Audeze LCD-X vs Fostex TH900mk2 Limited Edition: Which Headphones Are Better?

Tested using Methodology v2.0

Updated Jan 29, 2026 07:16 PM

This review is in Early access

See Fostex TH900mk2 Review

TypeOver-ear

Noise CancellingNo

EnclosureOpen-Back

Bass Amount Slightly Underemphasized (-2 dB)

WirelessNo

TransducerPlanar Magnetic

Treble Amount Underemphasized (-4 dB)

MicNo

Sound Signature Warm

TypeLocked

Noise CancellingLocked

EnclosureLocked

Bass Amount Locked

WirelessLocked

TransducerLocked

Treble Amount Locked

MicLocked

Sound Signature Locked

Recommended in 3 articles:
Wired
Music
Open-Back

Our Verdict

Audeze LCD-X

Fostex TH900mk2

Full comparison details regarding individual product score sets can be found in the section below

Variants

LCD-X (Black (Leather))
LCD-X (Black (Leather-Free))

TH900mk2 (Bordeaux Red)
TH900mk2 (Onyx Black)

Review

See Audeze LCD-X Review

Check Price

Black (Leather)

LCD-X

Bordeaux Red

TH900mk2

Black (Leather-Free)

LCD-X

B&H

Onyx Black

TH900mk2

Main Differences for

Sports And Fitness

Threshold

0.10

Sports And Fitness

5.6

0.0

No major differences between these headphones for sports and fitness. See full list of tests below.

Full Comparison

Sports And Fitness

5.6

0.0

Travel

4.3

0.0

Office Work

2.9

0.0

Wireless Gaming (In Development)

4.4

0.0

Wired Gaming (In Development)

6.5

0.0

Audio Reproduction Accuracy

7.3

0.0

Noise Isolation

0.7

0.0

Microphone (In Development)

0.0

Frequency Response Consistency

7.9

0.0

Sound

Sound Profile

Preview Graph

SAMPLE

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Normalization Frequency

600 Hz

Lock Hz

Bass Amount

Slightly Underemphasized (-2 dB)

Locked

Treble Amount

Underemphasized (-4 dB)

Locked

Sound Signature

Warm

Locked

Show Text

Frequency Response Consistency

7.9

N/A

Consistency L

Preview Graph

SAMPLE

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Consistency R

Preview Graph

SAMPLE

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Std. Deviation

0.89 dB

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Raw Frequency Response

Raw FR L

Preview Graph

SAMPLE

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Raw FR R

Preview Graph

SAMPLE

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Bass Profile: Target Compliance

8.4

N/A

Bass Profile: Target Compliance

Preview Graph

SAMPLE

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RMS Deviation From Target

3.7 dB

Lock dB

Low-Frequency Extension

22.45 Hz

Lock Hz

Low Bass

-4.81 dB

Lock dB

Mid Bass

-2.18 dB

Lock dB

High Bass

0.83 dB

Lock dB

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Mid-Range Profile: Target Compliance

9.2

N/A

Mid-Range Profile: Target Compliance

Preview Graph

SAMPLE

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RMS Deviation From Target

1.22 dB

Lock dB

Low Mid

0.77 dB

Lock dB

Mid-Mid

0.29 dB

Lock dB

High Mid

-1.79 dB

Lock dB

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Treble Profile: Target Compliance

5.9

N/A

Treble Profile: Target Compliance

Preview Graph

SAMPLE

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RMS Deviation From Target

5.25 dB

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Low Treble

-5.93 dB

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Mid Treble

-2.5 dB

Lock dB

High Treble

-6.36 dB

Lock dB

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Peaks/Dips

7.9

N/A

Peaks/Dips Graph

Preview Graph

SAMPLE

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Peaks

1.21 dB

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Dips

1.47 dB

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Stereo Mismatch

8.6

N/A

Frequency Response Mismatch

Preview Graph

SAMPLE

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Phase Response Mismatch

Preview Graph

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Weighted Amplitude Mismatch

0.11 dB

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Weighted Frequency Response Mismatch

0.95 dB

Lock dB

Weighted Phase Mismatch

1.3°

Lock°

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Group Delay

3.4

N/A

Group Delay

Preview Graph

SAMPLE

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Weighted Group Delay

2.0 ms

N/A

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Cumulative Spectral Decay

CSD

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SAMPLE

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PRTF

6.4

N/A

PRTF

Preview Graph

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PRTF Accuracy (RMS Deviation)

3.17 dB

Lock dB

PRTF Size (Avg.)

