AKG K271 MKII vs Sennheiser Momentum 4 Wireless

Short answer: the AKG K271 MKII, though neither ranks well in its class. Both are rated 2.5/5 for sound quality (#124 and #125 of 134 over-ear headphones), and the AKG K271 MKII costs $214.38 against $227.38 for the Sennheiser Momentum 4 Wireless, and with sound quality even, the cheaper one is the better buy. Both are rated below 3.0/5 among the 134 over-ear headphones, so if sound quality matters, consider the Sennheiser HD 560S instead, ranked #5 at $199.95.

The case for the AKG K271 MKII: A closed-back studio design with 104 dB sensitivity at 55 ohms, so it plays loudly from a phone or laptop without an amp. The tradeoff: Bass is thin, with sub-bass about 15 dB and the 60 to 200 Hz region about 8 dB under target, so music lacks weight and punch.

What the Sennheiser Momentum 4 Wireless does well: Feature set is strong: active noise cancelling, Bluetooth 5.2 with SBC, AAC, aptX and aptX Adaptive, and a rated 60 hours of battery. Watch for: That bass boost overshoots the Harman target by a clear margin and adds about 2 dB in the low mids, which can make vocals and bass guitar thick.

Buy the AKG K271 MKII. Both are rated the same for sound quality, and it costs $13 less than the Sennheiser Momentum 4 Wireless.

Looking for alternatives? See the complete Headphones rankings.

Specifications Side By Side

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More worthwhile head-to-heads for AKG K271 MKII:

• Sony WH-1000XM5 vs AKG K271 MKII
• Jabra Evolve 40 vs AKG K271 MKII
• AKG K271 MKII vs Sennheiser HD 569
• Jabra Evolve 40 vs Sennheiser Momentum 4 Wireless
• Audio-Technica ATH-AD500X vs Jabra Evolve 40

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The Two Headphones In Full

AKG K271 MKII: $214.38 Amazon eBay

Pros: A closed-back studio design with 104 dB sensitivity at 55 ohms, so it plays loudly from a phone or laptop without an amp. Treble from 6 to 10 kHz and the lower mids land almost exactly on the Harman target in oratory1990’s measurement. A slightly bright tilt suits listeners who prefer a neutral to bright sound.

Cons: Bass is thin, with sub-bass about 15 dB and the 60 to 200 Hz region about 8 dB under target, so music lacks weight and punch. Presence from 3 to 6 kHz is down about 6 dB, with a 7.5 dB dip near 4 kHz that pulls vocals and guitars back. At 240 g with a preference score of 48, the Beats Studio3 Wireless is rated higher.

Full AKG K271 MKII review and specifications →

Released	May 2008 (18 years ago)
Back	Closed
Connection	Wired
Deviation From Target	3.85 dB standard deviation
Driver Type	Dynamic
Drivers	1 x 30mm dynamic
Form Factor	Over-ear
Frequency Response	16Hz - 28kHz (Manufacturer specified)
Harman Preference Score	48 (measured by oratory1990, via AutoEQ)
Impedance	55 ohms
Sensitivity	104 dB SPL/V
Tonal Tilt	+1.16 (negative is warmer, positive brighter)
Weight	0.5 lbs (240 g)

EQ preset to match the Harman target

Set a preamp of -6.5 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	+6.2 dB	0.70
Peak	812 Hz	-3.2 dB	0.18
Peak	4,439 Hz	+8.0 dB	1.08
Peak	145 Hz	+6.6 dB	1.69
Peak	8,134 Hz	-4.5 dB	0.99
High shelf	10,000 Hz	+2.3 dB	0.70
Peak	1,771 Hz	-3.4 dB	2.92
Peak	830 Hz	+3.3 dB	2.86
Peak	2,453 Hz	+2.0 dB	2.96
Peak	650 Hz	-2.9 dB	5.06

• Reviews, Comparisons and Sound Samples
  • AutoEQ results for the AKG K271 MKII (oratory1990 measurement)
• Head-to-Head Comparisons
  • AKG K271 MKII vs Jabra Evolve 40
  • AKG K271 MKII vs Sony WH-1000XM5
  • AKG K271 MKII vs Sennheiser HD 569

Sennheiser Momentum 4 Wireless: $227.38 Amazon eBay

Pros: Feature set is strong: active noise cancelling, Bluetooth 5.2 with SBC, AAC, aptX and aptX Adaptive, and a rated 60 hours of battery. It also plays wired and has a built-in microphone. The deep bass lift, about 9 dB in the sub-bass and 6 dB in the bass, suits listeners who like a warm, bass-heavy sound.

Cons: That bass boost overshoots the Harman target by a clear margin and adds about 2 dB in the low mids, which can make vocals and bass guitar thick. A 4.7 dB dip near 2.4 kHz followed by a 3.5 dB peak near 6.8 kHz makes the upper midrange uneven. Its preference score of 47 trails the Beats Studio3 Wireless, which is rated higher.

Full Sennheiser Momentum 4 Wireless review and specifications →

Released	Aug 2022 (4 years ago)
Active Noise Cancelling	Yes
Back	Closed
Battery Life	60 hours (Manufacturer specified)
Bluetooth Codecs	SBC, AAC, aptX, aptX Adaptive
Bluetooth Version	5.2
Built-in Microphone	Yes
Connection	Wireless and wired
Deviation From Target	3.31 dB standard deviation
Driver Type	Dynamic
Drivers	1 x 42mm dynamic
Form Factor	Over-ear
Frequency Response	6Hz - 22kHz (Manufacturer specified)
Harman Preference Score	47 (measured by oratory1990, via AutoEQ)
IP Rating	None
Sensitivity	106 dB SPL (1 kHz / 0 dB FS)
Tonal Tilt	-1.68 (negative is warmer, positive brighter)
Weight	0.6 lbs (293 g)

EQ preset to match the Harman target

Set a preamp of -6.4 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	-7.4 dB	0.70
Peak	195 Hz	-3.6 dB	1.22
Peak	2,393 Hz	+6.1 dB	1.81
Peak	1,726 Hz	+1.6 dB	1.71
Peak	2,893 Hz	-3.2 dB	5.94
High shelf	10,000 Hz	+0.5 dB	0.70
Peak	63 Hz	+1.7 dB	2.86
Peak	652 Hz	+1.2 dB	2.25
Peak	952 Hz	-1.0 dB	3.69
Peak	316 Hz	-0.9 dB	3.46

• Reviews, Comparisons and Sound Samples
  • AutoEQ results for the Sennheiser Momentum 4 Wireless (oratory1990 measurement)
• Head-to-Head Comparisons
  • Sennheiser Momentum 4 Wireless vs Jabra Evolve 40