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| Price | $14.55 | $7.68 to $17.77 | $9.30 to $19.99 | $29.07 to $41.07 | $15.99 to $49.99 |
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| Release date | March 15, 2008 | November 18, 2008 | |||
| The Bottom Line | The Sony MDR-AS20J Active Headphones are a suitable choice for MP3 player owners who simply want a more secure pair of earphones for the gym, but don't need better audio quality than that of stock earbuds. | The Sony MDR-NC7 Noise Canceling headphones are an OK option for travel fiends operating on a strict budget. | |||
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| Features | |||||
| Response Bandwidth | 18 - 22000 Hz | 20 - 20000 Hz | 18 - 22000 Hz | 30 - 20000 Hz | 20 - 21000 Hz |
| Localization | Info unavailable | Info unavailable | Info unavailable | Info unavailable | English |
| Headphones Form Factor | Clip-on | Clip-on | Over-the-ear | Ear-cup | Ear-cup |
| Sound Output Mode | Stereo | Stereo | Stereo | Stereo | Stereo |
| Color | White | Info unavailable | Info unavailable | White | Black |
| Connectivity Technology | Wired - None | Wired | Wired | Wired | Wired |
| Headphones Type | Headphones - Binaural | Headphones - Binaural | Headphones - Binaural | Headphones - Binaural | Headphones - Binaural |
| Active Noise Canceling | Info unavailable | Info unavailable | Info unavailable | Yes | Info unavailable |
| Product Type | Headphones - Wired - None | Headphones - Wired | Headphones - Wired | Headphones - Wired | Headphones - Wired |
| Recommended Use | Portable audio system | Portable audio system | Portable audio system | Info unavailable | PC multimedia Home audio system |
| Product Description | Sony MDR J20/WHITE - Headphones | Sony MDR J11G - Headphones | Sony MDR AS20J - Headphones | Sony MDR NC7/WHI - Headphones | Audio-Technica ATH M3X - Headphones |
| Manufacturer Warranty | Info unavailable | Info unavailable | Info unavailable | Info unavailable | 1 year warranty |
| Remote Control | None | None | Info unavailable | None | None |
| Full specifications | Full specifications | Full specifications | Full specifications | Full specifications | Full specifications |
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