Sennheiser HD 660S vs Sennheiser HD 660S2
Better figure, where one is clearly better
| SennheiserHD 660S | SennheiserHD 660S2 | |
|---|---|---|
| Overview | ||
| Released | October 2017 | February 2023 |
| Sound | ||
| Type | Over-ear | Over-ear |
| Noise cancelling | No | No |
| Driver size | 38 mm | 38 mm |
| Back | Open | Open |
| Impedance | 150 ohms | 300 ohms |
| Bluetooth codecs | None (wired) | None (wired) |
| Drivers | Dynamic, open, diffuse-field equalised; 42 mm transducer with 38 mm diaphragm and aluminium voice coil; ventilated drive unit with steel mesh; transducers matched in pairs; 9 – 41,500 Hz (–10 dB); 104 dB SPL at 1 kHz (1 Vrms); THD ≤ 0.04% (1 kHz, 100 dB); max. 500 mW long-term input power | Dynamic, open; 8 – 41,500 Hz; 104 dB SPL (1 kHz, 1 Vrms); THD < 0.04% (1 kHz, 100 dB); lighter voice coil than the HD 660S, with the transducer's resonant frequency lowered from 110 Hz to 70 Hz |
| Battery | ||
| Listening time (maker's claim) | No battery (wired) | No battery (wired) |
| Design | ||
| Weight | 260 g | 260 g |
| Headphone cable | Yes | Yes |
| Fit and ear tips | Over-ear (circumaural), open-back; contact pressure approx. 6.0 N ± 1.0 N; replaceable ear pads | Over-ear (circumaural), open-back |
| Works with | Detachable 3 m OFC cables with gold-plated 6.35 mm unbalanced and 4.4 mm balanced plugs; 6.35 mm to 3.5 mm adapter; optional CH 650 S cable with 4-pin XLR sold separately | Detachable 1.8 m cables with a 6.3 mm plug and a balanced 4.4 mm plug; 6.3 mm to 3.5 mm adapter |
| In the box | HD 660S headphones, cable with 6.35 mm plug, cable with 4.4 mm balanced plug, 6.35 mm to 3.5 mm adapter, instruction manual, storage box | HD 660S2 headphones, 1.8 m cable with 6.3 mm plug, 1.8 m cable with 4.4 mm balanced plug, 6.3 mm to 3.5 mm adapter, carry pouch |
