The FRWS 4 ND is a 4 cm (1.6 inch) full-range speaker featuring a coated paper membrane and a black metal basket. It utilizes a neodymium magnet for a compact design. The speaker provides homogeneous sound quality suitable for miniature hi-fi speakers and small audio devices.
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| Rated power | 2W |
| Maximum power | 3W |
| Nominal impedance | 8Ohm |
| Frequency response (-10 dB) | 150–20000Hz |
| Mean sound pressure level | 78dB (1W/1m) |
| Net weight | 0.028kg |
| Resonance frequency | 250Hz |
| Cutout diameter | 36mm |
| RoHS | Compliant |