What it is: Lowest audio frequency the headphones can reproduce
When it matters: When deeper bass extension matters for your music or movie listening.

Importance: MEDIUM

Good value: <=10 Hz

10 Hz
Beyerdynamic T51i reaches a lowest frequency of 10 Hz, lower lowest frequency than 67.3% of headphones and equal to 12.5% of headphones.
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Noise-canceling microphone
What it is: Built-in microphone reduces background noise during calls
When it matters: When you take calls in busy spaces and want your voice to stay clearer.

Importance: MEDIUM

yes
Beyerdynamic T51i supports a noise-canceling microphone. 54.5% of headphones support noise-canceling microphones.
Can be used as a headset
What it is: Shows whether the headphones can handle voice chat and calls in addition to normal audio playback.
When it matters: When one pair needs to cover music, calls, meetings, and gaming chat.

Importance: MEDIUM

yes
Beyerdynamic T51i is headset-ready, 84.7% is not. 15.3% of headphones can be used as headsets.
Number of microphones
What it is: Total number of built-in microphones
When it matters: When call pickup quality and beamforming support matter to you.

Importance: LOW

Good value: >=2

1
Beyerdynamic T51i has 1 microphones, more microphones than 25.9% of headphones and equal to 52.2% of headphones.
Boom microphone
What it is: Includes detachable boom microphone for voice clarity
When it matters: When you need stronger voice clarity for gaming, streaming, or work calls.

Importance: LOW

no
Beyerdynamic T51i does not include a boom microphone. 15.6% of headphones have a boom microphone.
Microphone SNR
What it is: Signal-to-noise ratio of the microphone
When it matters: When call clarity matters and you want your voice picked up more cleanly instead of buried in background hiss.

Importance: LOW

Good value: >80 dB

?
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Connectivity
What it is: Available connection methods (wired, wireless, Bluetooth, etc.)
When it matters: When the headphones need to match how you listen across wired and wireless devices.

Importance: HIGH

wired
Beyerdynamic T51i supports wired connectivity, equal to 52.6% of headphones.
Bluetooth version
What it is: Version of Bluetooth technology supported
When it matters: When wireless stability, efficiency, and feature support matter more than treating Bluetooth as a box-check spec.

Importance: MEDIUM

Good value: >=5.0

N/A
Maximum Bluetooth range
What it is: Maximum wireless operating distance from source device
When it matters: When you move around rooms and want fewer dropouts from your source device.

Importance: LOW

Good value: >=10 m

N/A
Audio latency
What it is: Delay between audio and video in wireless mode
When it matters: When you watch video or play games and need sound to stay in sync.

Importance: HIGH

Good value: <60 ms

N/A
Multipoint support
What it is: Supports simultaneous connections to multiple devices
When it matters: When you switch often between a phone and a laptop during the day.

Importance: MEDIUM

N/A
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Ambient sound mode
What it is: Allows external sounds to pass through for awareness
When it matters: When you need to stay aware of traffic, voices, or announcements.

Importance: MEDIUM

N/A
EQ support
What it is: Allows customization of sound profile via equalizer
When it matters: When the stock tuning is not enough and you want to shape bass, mids, or treble to match your taste.

Importance: MEDIUM

no
Beyerdynamic T51i does not support EQ customization. 23.3% of headphones support EQ.
Companion app
What it is: Dedicated mobile app for customization and updates
When it matters: When software customization, updates, and extra controls matter.

Importance: MEDIUM

N/A
Adjustable ANC levels
What it is: Allows adjustment of noise cancellation intensity levels
When it matters: When you move between quiet rooms, offices, streets, and public transport and do not want one ANC setting for every situation.

Importance: LOW

Good value: >=4

N/A
Voice assistant support
What it is: Compatible with voice assistants like Siri, Alexa, or Google Assistant
When it matters: When hands-free control is part of your daily routine.

