<b>Travel in high fidelity sound – always</b><br><br>The super slim and light Philips Fidelio F1 is the ideal travel companion. Uncompromising on sound quality, smart comfort and sturdiness, it’s expertly crafted for high definition sound and steadfast superb noise isolation, wherever you go.<br><br><b>40mm high definition drivers for clear and authentic sound</b><br><br>Each speaker driver is carefully hand picked, tuned and tested before being paired to ensure the most balanced natural sound. The 40mm drivers utilize high power neodymium magnets to deliver true high definition sound in a wide dynamic range, reproducing even the most minute details.<br><br><b>Bass reflex system deliver clear, dynamic and balanced bass</b><br><br>The headphone’s acoustic closed-back architecture features a Bass Reflex System that essentially comprises ear-shells with strategically placed vents.
These regulate the air pressure within the internal chamber, providing the diaphragm with a controlled enviro This part is cataloged in the Federal Logistics Information System under NSN 4940-00-234-5683, indicating validated use in U.S. government and defense logistics supply chains.
| material | PLASTIC CASE |
| body_style | W/O MTG FACILITIES TERMINAL(S) ON ONE SURFACE |
| body_width | 0.400 INCHES MAXIMUM IN |
| body_height | 0.120 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN |
| body_length | 0.400 INCHES MINIMUM AND 0.470 INCHES MAXIMUM IN |
| terminal_length | 1.000 INCHES MINIMUM IN |
| terminal_diameter | 0.025 INCHES NOMINAL IN |
| reliability_indicator | ESTABLISHED |
| nonderated_operating_temp | -55.0 CELSIUS MINIMUM AND 125.0 CELSIUS MAXIMUM DEGC |
| terminal_surface_treatment | SOLDER |
| terminal_type_and_quantity | 2 UNINSULATED WIRE LEAD |
| specification/standard_data | 81349-MIL-C-0039001/5 GOVERNMENT SPECIFICATION |
| NSN | 4940-00-234-5683 |