3.27 dB

Lock dB

PRTF Distance

12.08 dB

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Harmonic Distortion

9.7

N/A

Harmonics Levels

Preview Graph

SAMPLE

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THD Ratio

Preview Graph

SAMPLE

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WHD @ 94 dB SPL

0.03%

Lock%

WHD @ 104 dB SPL

0.03%

Lock%

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Electrical Aspects

Impedance

Preview Graph

SAMPLE

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Sensitivity @1kHz-1V

113.8 dB SPL

Lock dB SPL

Bluetooth Max SPL

N/A

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Virtual Soundstage

0.0

N/A

Virtual Soundstage

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SAMPLE

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Head Modeling

Locked

Speaker Modeling

Locked

Room Ambience

Locked

Head Tracking

Locked

Virtual Surround

Locked

Show Text

Test Settings

Firmware

No Firmware

Locked

Power

Passive

Locked

Connection

Wired

Locked

Codec

PCM, 24-bit, 48kHz

Locked

Test Instrument

Audio Precision APx517B

Locked

EQ

No EQ

Locked

ANC

No ANC

Locked

Tip/Pad

Default

Locked

Microphone

No Microphone

Locked

Show Text

Design

Style

Design Picture 2

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Type

Over-ear

Locked

Enclosure

Open-Back

Locked

Wireless

Locked

Transducer

Planar Magnetic

Locked

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Comfort

8.0

N/A

Comfort Picture

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Weight

1.33 lbs

Lock lbs

Clamping Force

1.3 lbs

Lock lbs

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Controls

0.0

N/A

Controls Picture

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OS Compatibility

No Controls

Locked

Ease Of Use

No Controls

Locked

Feedback

No Controls

Locked

Call/Music Control

Locked

Volume Control

Locked

Microphone Control

Locked

Channel Mixing

Locked

Noise Cancelling Control

Locked

Talk-Through

Locked

Additional Controls

Locked

Portability

5.1

N/A

Portability Picture

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L

8.3" (21.0 cm)

Lock" (Lock cm)

W

6.7" (17.0 cm)

Lock" (Lock cm)

H

4.8" (12.2 cm)

Lock" (Lock cm)

Volume

266.12 in³ (4,360.93 cm³)

Lock in³ (Lock cm³)

Transmitter Required

Locked

Show Text

Case

9.0

N/A

Case Picture

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Type

Hard case

Locked

L

11.6" (29.4 cm)

N/A

W

10.0" (25.5 cm)

N/A

H

7.4" (18.7 cm)

N/A

Volume

853.92 in³ (13,993.26 cm³)

N/A

Show Text

Build Quality

8.5

N/A

Build Quality Picture

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SAMPLE

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Show Text

Stability

6.0

N/A

Stability Picture

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Show Text

Headshots 1

Angled Picture

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Side Picture

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Headshots 2

Front Picture

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Rear Picture

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Top

Top Picture

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In The Box

In The Box Picture

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Isolation

Noise Isolation - Full Range

0.6

N/A

Noise Isolation - Full Range Graph

Preview Graph

SAMPLE

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Noise Cancelling

Locked

Overall Attenuation

-1.27 dB

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Bass

4.70 dB

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Mid

-0.44 dB

Lock dB

Treble

-9.45 dB

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Noise Isolation - Common Scenarios

0.6

N/A

Noise Isolation - Common Scenarios Graph

Preview Graph

SAMPLE

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Airplane Noise Attenuation

-1.14 dB

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Airplane Noise Isolation Audio

Office Noise Attenuation

-0.96 dB

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Office Noise Isolation Audio

Street Noise Attenuation

-1.32 dB

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Street Noise Isolation Audio

