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| Product | Etymotic ER-4P MicroPro | Etymotic ER-4PT MicroPro | Etymotic Research HF5 Portable (Cobalt) | Sony XBA-4 | Etymotic ER-6i Isolator (white) |
| Price | $239.99 to $249.86 | $226.11 to $386.50 | $96.99 to $149.99 | $348.00 to $349.99 | MSRP: $129.99 |
| CNET editors' rating | Info unavailable | 4 stars | 4 stars | 4 stars | 4 stars |
| Average user rating | 3.5 stars | 0 stars | 2.5 stars | 3.5 stars | 3.5 stars |
| Release date | Info unavailable | Info unavailable | June 15, 2008 | Info unavailable | January 1, 2002 |
| Bottom line | Info unavailable | While the Etymotic ER-4PTs have less low-end oomph than some competing earphones in this price class, they deliver excellent sound with very accurate tonal balance. | The Etymotic hf5 earphones are an excellent option for those who want the highest level of sound isolation without sacrificing sound quality, portability, or style. | Sony's audiophile-grade XBA-4 in-ear headphones deliver highly refined sound, with potent bass, airy treble, and excellent noise-isolating performance. | Etymotic's ER-6 earbuds offer stellar sound quality. |
| Product Description | Etymotic MicroPro ER-4P (Power) - Headphones | Etymotic MicroPro ER-4PT - Headphones | Etymotic hf5 High-Fidelity Earphones - Headphones | Sony XBA 4 - Headphones | Etymotic Isolator Earphones ER-6i - 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 | Ear-bud | In-ear | In-ear | In-ear | Ear-bud |
| Connectivity Technology | Wired | Wired | Wired | Wired | Wired |
| Sound Output Mode | Stereo | Stereo | Stereo | Stereo | Stereo |
| Audio Specifications | Frequency Response 20 - 16000 Hz - Sensitivity 109 dB - Impedance 27 Ohm | - Sensitivity 90 dB - Impedance 100 Ohm Frequency Response 20 - 16000 Hz | Frequency Response 20 - 15000 Hz - Sensitivity 105 dB - Impedance 16 Ohm | Frequency Response 3 - 28000 Hz - Sensitivity 108 dB/mW - Impedance 8 Ohm | Frequency Response 50 - 16000 Hz - Sensitivity 108 dB/mW - Impedance 16 Ohm |
| Full specifications | Full specifications | Full specifications | Full specifications | Full specifications | Full specifications |
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| MSRP: $129.99 See manufacturer website for availability. |
Etymotic ER-4P MicroPro compare
