Short answer: the Sony MDR-MV1. Both are rated 3.8/5 for sound quality (#153 and #155 of 481 over-ear headphones), and the Sony MDR-MV1 costs $418 against $479.95 for the Sennheiser HD 660S2, with sound quality a draw, the lower price decides it.
Why pick the Sennheiser HD 660S2: Oratory1990’s measurement gives it a preference score of 78 with a smooth midrange, as the band from 200 Hz to 6 kHz stays within about 1.4 dB of the Harman target and the largest peak above 1.5 kHz is under 2 dB. The tradeoff: Sub-bass falls about 6.5 dB below target and is 6 dB short by 40 Hz, and an open back means bass is felt less and sound leaks out freely.
What the Sony MDR-MV1 does well: The open back has lively, extended treble and a full low end, with sub-bass on target and bass from 60 to 200 Hz about 2.7 dB above, so it delivers real punch for an open design. The catch: Treble from 6 to 10 kHz is about 4.4 dB above target, with a 6.9 dB peak near 6.2 kHz, so cymbals, sibilance and hi hats can sound sharp or fatiguing.
Buy the Sony MDR-MV1. Both are rated the same for sound quality, and it costs $61.95 less than the Sennheiser HD 660S2.
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Oratory1990’s measurement gives it a preference score of 78 with a smooth midrange, as the band from 200 Hz to 6 kHz stays within about 1.4 dB of the Harman target and the largest peak above 1.5 kHz is under 2 dB.
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The open back has lively, extended treble and a full low end, with sub-bass on target and bass from 60 to 200 Hz about 2.7 dB above, so it delivers real punch for an open design.
Amazon $418.00 Lowest Sony $419.99 eBayPrices on this page were last checked October 16, 2026 at 5:46 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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Specifications Side By Side
| Sennheiser HD 660S2 | Sony MDR-MV1 | |
|---|---|---|
| Price | $479.95 | $418.00 |
| Ranked | #155 of 481 in Over-Ear Headphones | #153 of 481 in Over-Ear Headphones |
| Form Factor | Over-ear | Over-ear |
| Harman Preference Score | 78 (measured by oratory1990, via AutoEQ) | 78 (measured by oratory1990, via AutoEQ) |
| Deviation From Target | 2.36 dB standard deviation | 2.34 dB standard deviation |
| Tonal Tilt | -0.43 (negative is warmer, positive brighter) | -0.42 (negative is warmer, positive brighter) |
| Sub-bass Extension | Falls 6 dB below target at 40 Hz (-7.4 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-1.4 dB at 30 Hz) |
| Connection | Wired | Wired |
| Back | Open | Open |
| Driver Type | Dynamic | Dynamic |
| Drivers | 1 x 38mm dynamic | 1 x 40mm dynamic |
| Impedance | 300 ohms | 24 ohms |
| Sensitivity | 104 dB SPL/V | 100 dB/mW |
| Weight | 0.6 lbs (260 g) | 0.5 lbs (223 g) |
| Frequency Response | 8Hz - 41.5kHz (Manufacturer specified) | 5Hz - 80kHz (Manufacturer specified) |
| Built-in Microphone | No | - |
Frequency Response Compared
Both headphones’ measurements overlaid on the Harman target. Above the target sounds louder in that range, below it quieter. Each curve is the median of several independent measurements, shifted so its 500 Hz to 2 kHz average sits at 0 dB, so only the tuning is compared.
Measurement data: the Sennheiser HD 660S2 from auricularesargentina, daemonxar, filk, gadgetrytech, kuulokenurkka, listener, sai and therollo9; the Sony MDR-MV1 from audioamigo, gadgetrytech, hadoe, listener, sai and superreview, all via squig.link.
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