Fostex TH900 vs Fostex TH900mk2

Last updated: October 12, 2026

Short answer: the Fostex TH900mk2. It ranks #161 of 231 over-ear headphones by sound quality, rated 3.2/5, at $1,399.98; the Fostex TH900 ranks #206, rated 2.5/5, and costs $1,999.99, which makes this an easy call rather than a real tradeoff.

Fostex TH900 vs Fostex TH900mk2

The case for the Fostex TH900: The closed back isolates well, and at 25 ohms and 100 dB/mW it plays loud from modest sources without a dedicated amp. The catch: A preference score of 48 in crinacle’s measurement places it well away from the Harman target, so most listeners will hear a strongly colored balance unless they apply EQ.

The Fostex TH900mk2 is the better-sounding choice. Sub-bass and bass sit about 2.7 and 3.7 dB above target, giving a full, weighty low end with strong kick drums and bass guitar. The catch: A 8 dB peak near 5.4 kHz makes vocals, snares and electric guitars sound sharp or shouty, while a 8.3 dB dip near 9.4 kHz leaves the upper treble uneven.

Buy the Fostex TH900mk2. It is rated higher for sound quality than the Fostex TH900 and costs less, which makes it the one to get unless you need something the other one does better.

Looking for alternatives? See the complete Headphones rankings.

Specifications Side By Side

Fostex TH900 Fostex TH900mk2
Price$1,999.99$1,399.98
Ranked#206 of 231 in Over-Ear Headphones#161 of 231 in Over-Ear Headphones
Form FactorOver-earOver-ear
Harman Preference Score48 (measured by crinacle, via AutoEQ)63 (measured by oratory1990, via AutoEQ)
Deviation From Target3.58 dB standard deviation2.94 dB standard deviation
Tonal Tilt-1.38 (negative is warmer, positive brighter)-0.94 (negative is warmer, positive brighter)
ConnectionWiredWired
BackClosedClosed
Driver TypeDynamicDynamic
Drivers1 x 50mm dynamic1 x 50mm dynamic
Impedance25 ohms25 ohms
Sensitivity100 dB/mW100 dB/mW
Weight0.9 lbs (400 g)-
Frequency Response5Hz - 45kHz (Manufacturer specified)5Hz - 45kHz (Manufacturer specified)
Built-in MicrophoneNoNo
Sub-bass Extension-Within 6 dB of target down to 20 Hz (+2.6 dB at 30 Hz)

More worthwhile head-to-heads for Fostex TH900mk2:

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The Two Headphones In Full

Fostex TH900: $1,999.99 Amazon $1,999.99 eBay

Fostex TH900 ranking card

Newer model: the Fostex TH900mk2, ranked higher, rated 3.2/5. See every Fostex TH900 generation.

Pros: The closed back isolates well, and at 25 ohms and 100 dB/mW it plays loud from modest sources without a dedicated amp. Its large 50 mm dynamic driver and warm leaning tuning suit listeners who prefer a rich, colored sound, and it matches the rating of the AKG K872 Pro.

Cons: A preference score of 48 in crinacle’s measurement places it well away from the Harman target, so most listeners will hear a strongly colored balance unless they apply EQ. The Sennheiser HD 820 rates higher at about the same price, and the 400 g weight is heavy for an over-ear.

Released2012 (14 years ago)
BackClosed
Built-in MicrophoneNo
ConnectionWired
Deviation From Target3.58 dB standard deviation
Driver TypeDynamic
Drivers1 x 50mm dynamic
Form FactorOver-ear
Frequency Response5Hz - 45kHz (Manufacturer specified)
Harman Preference Score48 (measured by crinacle, via AutoEQ)
Impedance25 ohms
Sensitivity100 dB/mW
Tonal Tilt-1.38 (negative is warmer, positive brighter)
Weight0.9 lbs (400 g)
EQ preset to match the Harman target

Set a preamp of -5.7 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by AutoEQ from its measured frequency response.

FilterFrequencyGainQ
Low shelf105 Hz-2.3 dB0.70
Peak185 Hz-5.4 dB0.55
Peak2,463 Hz+5.8 dB1.46
Peak470 Hz+4.9 dB1.33
Peak5,406 Hz-8.1 dB4.49
High shelf10,000 Hz-3.9 dB0.70
Peak982 Hz-0.9 dB3.27
Peak6,874 Hz+1.3 dB5.95
Peak797 Hz+1.1 dB6.00
Peak1,561 Hz+0.4 dB3.37

Fostex TH900mk2: $1,399.98 Amazon $1,399.98 eBay

Fostex TH900mk2 ranking card

Older model: the Fostex TH900 (ranked lower, rated 2.5/5). See every Fostex TH900 generation.

Pros: Sub-bass and bass sit about 2.7 and 3.7 dB above target, giving a full, weighty low end with strong kick drums and bass guitar. The 25 ohm, 100 dB/mW closed-back design runs easily from a phone or portable amp, and presence and air are both lifted about 2.4 dB for added sparkle.

Cons: A 8 dB peak near 5.4 kHz makes vocals, snares and electric guitars sound sharp or shouty, while a 8.3 dB dip near 9.4 kHz leaves the upper treble uneven. Upper mids from 1 to 3 kHz sit about 1.5 dB under target, so the tonal balance feels bass-heavy. There is no built-in microphone.

BackClosed
Built-in MicrophoneNo
ConnectionWired
Deviation From Target2.94 dB standard deviation
Driver TypeDynamic
Drivers1 x 50mm dynamic
Form FactorOver-ear
Frequency Response5Hz - 45kHz (Manufacturer specified)
Harman Preference Score63 (measured by oratory1990, via AutoEQ)
Impedance25 ohms
Sensitivity100 dB/mW
Sub-bass ExtensionWithin 6 dB of target down to 20 Hz (+2.6 dB at 30 Hz)
Tonal Tilt-0.94 (negative is warmer, positive brighter)
EQ preset to match the Harman target

Set a preamp of -4.9 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by AutoEQ from its measured frequency response.

FilterFrequencyGainQ
Low shelf105 Hz-0.1 dB0.70
Peak189 Hz-3.6 dB0.18
Peak2,364 Hz+5.5 dB1.54
Peak5,351 Hz-8.4 dB4.70
Peak454 Hz+5.3 dB1.17
High shelf10,000 Hz-3.8 dB0.70
Peak81 Hz+0.5 dB2.33
Peak39 Hz-0.3 dB1.38
Peak196 Hz-0.3 dB1.57
Peak292 Hz+0.3 dB2.64