Importance: LOW

yes
Beyerdynamic T51i supports voice assistants. 39.2% of headphones support voice assistants.
Show more
Battery life
What it is: Playback time on a single charge
When it matters: When you commute, travel, or work long shifts and do not want charging breaks to interrupt listening.

Importance: HIGH

Good value: >45 hours

N/A
Battery life with ANC
What it is: Playback time with active noise cancellation enabled
When it matters: When you plan to keep noise cancellation on for most of the day.

Importance: HIGH

Good value: >40 hours

N/A
Charging time
What it is: Time required for a full battery charge
When it matters: When you often need the headphones ready again after short breaks.

Importance: MEDIUM

Good value: <=2 hours

N/A
Quick charge
What it is: Provides quick playback time with short charging period
When it matters: When a short top-up needs to deliver useful playback before you leave.

Importance: MEDIUM

N/A
Battery capacity
What it is: Total energy storage of the internal battery
When it matters: When you are estimating how much battery headroom the design may have before relying only on the official runtime claim.

Importance: MEDIUM

Good value: >=720 mAh

N/A
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Brand name
What it is: The manufacturer or brand of the product.
When it matters: When you prefer a specific ecosystem, support network, or design philosophy.

Importance: MEDIUM

Beyerdynamic
Form factor
What it is: Overall design type of the headphones (over-ear, on-ear, in-ear, etc.)
When it matters: When comfort, portability, and isolation depend on the overall headphone style.

Importance: HIGH

on-ear
Weight
What it is: Total weight of the headphones
When it matters: When long listening sessions make wearing comfort more important.

Importance: MEDIUM

Good value: <150 g

174 g
Beyerdynamic T51i weighs 174 g, lighter than 63.3% of headphones and equal to 0.2% of headphones.
Acoustic design
What it is: Type of acoustic design (open-back, closed-back, semi-open)
When it matters: When you need the right balance of isolation, leakage, and soundstage.

Importance: HIGH

closed-back
Clamp force
What it is: Amount of clamping pressure applied to the head
When it matters: When comfort and fit security matter during long sessions.

Importance: MEDIUM

2.5
Beyerdynamic T51i has a clamp force of 2.5, lower clamp force than 89% of headphones and equal to 3.9% of headphones.
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Beyerdynamic T51i vs the average headphone

  • Hi-Res Audio certification
    Beyerdynamic T51i has Hi-Res Audio certification, the average headphone does not. 22.9% of headphones are Hi-Res Audio certified.
    What it is: Certified for high-resolution audio playback
    When it matters: When official support for high-resolution playback matters to you.

    Importance: LOW

    Beyerdynamic T51i has Hi-Res Audio certification, the average headphone does not. 22.9% of headphones are Hi-Res Audio certified.
  • 9 dB/mW higher sensitivity
    Beyerdynamic T51i has a higher sensitivity than the average headphone (111 dB/mW vs 102 dB/mW). The average headphones have sensitivity of 102 dB/mW.
    What it is: Sound pressure output level per unit of input power
    When it matters: When you plan to use weaker sources like phones, handhelds, or entry-level dongles and still want enough volume.

    Importance: MEDIUM

    Good value: >=106 dB/mW

    Beyerdynamic T51i has a higher sensitivity than the average headphone (111 dB/mW vs 102 dB/mW). The average headphones have sensitivity of 102 dB/mW.111 dB/mW vs 102 dB/mW
  • Clear call microphone
    Beyerdynamic T51i offers a clear call microphone, while the average headphone does not. 45.6% of headphones support noise-canceling microphones.
    What it is: Built-in microphone reduces background noise during calls
    When it matters: When you take calls in busy spaces and want your voice to stay clearer.

    Importance: MEDIUM

    Beyerdynamic T51i offers a clear call microphone, while the average headphone does not. 45.6% of headphones support noise-canceling microphones.
  • Direct 3.5 mm plug
    Beyerdynamic T51i includes a direct 3.5 mm plug, the average headphone does not. 38.8% of headphones have a 3.5 mm male connector.
    What it is: Shows whether the headphones end in a built-in 3.5 mm male plug instead of relying on a separate detachable cable.
    When it matters: When direct wired compatibility with older devices or adapters matters.

