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| Product | Sennheiser PX 100-IIi Headset (Black) | Koss PortaPro (with Case)  | MEElectronics HT-21 Travel (Black) | Sennheiser PX100 (Black) | JVC Flats (Black) |
| Price | $89.95 | $39.99 to $59.99 | $24.85 to $25.98 | $175.99 | $9.89 to $14.99 |
| CNET editors' rating | 4 stars | 4 stars | 4 stars | 3.5 stars | 4 stars |
| Average user rating | 4 stars | 4 stars | 4.5 stars | 4 stars | 4.5 stars |
| Release date | Info unavailable | January 1, 1984 | Info unavailable | November 15, 2002 | November 22, 2010 |
| Bottom line | Despite their lightweight structure, the Sennheiser PX100-IIi headphones are surprisingly powerful, and we recommend them for travelers, students, and anyone else shopping for new open-backed headphones. | 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. | You may be fooled by their featherweight design, but the MEElectronics HT-21s earn our recommendation for their ample soundstage, subtle aesthetic, and portable convenience. | The PX100 is a good choice for travelers seeking a compact headphone design. | Though they look a little cheap, the JVC Flats are lightweight, comfortable on-ear headphones that sound surprisingly good for sub-$15 headphones. |
| Product Description | Sennheiser PX 100-III - Headset | Koss PortaPro - Headphones | MEElectronics HT-21 - Headphones | Sennheiser PX 100 - Headphones | JVC HA S160-B |
| Packaged Quantity | 1 | 1 | 1 | 1 | 1 |
| Product Type | Headset - Wired | Headphones - Wired | Headphones - Wired | Headphones - Wired | - Wired |
| Recommended Use | Cellular phone Portable audio system | Portable audio system Home audio system | Info unavailable | Portable audio system | Cellular phone Portable audio system |
| Headphones Type | Headset - Binaural | Headphones - Binaural | Headphones - Binaural | Headphones - Binaural | Binaural |
| Headphones Form Factor | On-ear | On-ear | Full size | On-ear | Info unavailable |
| Connectivity Technology | Wired | Wired | Wired | Wired | Wired |
| Sound Output Mode | Stereo | Stereo | Stereo | Stereo | Stereo |
| Audio Specifications | Frequency Response 15 - 27000 Hz - Sensitivity 114 dB - Impedance 32 Ohm | Frequency Response 15 - 25000 Hz - Sensitivity 101 dB/mW - Impedance 60 Ohm | Frequency Response 20 - 20000 Hz - Sensitivity 114 dB - Impedance 32 Ohm | Frequency Response 15 - 27000 Hz - Impedance 32 Ohm | Frequency Response 12 - 24000 Hz - Sensitivity 103 dB/mW - Impedance 32 Ohm |
| Full specifications | Full specifications | Full specifications | Full specifications | Full specifications | Full specifications |
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Sennheiser PX 100-IIi Headset compare (Black)
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