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| Product | Koss QZ900 (Black) | Bose Quiet Comfort 15 | Sony MDR-NC200D (Black) | Audio-Technica ATH-M50 | Harman Kardon NC |
| Price | $159.00 to $249.99 | $299.00 to $299.99 | $129.95 to $241.24 | $159.00 to $159.99 | $299.00 to $299.95 |
| CNET editors' rating | Info unavailable | 4 stars | 3.5 stars | 4 stars | 4 stars |
| Average user rating | 5 stars | 4 stars | 4.5 stars | 4.5 stars | 0 stars |
| Release date | Info unavailable | August 21, 2009 | Info unavailable | Info unavailable | September 14, 2012 |
| Bottom line | Info unavailable | While they're no bargain, the Bose QuietComfort 15s currently offer the best sound and silencing capabilities in a pair of noise-canceling headphones. | If you can't afford Bose's QuietComfort noise-canceling headphones, the attractively designed and more affordable Sony MDR-NC200Ds are worth your consideration. | The Audio-Technica ATH-M50 Professional Studio Monitor Headphones are among the best available for less than $200, offering excellent sound and build quality. | While they may not be quite as comfortable as Bose's ultrapopular QC 15 headphones, the Harman Kardon NCs offer slightly better sound and have a built-in rechargeable battery to power the active noise-cancellation circuitry. |
| Product Description | Koss QZ 900 - Headphones | Bose QuietComfort 15 Acoustic Noise Cancelling - Headphones | Sony MDR NC200D - Headphones | Audio-Technica ATH M50 - Headphones | Harman/kardon NC - Headphones |
| Packaged Quantity | 1 | 1 | 1 | 1 | 1 |
| Product Type | Headphones - Wired | Headphones - Wired | Headphones - Wired | Headphones - Wired | Headphones - Wired |
| Headphones Type | Headphones - Binaural | Headphones - Binaural | Headphones - Binaural | Headphones - Binaural | Headphones - Binaural |
| Headphones Form Factor | Full size | Full size | Full size | Full size | Full size |
| Connectivity Technology | Wired | Wired | Wired | Wired | Wired |
| Sound Output Mode | Stereo | Stereo | Stereo | Stereo | Stereo |
| Audio Specifications | Frequency Response 20 - 20000 Hz - Sensitivity 100 dB - Impedance 32 Ohm | Info unavailable | Frequency Response 8 - 23000 Hz - Sensitivity 103 dB/mW - Impedance 68 Ohm | Frequency Response 15 - 28000 Hz - Sensitivity 99 dB - Impedance 38 Ohm | Frequency Response 16 - 20000 Hz |
| Full specifications | Full specifications | Full specifications | Full specifications | Full specifications | Full specifications |
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Koss QZ900 compare (Black)
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