    Importance: MEDIUM

    Beyerdynamic T51i includes a direct 3.5 mm plug, the average headphone does not. 38.8% of headphones have a 3.5 mm male connector.
  • 8 Hz lower bass extension
    Beyerdynamic T51i has a lower lowest frequency than the average headphone (10 Hz vs 18 Hz). The average headphones reach a lowest frequency of 18 Hz.
    What it is: Lowest audio frequency the headphones can reproduce
    When it matters: When deeper bass extension matters for your music or movie listening.

    Importance: MEDIUM

    Good value: <=10 Hz

    Beyerdynamic T51i has a lower lowest frequency than the average headphone (10 Hz vs 18 Hz). The average headphones reach a lowest frequency of 18 Hz.10 Hz vs 18 Hz
  • On-device controls
    Beyerdynamic T51i includes on-device controls, the average headphone does not. 46.8% of headphones support on-device controls.
    What it is: Physical controls available directly on headphones
    When it matters: When you need playback, volume, or call controls to be easy to reach without pulling out your phone.

    Importance: MEDIUM

    Beyerdynamic T51i includes on-device controls, the average headphone does not. 46.8% of headphones support on-device controls.
  • In-line controls
    Beyerdynamic T51i includes in-line controls, the average headphone does not. 36.4% of headphones support in-line controls.
    What it is: Controls available on in-line remote of wired cable
    When it matters: When your wired setup depends on cable-mounted buttons or call controls.

    Importance: LOW

    Beyerdynamic T51i includes in-line controls, the average headphone does not. 36.4% of headphones support in-line controls.
  • 1.8 lower clamp force
    Beyerdynamic T51i has a lower clamp force than the average headphone (2.5 vs 4.3). The average headphones have a clamp force of 4.3.
    What it is: Amount of clamping pressure applied to the head
    When it matters: When comfort and fit security matter during long sessions.

    Importance: MEDIUM

    Beyerdynamic T51i has a lower clamp force than the average headphone (2.5 vs 4.3). The average headphones have a clamp force of 4.3.2.5 vs 4.3
  • 1.8 lower clamp force
    Beyerdynamic T51i has a lower clamp force than the average headphone (2.5 vs 4.3). The average headphones have a clamp force of 4.3.
  • 20.2% lower weight
    Beyerdynamic T51i is lighter than the average headphone (174 g vs 218 g). The average pair of headphones weighs 218 g.
  • Hi-Res Audio certification
    Beyerdynamic T51i has Hi-Res Audio certification, the average headphone does not. 22.9% of headphones are Hi-Res Audio certified.
  • 9 dB/mW higher sensitivity
    Beyerdynamic T51i has a higher sensitivity than the average headphone (111 dB/mW vs 102 dB/mW). The average headphones have sensitivity of 102 dB/mW.
  • 8 Hz lower bass extension
    Beyerdynamic T51i has a lower lowest frequency than the average headphone (10 Hz vs 18 Hz). The average headphones reach a lowest frequency of 18 Hz.
  • 3,000 Hz higher treble extension
    Beyerdynamic T51i has a higher highest frequency than the average headphone (23,000 Hz vs 20,000 Hz). The average headphones reach a highest frequency of 20,000 Hz.
  • 21 dB higher max SPL
    Beyerdynamic T51i has a higher max SPL than the average headphone (131 dB vs 110 dB). The average headphones reach a max SPL of 110 dB.
  • Direct 3.5 mm plug
    Beyerdynamic T51i includes a direct 3.5 mm plug, the average headphone does not. 38.8% of headphones have a 3.5 mm male connector.
  • Clear call microphone
    Beyerdynamic T51i offers a clear call microphone, while the average headphone does not. 45.6% of headphones support noise-canceling microphones.
  • On-device controls
    Beyerdynamic T51i includes on-device controls, the average headphone does not. 46.8% of headphones support on-device controls.
  • In-line controls
    Beyerdynamic T51i includes in-line controls, the average headphone does not. 36.4% of headphones support in-line controls.
  • Fixed cable
    Beyerdynamic T51i has a fixed cable, while the average headphone has a detachable one. 62% of headphones have a detachable cable.
  • Fixed cable
    Beyerdynamic T51i has a fixed cable, while the average headphone has a detachable one. 62% of headphones have a detachable cable.
    What it is: Cable can be removed or replaced
    When it matters: When you care about easier cable replacement, simpler storage, or the option to swap to shorter, longer, or upgraded leads.

