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| Price | $149.99 | $34.99 to $42.27 | $65.94 | $88.18 to $199.95 | $99.95 to $199.95 |
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| Release date | January 01, 1984 | May 15, 2003 | July 13, 2007 | November 01, 2001 | |
| The Bottom Line | For smaller headphones, the QZ-2000s provide impressive noise cancellation and big-bottomed bass. | 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. | These macho headphones can rock out like pro models. | The JVC HA-NC250 Noise Canceling Headphones make a great travel companion for those who demand quality sound. And they may not be cheap, but they seem that way next to the Bose QuietComfort 3. | Sennheiser's versatile headphones sound great on DVDs and all kinds of music. |
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| Features | |||||
| Response Bandwidth |
145 - 20000 Hz |
15 - 25000 Hz |
10 - 25000 Hz |
Info unavailable |
8 - 25000 Hz |
| Localization |
English |
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 |
Black |
Info unavailable | Info unavailable | Info unavailable |
Black |
| Connectivity Technology |
Wired |
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 |
Headphones - Wired |
Headphones - Wired |
Headphones - Wired |
Headphones - Wired |
| Recommended Use | Info unavailable |
Portable audio system |
Professional audio system Home audio system |
Info unavailable |
Professional audio system Home audio system |
| Product Description |
Koss QZ 2000 - Headphones |
Koss PortaPro Headphones |
Koss PRO 4AA - Headphones |
JVC HA NC250 - Headphones |
Sennheiser HD 280 - Headphones |
| Manufacturer Warranty |
Limited lifetime warranty |
Limited lifetime warranty |
Limited lifetime warranty |
Info unavailable |
2 years warranty |
| Remote Control |
None |
None |
None |
None |
None |
| Full specifications | Full specifications | Full specifications | Full specifications | Full specifications | Full specifications |
| Buying choices |
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