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| Price | $21.90 | $28.99 to $49.00 | $53.95 | $21.99 to $39.95 | $60.15 to $66.49 |
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| Release date | May 15, 2003 | January 01, 1984 | May 15, 2003 | May 15, 2003 | |
| The Bottom Line | The sound quality of these bargain-priced, solidly built phones didn't grab us. | Koss hit a home run with the PortaPros. Love or hate the design, there's no denying the sound quality here: they're the ideal companion for mobile audiophiles and home theater enthusiasts. | This affordable model offers the detail and transparency of expensive high-end speakers. | These macho headphones can rock out like pro models. | |
| Similar Products | Compare more products | Compare more products | Compare more products | Compare more products | Compare more products |
| Features | |||||
| Response Bandwidth | 18 - 20000 Hz | 15 - 25000 Hz | 15 - 20000 Hz | 18 - 18000 Hz | 10 - 25000 Hz |
| Localization | Info unavailable | Info unavailable | English | Info unavailable | English |
| Headphones Form Factor | Ear-cup | Semi-open | Ear-cup | Ear-cup | Ear-cup |
| Sound Output Mode | Stereo | Stereo | Stereo | Stereo | Stereo |
| Color | Info unavailable | Info unavailable | Info unavailable | Black | Info unavailable |
| Connectivity Technology | Wired - None | Wired | Wired - None | Wired - None | Wired |
| Headphones Type | Headphones - Binaural | Headphones - Binaural | Headphones - Binaural | Headphones - Binaural | Headphones - Binaural |
| Product Type | Headphones - Wired - None | Headphones - Wired | Headphones - Wired - None | Headphones - Wired - None | Headphones - Wired |
| Recommended Use | Home audio system | Portable audio system | Home audio system | Home audio system Portable audio system | Home audio system Professional audio system |
| Product Description | Koss UR 29 - Headphones | Koss PortaPro Headphones | Koss PRO 3AA - Headphones | Sennheiser HD 202 - Headphones | Koss PRO 4AA - Headphones |
| Manufacturer Warranty | Limited lifetime warranty | Limited lifetime warranty | Limited lifetime warranty | 2 years warranty | Limited lifetime 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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