Short answer: the Sennheiser HD 550. It ranks #5 of 165 over-ear headphones by sound quality, rated 4.5/5, at $199.95; the Sennheiser HD 505 ranks #21, rated 4.3/5, at $199.95. With prices this close, go by the sound-quality ranking rather than the cost.
Why pick the Sennheiser HD 505: A preference score of 88 in oratory1990’s measurement puts it among the closest to the Harman target, with the midrange from 200 Hz to 6 kHz within about 0.5 dB of target, so vocals and instruments sound natural and unforced. The tradeoff: Sub-bass under 60 Hz sits about 6 dB below target, so deep synth bass and kick drum weight are thin.
What the Sennheiser HD 550 does well: A preference score of 94 in oratory1990’s measurement, with only 1.63 dB of deviation and an almost perfectly neutral tilt, means voices, instruments and mixes sound natural and accurate. The catch: Sub-bass averages 6 dB below target and falls 6 dB under by 34 Hz, so deep electronic bass and organ notes lack rumble.
Buy the Sennheiser HD 550. It is rated higher for sound quality than the Sennheiser HD 505 at the same price, so only choose the other one for a particular feature it does better.
Still deciding? The full Headphones rankings cover every ranked option.
Specifications Side By Side
| Sennheiser HD 505 | Sennheiser HD 550 | |
|---|---|---|
| Price | $199.95 | $199.95 |
| Ranked | #21 of 165 in Over-Ear Headphones | #5 of 165 in Over-Ear Headphones |
| Form Factor | Over-ear | Over-ear |
| Harman Preference Score | 88 (measured by oratory1990, via AutoEQ) | 94 (measured by oratory1990, via AutoEQ) |
| Deviation From Target | 1.85 dB standard deviation | 1.63 dB standard deviation |
| Tonal Tilt | +0.17 (negative is warmer, positive brighter) | +0.01 (negative is warmer, positive brighter) |
| Sub-bass Extension | Falls 6 dB below target at 32 Hz (-6.5 dB at 30 Hz) | Falls 6 dB below target at 34 Hz (-6.8 dB at 30 Hz) |
| Connection | Wired | Wired |
| Back | Open | Open |
| Driver Type | Dynamic | Dynamic |
| Impedance | 120 ohms | 150 ohms |
| Sensitivity | 107.9 dB SPL/V | 106.7 dB/mW |
| Weight | 0.5 lbs (237 g) | 0.5 lbs (237 g) |
| Frequency Response | 12Hz - 38.5kHz (Manufacturer specified) | 6Hz - 39.5kHz (Manufacturer specified) |
| Drivers | - | 1 x 38mm dynamic |
| Built-in Microphone | - | No |
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How Sennheiser HD 550 compares with other leading options:
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- Sennheiser HD 550 vs Sennheiser HD 820
- Sennheiser HD 550 vs Sennheiser HD 569
Prices on this page were last checked October 10, 2026 at 5:37 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
Sennheiser HD 505: $199.95 Amazon eBay
Pros: A preference score of 88 in oratory1990’s measurement puts it among the closest to the Harman target, with the midrange from 200 Hz to 6 kHz within about 0.5 dB of target, so vocals and instruments sound natural and unforced. The 120 ohm impedance and 107.9 dB per volt sensitivity let it run from a decent DAC or portable amp, and at 237 g the open-back design is light.
Cons: Sub-bass under 60 Hz sits about 6 dB below target, so deep synth bass and kick drum weight are thin. A narrow 9 dB dip near 9.9 kHz and treble running about 2.7 dB low soften cymbals and make it a little dark on airy recordings. Being open-back it leaks sound and offers no isolation.
Full Sennheiser HD 505 review and specifications →
| Back | Open |
|---|---|
| Connection | Wired |
| Deviation From Target | 1.85 dB standard deviation |
| Driver Type | Dynamic |
| Form Factor | Over-ear |
| Frequency Response | 12Hz - 38.5kHz (Manufacturer specified) |
| Harman Preference Score | 88 (measured by oratory1990, via AutoEQ) |
| Impedance | 120 ohms |
| Sensitivity | 107.9 dB SPL/V |
| Sub-bass Extension | Falls 6 dB below target at 32 Hz (-6.5 dB at 30 Hz) |
| Tonal Tilt | +0.17 (negative is warmer, positive brighter) |
| Weight | 0.5 lbs (237 g) |
EQ preset to match the Harman target
Set a preamp of -6.3 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 | +7.0 dB | 0.70 |
| Peak | 9,030 Hz | +3.9 dB | 2.25 |
| Peak | 84 Hz | -2.7 dB | 0.44 |
| Peak | 560 Hz | +1.1 dB | 1.13 |
| Peak | 1,256 Hz | -1.5 dB | 1.71 |
| High shelf | 10,000 Hz | -2.5 dB | 0.70 |
| Peak | 3,218 Hz | -1.8 dB | 2.89 |
| Peak | 5,479 Hz | -2.6 dB | 4.99 |
| Peak | 4,145 Hz | +2.5 dB | 5.93 |
| Peak | 6,870 Hz | +2.4 dB | 5.70 |
- Reviews, Comparisons and Sound Samples
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Sennheiser HD 550: $199.95 B&H Photo Video eBay
Pros: A preference score of 94 in oratory1990’s measurement, with only 1.63 dB of deviation and an almost perfectly neutral tilt, means voices, instruments and mixes sound natural and accurate. Midrange and presence stay within about 1 dB of target, so vocals are clear without any harshness. At 237 g it is light, and 106.7 dB/mW sensitivity lets it reach normal levels from most sources despite its 150 ohm impedance.
Cons: Sub-bass averages 6 dB below target and falls 6 dB under by 34 Hz, so deep electronic bass and organ notes lack rumble. A 5.9 dB dip near 9.5 kHz slightly softens cymbal shimmer, and the open back leaks sound and offers no isolation. The Philips Fidelio X2HR earns the same rating for less money.
Full Sennheiser HD 550 review and specifications →
| Released | Mar 2025 (1 year ago) |
|---|---|
| Back | Open |
| Built-in Microphone | No |
| Connection | Wired |
| Deviation From Target | 1.63 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x 38mm dynamic |
| Form Factor | Over-ear |
| Frequency Response | 6Hz - 39.5kHz (Manufacturer specified) |
| Harman Preference Score | 94 (measured by oratory1990, via AutoEQ) |
| Impedance | 150 ohms |
| Sensitivity | 106.7 dB/mW |
| Sub-bass Extension | Falls 6 dB below target at 34 Hz (-6.8 dB at 30 Hz) |
| Tonal Tilt | +0.01 (negative is warmer, positive brighter) |
| Weight | 0.5 lbs (237 g) |
EQ preset to match the Harman target
Set a preamp of -6.3 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 | +8.0 dB | 0.70 |
| Peak | 67 Hz | -3.4 dB | 0.34 |
| Peak | 9,968 Hz | +3.2 dB | 1.23 |
| Peak | 1,280 Hz | -2.1 dB | 1.99 |
| Peak | 2,040 Hz | +2.2 dB | 1.90 |
| High shelf | 10,000 Hz | -4.3 dB | 0.70 |
| Peak | 4,135 Hz | +2.3 dB | 5.98 |
| Peak | 5,001 Hz | -1.7 dB | 5.47 |
| Peak | 56 Hz | -0.7 dB | 2.46 |
| Peak | 83 Hz | +0.6 dB | 3.02 |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons