Sendy Peacock vs Fostex TH900mk2

Short answer: the Sendy Peacock. It ranks #150 of 216 over-ear headphones by sound quality, rated 3.3/5, at $1,499. The Fostex TH900mk2 ranks #158, rated 3.2/5, at $1,399.98, $99.02 cheaper, a saving that is not big enough to make up the sound-quality gap.

The case for the Sendy Peacock: The open-back 88mm planar driver gives a spacious presentation, and at 50 ohms and 103 dB sensitivity it is easy enough to drive from a modest amp or dongle. The tradeoff: Presence is about 4 dB low and a 8.7 dB dip near 9.9 kHz softens cymbals and string detail, so the top end sounds subdued.

What the Fostex TH900mk2 does well: 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. Watch for: 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 Sendy Peacock. It is rated higher for sound quality, and the $99.02 you would save on the Fostex TH900mk2 does not close the gap.

Looking for alternatives? See the complete Headphones rankings.

Specifications Side By Side

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• Audeze MM-500 vs Fostex TH900mk2

Prices on this page were last checked October 11, 2026 at 4:59 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.

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The Two Headphones In Full

Sendy Peacock: $1,499.00 Amazon eBay

Pros: The open-back 88mm planar driver gives a spacious presentation, and at 50 ohms and 103 dB sensitivity it is easy enough to drive from a modest amp or dongle. Bass from 60 to 200 Hz lands almost exactly on target, and low mids are slightly full at about 1.6 dB above it, giving a warm, smooth tone.

Cons: Presence is about 4 dB low and a 8.7 dB dip near 9.9 kHz softens cymbals and string detail, so the top end sounds subdued. Sub-bass is roughly 5 dB under target. At 578 g it is heavy, and the open back leaks sound and offers no isolation.

Full Sendy Peacock review and specifications →

Released	Aug 2023 (3 years ago)
Back	Open
Connection	Wired
Deviation From Target	2.78 dB standard deviation
Driver Type	Planar magnetic
Drivers	1 x 88mm planar magnetic
Form Factor	Over-ear
Frequency Response	20Hz - 40kHz (Manufacturer specified)
Harman Preference Score	65 (measured by oratory1990, via AutoEQ)
Impedance	50 ohms
Sensitivity	103 dB
Sub-bass Extension	Falls 6 dB below target at 40 Hz (-7.1 dB at 30 Hz)
Tonal Tilt	-0.90 (negative is warmer, positive brighter)
Weight	1.3 lbs (578 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.

Filter	Frequency	Gain	Q
Low shelf	105 Hz	+6.3 dB	0.70
Peak	127 Hz	-3.6 dB	0.26
Peak	4,272 Hz	+3.4 dB	0.39
Peak	10,000 Hz	+1.2 dB	1.54
Peak	974 Hz	-3.5 dB	2.18
High shelf	10,000 Hz	-4.5 dB	0.70
Peak	4,260 Hz	+2.8 dB	3.45
Peak	2,978 Hz	-2.7 dB	2.66
Peak	1,869 Hz	+2.6 dB	4.50
Peak	64 Hz	-0.6 dB	2.10

• Reviews, Comparisons and Sound Samples
  • AutoEQ results for the Sendy Peacock (oratory1990 measurement)
• Head-to-Head Comparisons
  • Sendy Peacock vs Audeze MM-500
  • Sendy Peacock vs Audio-Technica ATH-AWAS
  • Sendy Peacock vs Denon AH-D9200

Fostex TH900mk2: $1,399.98 Amazon eBay

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.

Full Fostex TH900mk2 review and specifications →

Back	Closed
Built-in Microphone	No
Connection	Wired
Deviation From Target	2.94 dB standard deviation
Driver Type	Dynamic
Drivers	1 x 50mm dynamic
Form Factor	Over-ear
Frequency Response	5Hz - 45kHz (Manufacturer specified)
Harman Preference Score	63 (measured by oratory1990, via AutoEQ)
Impedance	25 ohms
Sensitivity	100 dB/mW
Sub-bass Extension	Within 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.

Filter	Frequency	Gain	Q
Low shelf	105 Hz	-0.1 dB	0.70
Peak	189 Hz	-3.6 dB	0.18
Peak	2,364 Hz	+5.5 dB	1.54
Peak	5,351 Hz	-8.4 dB	4.70
Peak	454 Hz	+5.3 dB	1.17
High shelf	10,000 Hz	-3.8 dB	0.70
Peak	81 Hz	+0.5 dB	2.33
Peak	39 Hz	-0.3 dB	1.38
Peak	196 Hz	-0.3 dB	1.57
Peak	292 Hz	+0.3 dB	2.64

• Reviews, Comparisons and Sound Samples
  • AutoEQ results for the Fostex TH900mk2 (oratory1990 measurement)
• Head-to-Head Comparisons
  • Fostex TH900mk2 vs Audio-Technica ATH-AWAS
  • Fostex TH900mk2 vs Beyerdynamic DT 1350
  • Fostex TH900mk2 vs Audeze MM-500