    Importance: MEDIUM

    Beyerdynamic T51i has a fixed cable, while the average headphone has a detachable one. 62% of headphones have a detachable cable.
  • 4.65x less popular
    Beyerdynamic T51i is less popular than the average headphone (1.00 vs 4.646).
    What it is: An indicator based on the number of reviews received by the headphones.
    When it matters: When you prefer headphones that have already been chosen and reviewed by many other users.
    Beyerdynamic T51i is less popular than the average headphone (1.00 vs 4.646).1 vs 4.65
  • 2.44x more expensive
    Beyerdynamic T51i is more expensive than the average headphone (£220 vs £90).
    Beyerdynamic T51i is more expensive than the average headphone (£220 vs £90).£220 vs £90

Graphic comparison of Beyerdynamic T51i and

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Third-party reviews

What customers like about Beyerdynamic T51i?

  • Excellent sound quality with clear, detailed audio and impactful bass
  • Premium build quality featuring durable brushed metal and spring steel construction
  • Lightweight and compact design, ideal for portable use and commuting
  • High level of comfort with soft memory foam ear pads and reasonable clamping force
  • Effective passive noise isolation that seals out ambient environment noise
  • Includes a high-quality, well-designed protective carrying case and various adapters
  • Integrated three-button inline remote and microphone for convenient calls and media control

What customers dislike about Beyerdynamic T51i?

  • Fixed, non-detachable cable makes replacement difficult if damaged
  • Relatively high price point compared to some other portable on-ear competitors
  • Inline remote functionality is fully optimized for iOS, with limited compatibility for Android or Windows devices
  • Clamping force can feel tight for users with larger heads, potentially causing long-term discomfort
  • Buttons on the inline remote can be difficult to distinguish by touch
  • Sound signature is warm and bass-boosted, which may not appeal to those seeking a perfectly neutral profile

Expert reviews

H
headphone.guru
15/10/2014

The Beyerdynamic T51i is a solidly built, lightweight, and maturely designed portable on-ear headphone featuring rugged silvery metal frames and soft synthetic leather padding. Ideal for travel, it offers an exceptionally high level of passive noise isolation, keeping external ambient noise blocked out while minimizing sound leakage to an absolute bare minimum. The non-detachable,...Read more

W
whathifi.com
03/10/2014

Beyerdynamic T51i The Beyerdynamic T51i on-ear headphones deliver an exceptionally detailed and well-balanced audio performance that justifies their £245 price tag. The expert review awards them a perfect five-star rating, praising their astonishing insight, precise rhythmic timing, and substantial yet taut bass response. Built from sturdy metal, they remain impressively lightweight...Read more

M
musicphotolife.com
19/07/2016

The review highlights three distinct Beyerdynamic headphones paired with the A2 Headphone Amplifier to evaluate their audio precision and build quality. Starting with the portable, on-ear T51i (S$529), it offers detailed, musical audio with clear instrument separation, forward mids for vocals, and zero sound leakage. However, it requires a high-quality source or amplifier to truly...Read more

P
pocnetwork.net
19/06/2017

The beyerdynamic T51i is a lightweight, durable pair of on-ear headphones crafted with aluminum, matte powder-coated finishes, and a brushed steel look on the earcups. Designed for mobile use and travel, they offer a comfortable fit with earcups that swivel up, down, and sideways, accompanied by incredibly soft black cushions. The headphones feature an in-line 3-button remote and...Read more

