Earphone Comparison
| Earphones | NEW ER•4™ | hf5™ | mc5™ | mk5™ | HD•Safety™ | ETY•Kids®5 |
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| Frequency Response | 20 Hz-16 kHz | 20 Hz-15 kHz | 20 Hz-15 kHz | 20 Hz-15 kHz | 20 Hz-15 kHz | 20 Hz-15 kHz |
| Accuracy Score | 4SR (92%) | 85% | 85% | 85% | 85+% | 85+% |
| Transducers | High performance, balanced armature micro-drivers |
High-performance balanced armature driver |
High-output 8-mm neodymium moving coil driver |
High-output 6-mm neodymium moving coil driver |
Reduced-output 6-mm neodymium moving coil driver |
Reduced-output 6-mm neodymium moving coil driver |
| Noise Isolation | 35-42 dB | 35-42 dB | 35-42 dB | 35-42 dB | 35-42 dB | 35-42 dB |
| Impedance (@1 kHz) | 4SR (45 Ohms) 4XR (45 Ohms) |
16 Ohms | 16 Ohms | 32 Ohms | 300 Ohms | 300 Ohms |
| Sensitivity (@1 kHz) SPL at 0.1V |
4SR (98 dB) 4XR (98 dB) |
105 dB | 100 dB | 95 dB | 76 dB | 76 dB |
| Maximum Output (SPL) | 122 dB | 120 dB | 120 dB | 120 dB | — | — |
| Cable | 5 ft. Detachable | 4 ft. | 4 ft. | 4 ft. | 4 ft. | 4 ft. |
| User Replaceable ACCU•Filters™ | √ | √ | √ | — | — | — |
| Warranty | 2 years | 2 years | 2 years | 1 year | 1 year | 1 year |
| CUSTOM•FIT Option | √ | √ | √ | √ | √ | √ |
| Price | $349.00 NEW ER•4 Information |
$129.00 hf5 Information |
$59.00 mc5 Information |
$59.00 mk5 Information |
$59.00 HD•Safety Information |
$39.00 ETY•Kids 5 Information |
