| Impedance | 307 Ω |
|---|---|
| Efficiency | 97.5 dB SPL/mW |
| Frequency Response | 12 - 39,000 Hz |
| Transducer Type | Dynamic |
| Operating Principle | Open |
| Ear Coupling | Over-ear |
| Weight | 260 g |
| 3rd Party Measurements | www.innerfidelity.com |
| Additional Notes | |
| "These headphones are engineered for the true audiophile. Thanks to an open circumaural design, computer optimized magnets and aluminum voice coils, you won't find cleaner, crisper stereo sound anywhere." | |
| Target SPL Requirements | ||
|---|---|---|
| Target | Power | Voltage |
| 90.0 dB | 0.18 mW | 0.23 Vrms |
| 92.5 dB | 0.32 mW | 0.31 Vrms |
| 95.0 dB | 0.56 mW | 0.42 Vrms |
| 97.5 dB | 1.0 mW | 0.55 Vrms |
| 100.0 dB | 1.8 mW | 0.74 Vrms |
| 102.5 dB | 3.2 mW | 0.99 Vrms |
| 105.0 dB | 5.6 mW | 1.31 Vrms |
| 107.5 dB | 10.0 mW | 1.75 Vrms |
| 110.0 dB | 17.8 mW | 2.34 Vrms |
| Price History | |
|---|---|
| Current | $299.00 |
| Highest | $373.00 |
| Lowest | $299.00 |
| Search Item | Amazon, eBay |
| Rank | Model | Current Price |
|---|---|---|
| - | HD 219 | $44.95 |
| - | HD 449 | $74.99 |
| - | HD 461 | $89.95 |
| - | HD 471 | $159.90 |
| - | HD 518 | $171.99 |
| - | HD 599 | $153.95 |
| #37 | HD 660 S | $489.99 |
| - | HD1 Wireless | $199.98 |
| - | Momentum 2 | $349.95 |
| - | Momentum On Ear | $175.00 |
| Model | Style | Impedance | Price |
|---|---|---|---|
| Sennheiser HD 650 | Open, Over-ear | 320 Ω | $369.93 |
| German Maestro GMP 400 | Open, Over-ear | 300 Ω | $279.00 |
| Sennheiser HD 660 S | Open, Over-ear | 150 Ω | $489.99 |
| Sennheiser HD 700 | Open, Over-ear | 167 Ω | $693.73 |
| Beyerdynamic DT 990 PRO | Open, Over-ear | 250 Ω | $128.88 |
| Beyerdynamic DT 990 Edition (250 Ω) | Open, Over-ear | 250 Ω | $154.57 |
| Beyerdynamic DT 880 PRO | Open, Over-ear | 250 Ω | $187.98 |
| Model | Peak SPL | Portable | Price |
|---|---|---|---|
| Little Dot MK II | 122.2 dB | $139.99 | |
| Schiit Vali | 120.8 dB | $119.00 | |
| Bottlehead Crack OTL | 122.6 dB | $279.00 | |
| Little Dot MK III | 122.8 dB | $278.00 | |
| Schiit Valhalla 2 | 126.4 dB | $389.00 | |
| Aune T1 Mk2 | 119.2 dB | $249.99 | |
| xDuoo TA-01 | 120.9 dB | $155.25 | |
| FiiO X1 | 106.4 dB | — | |
| FiiO X5 | 111.9 dB | $482.78 | |
| SMSL SAP-2 Pro | 118.4 dB | $69.38 |