B
beantownreview.com
23/06/2017

The Beyerdynamic T51i is a premium on-ear headphone that masterfully blends an attractive, retro metal frame with modern comfort features like leather-wrapped memory foam ear pads. It stands out for its outstanding build quality, excellent sound isolation, and a warm, balanced audio performance featuring a thick yet controlled bass presence that suits genres ranging from Hip-Hop to...Read more

S
stereophile.com
05/03/2017

Tyll Hertsens' review for Stereophile highlights the Beyerdynamic T 51 i and T 51 p as durable, "steampunk" styled portable headphones with excellent comfort and low clamping force, though they suffer from a non-detachable, tangle-prone cable. Sonically, the headphones offer a smooth, warm, and musical sound that improves upon previous models, characterized by decent isolation for...Read more

C
cnet.com
03/04/2015

The German-made Beyerdynamic T51i is a premium, relatively lightweight ($300) on-ear headphone that earns high marks for its exceptionally robust bass, excellent detail retrieval, and warm audio profile. Structurally, it features a sturdy, eye-catching, mostly metal design with memory foam ear cushions that distribute pressure evenly, ensuring an ultra-comfortable fit during long...Read more

P
pcmag.com
28/04/2015

The $299 Beyerdynamic T 51 i headphones, a high-fidelity, on-ear option, feature a lightweight design with memory foam earcups, enhanced by an Apple-optimized three-button inline remote and microphone. The audio performance is characterized by a balanced, rich sound signature, offering deep, controlled bass and bright, clear high-mids, complemented by a protective, flat-folding...Read more

D
diyaudioheaven.wordpress.com
24/01/2022

The Beyerdynamic T51i is a lightweight, closed on-ear dynamic headphone that offers an open, forward, and surprisingly large soundstage with excellent, natural midrange performance that rivals more expensive models. Built with high-quality steel and plastic components, it features a split headband design and a high-efficiency Tesla driver that allows it to achieve very high volume...Read more

H
head-fi.org
13/02/2015

The Beyerdynamic T51i features a durable, lightweight spring steel design with swiveling earcups and memory foam pads that offer high comfort for long-term wear. Pros include excellent build quality and portability, though a notable con is the non-detachable, potentially fragile cable. The headphones deliver a warm, insightful sound with strong, controlled bass, detailed treble, and...Read more

M
medium.com
15/02/2015

The Medium review by Stefan Etienne praises the Beyerdynamic T51i as robust, lightweight on-ear headphones with premium build quality, featuring solid brushed metal, comfortable leather cushioning, and 90-degree articulating drivers. The audio performance is highly regarded, described as "pure butter" and suitable for both consuming and producing audio. Medium·Stefan EtienneHowever,...Read more

H
headphonereview.com
24/02/2017

The Beyerdynamic T51i is a premium, closed-back, on-ear wired headphone retailing for $300 that delivers an exceptional, detailed audio profile aimed at audiophiles. Pros highlighted in the review include its simple, beautiful, and incredibly lightweight (174g) metal frame design, which ensures top-tier comfort despite minimal padding. Sound-wise, it excels with a deep, natural bass...Read more

K
kopfhoerer.de
30/06/2026

The Beyerdynamic T 51 i is a highly capable, lightweight, closed-back on-ear headphone that serves as a worthy successor to the previous T 50 model. Weighing just 168 grams, its design utilizes premium, sturdy metal construction alongside plush faux-leather ear padding that exerts minimal clamping pressure, making it exceptionally comfortable for extended listening sessions....Read more

C
computerbild.de
04/07/2014

The Beyerdynamic T 51i is a premium, wired mobile headphone made in Germany that polarizes users with its utilitarian, mechanical design reminiscent of a metal construction kit. Moving away from the trendy, colorful high-gloss plastics favored by its competitors, its construction consists heavily of robust stainless steel and leather. While it is not a lightweight option, it...Read more

Video reviews

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