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Noise Isolation - Voice Handling

ANC Wind Handling

ANC Wind Handling Graph

SAMPLE

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ANC Wind Noise

N/A

Leakage

1.1

N/A

Leakage

Preview Graph

SAMPLE

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Leakage Audio

Overall Leakage @ 1ft

65.57 dB

Lock dB

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Microphone

Microphone Style

Integrated

Locked

In-Line

Locked

Boom

Locked

Detachable Boom

Locked

Mic

Locked

Recording Quality

0.0

N/A

Microphone Frequency Response

SAMPLE

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Recorded Speech

N/A

LFE

N/A

FR Std. Dev.

N/A

HFE

N/A

Weighted THD

N/A

Gain

N/A

Noise Handling

0.0

N/A

SpNR

SAMPLE

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SpNR

N/A

Noise Gate

Locked

Speech + Pink Noise Handling

N/A

Speech + Pink Noise Audio Sample

N/A

Speech + Subway Noise Handling

N/A

Speech + Subway Noise Audio Sample

N/A

Active Features

Battery

0.0

N/A

Battery Type

No Battery

Locked

Continuous Battery Life

N/A

Additional Charges

N/A

Total Battery Life

N/A

Charge Time

N/A

Power-Saving Feature

Locked

Audio While Charging

Locked

Passive Playback

Passive Headphone

Locked

Charging Port

None

Locked

App Support

0.0

N/A

App Picture

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SAMPLE

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App Name

No App

Locked

iOS

Locked

Android

Locked

macOS

Locked

Windows

Locked

Equalizer

Locked

ANC Control

Locked

Mic Control

Locked

Room Effects

Locked

Playback Control

Locked

Button Mapping

Locked

Surround Support

Locked

Connectivity

Wired Connection

9.9

N/A

Cable Picture

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Analog Audio

Yes

Locked

USB Audio

Locked

Detachable

Yes

Locked

Length

6.23 ft (1.90 m)

Lock ft (Lock m)

Connector

4-Pin XLR

Locked

Latency - Analog

0.2 ms

Lock ms

Latency - USB

N/A

Recorded Latency

Recorded Latency Connection

Analog

Locked

Show Text

Bluetooth Connection

0.0

N/A

Bluetooth Version

No Bluetooth

Locked

Multi-Device Pairing

Locked

Quick Pair (Android)

Locked

Quick Pair (iOS)

Locked

Line Of Sight Range

N/A

Latency - SBC

N/A

Latency - aptX

N/A

Latency - aptX Adaptive (High Quality)

N/A

Latency - aptX Adaptive (Low Latency)

N/A

Latency - LDAC

N/A

Recorded Latency

N/A

Recorded Latency Codec

No Bluetooth Audio

Locked

AAC Support

Locked

Wireless Connection (Dongle)

0.0

N/A

Line Of Sight Range

N/A

Latency - Dongle

N/A

Recorded Latency

N/A

PC Compatibility

Analog

Audio Only

Locked

Wired USB

Locked

Non-BT Wireless

Locked

Show Text

PlayStation Compatibility

PS4 Analog

Audio Only

Locked

PS4 Wired USB

Locked

PS4 Non-BT Wireless

Locked

PS5 Analog

Audio Only

Locked

PS5 Wired USB

Locked

PS5 Non-BT Wireless

Locked

Show Text

Xbox Compatibility

Xbox One Analog

Audio Only

Locked

Xbox One Wired USB

Locked

Xbox One Non-BT Wireless

Locked

Xbox Series X|S Analog

Audio Only

Locked

Xbox Series X|S Wired USB

Locked

Xbox Series X|S Non-BT Wireless

Locked

Show Text

Base/Dock

0.0

N/A

Type

No Base/Dock

Locked

USB Input

Locked

Line In

Locked

Line Out

Locked

Optical Input

Locked

RCA Input

Locked

Dock Charging

Locked

Power Supply

No Base/Dock

Locked

Check Price

Black (Leather)

LCD-X

Bordeaux Red

TH900mk2

Black (Leather-Free)

LCD-X

B&H

Onyx Black

TH900mk2