Card Type Speaker Card Type Speakers WM-R30B WM-R57A [ Features WM-R30B WM-R57A ] Ultra-thin, ultra-light design using a piezo ceramic diaphragm. WM- - -R30B: 1.5mm thick, weight 1 gram WM-R57A: 2.0mm thick, weight 5 grams ] Outstanding broad-spectrum audio reproduction made possible by the two-way mechanical structure of the divided diaphragm, combining one large speaker for low-frequency sounds with four small speakers for high-frequency sounds. WM-R30B: 400Hz~100kHz WM-R57A: 150Hz~100kHz ] Newly developed double construction damper andhighpolymer material minimize distortion, ensuring superior reproduction. ] Because no coil or magnet is used, there is no leakage of electromagnetic radiation to interfere with magnetic media. ] The vibrating membrane is covered completely with a high polymer coating, to protect against dampness, dust, and corro- sion. [ Applications ] Mobile Communications Notebook PCs, PDAs, etc. ] AV Equipment Portable radios, Camcorders, DVD players, LCD display TVs, etc. ] Home Electronics Intercoms, Cordless telephones, Fax machine, etc. Ultra-thin and ultra-light, these new card type speakers deliver a wide frequency range of high-quality sound. These amazing new Card Type Speakers from * Panasonic are only 1/5th the thickness of dynamic speakers. Based on newly developed, original technology, they deliver top-quality, low-distortion reproduction across a wide frequency sound. So small and light, they are ideal for applications that range from notebook PCs, PDAs, and other mobile communications to AV equipment and home electronics. *comparing the WM-R57A with dynamic speaker which has the same dimensions. Design and speciÞ cations are subject to change without notice. Ask factory for technical speciÞ cations before purchase and/or use. Whenever a doubt about safety arises from this product, please contact us immediately for technical consultation. Card Type Speaker Product Construction Unit: mm WM-R30B WM-R57A 56 30 52 2.2 28 4-R1.1 1 Divided Diaphragm The speaker membrane is divided into four areas that can vibrate independently. ensuring clear reproduction in the mid-to-high frequency range. 2 Light-weight Resin Frame 3 Double Construction Damper A unique dual-layer structure connects the frame and diaphragm. 4 High Polymer Material Use of high polymer materials gives edges outstanding flexibility. ( 3 4 ) allowing reproduction of lower-frequency sounds, flattening harmonics, and minimizing distortion . 5 Piezo Ceramic The diaphragm is a unique, new design using a piezo ceramic material. ensuring clear reproduction in both low and high frequency ranges. an ultra-thin and ultra-light designed card type speaker. Typical Frequency Response Curve WM-R57A WM-R30B dBSPL dBSPL 110 110 90 90 70 70 50 50 30 30 10 10 100 1,000 10,000 100 1,000 10,000 Frequency [Hz] Frequency [Hz] Specifications Type Card Type Speakers Model No. WM-R30B WM-R57A Dimensions (H x W) 30.0 x 30.0 mm 57.5 x 56.0 mm Depth 1.5 mm 2.0 mm Weight (approx.) 1.0 g 5.0 g Sound Pressure Level 70 dB 70 dB (distance of mic and speaker) 0.3 m 0.5 m (average at 4-point) 3V RMS input 3V RMS input Frequency Response 400 Hz ~ 100 kHz 150 Hz ~ 100 kHz Design and speciÞ cations are subject to change without notice. Ask factory for technical speciÞ cations before purchase and/or use. Whenever a doubt about safety arises from this product, please contact us immediately for technical consultation. 30 21 (1.5) 4-2.2 (2.0) 57.5 40