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| Product | Sony MDR-EX71SL (Black) | Panasonic ErgoFit RP-HJE120-D (Orange) | Klipsch Image S4  | Koss PortaPro (with Case) |
| Price | $81.57 to $99.00 | $4.03 to $63.10 | $49.89 | $39.99 to $59.99 |
| CNET editors' rating | 3.5 stars | 4 stars | 4.5 stars | 4 stars |
| Average user rating | 3 stars | 4 stars | 3.5 stars | 4 stars |
| Release date | Info unavailable | Info unavailable | Info unavailable | January 1, 1984 |
| Bottom line | If you're searching for reasonably priced premium earbuds, stop here and take a hard look at the Sony MDR-EX71SL headphones. | For under $10, you'll be hard-pressed to find in-ear headphones that sound better and are more comfortable than the Panasonic ErgoFit RP-HJE120s. | The
Klipsch Image S4 earphones offer up sound quality on par with and better than sets that cost many times as much; they are a spectacular choice for anyone looking for new earbuds. | 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. |
| Product Description | Sony MDR EX71SL - Headphones | Panasonic RP HJE120-D - Headphones | Klipsch Image S4 - Headphones | Koss PortaPro - Headphones |
| Packaged Quantity | 1 | 1 | 1 | 1 |
| Product Type | Headphones - Wired | Headphones - Wired | - Wired Headphones | Headphones - Wired |
| Recommended Use | Portable audio system | Portable audio system | Portable audio system | Portable audio system Home audio system |
| Headphones Type | Headphones - Binaural | Headphones - Binaural | Binaural Headphones | Headphones - Binaural |
| Headphones Form Factor | Ear-bud | In-ear | In-ear | On-ear |
| Connectivity Technology | Wired | Wired | Wired | Wired |
| Sound Output Mode | Stereo | Stereo | Stereo | Stereo |
| Audio Specifications | Frequency Response 6 - 23000 Hz - Sensitivity 100 dB/mW - Impedance 16 Ohm | Frequency Response 20 - 20000 Hz - Sensitivity 96 dB/mW - Impedance 16 Ohm | - Sensitivity 110 dB/mW - Impedance 18 Ohm Frequency Response 10 - 19000 Hz | Frequency Response 15 - 25000 Hz - Sensitivity 101 dB/mW - Impedance 60 Ohm |
| Remote Control | None | None | Info unavailable | None |
| Full specifications | Full specifications | Full specifications | Full specifications | Full specifications |
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