The **AS05708MR-R** is a high-quality miniature speaker manufactured by **PUI Audio**. It is specifically designed for applications where space is limited but clear audio output is required. --- ### 1. Key Specifications The following table highlights the primary technical parameters of the device: | Parameter | Value | | :--- | :--- | | **Manufacturer** | PUI Audio | | **Frame Diameter** | 57mm (approx. 2.25 inches) | | **Impedance** | 8 Ohms | | **Power Rating (Nominal)** | 3 Watts | | **Power Rating (Maximum)** | 5 Watts | | **Frequency Range** | 200 Hz ~ 20,000 Hz | | **Sound Pressure Level (SPL)** | 86 dB @ 1W / 0.5M | | **Magnet Material** | Neodymium | --- ### 2. Physical Construction The "AS" series from PUI Audio typically utilizes specific materials to balance weight and performance: * **Cone Material:** Usually treated paper or Mylar, designed for durability and moisture resistance in certain environments. * **Magnet Type:** Neodymium magnets are used to provide high magnetic flux density in a small form factor, making the speaker much lighter than those using ferrite magnets. * **Frame:** Metal frame with mounting holes for secure installation. --- ### 3. Application Use Cases Due to its 8-ohm impedance and 3W power handling, this part is commonly found in: 1. **Industrial Controls:** For audible alarms and feedback tones. 2. **Medical Devices:** Integrated into bedside monitors or diagnostic equipment. 3. **Kiosks and Point-of-Sale (POS):** Providing voice prompts for users. 4. **Consumer Electronics:** Small radio projects or DIY audio kits. --- ### 4. Integration Considerations When designing a circuit for the AS05708MR-R, keep the following in mind: * **Amplifier Matching:** Ensure your Class D or Class AB amplifier is rated for an 8-ohm load. * **Enclosure Design:** To achieve the best low-frequency response (closer to the 200 Hz limit), the speaker should be mounted in a sealed or ported enclosure to prevent acoustic short-circuiting. * **Polarity:** Note the positive (+) and negative (-) markings on the solder tabs to ensure correct phase alignment if using multiple speakers.