The **AS05708PR-4-R** is a high-quality miniature loudspeaker manufactured by **PUI Audio**. It is specifically designed for applications where space is limited but clear audio output is required. --- ### 1. Key Technical Specifications The following table outlines the core electronic and physical characteristics of the component: | Feature | Specification | | :--- | :--- | | **Impedance** | 8 Ohms (±15%) | | **Rated Power** | 3.0 Watts | | **Maximum Power** | 4.0 Watts | | **Frequency Range** | 200 Hz ~ 20,000 Hz | | **Sensitivity (SPL)** | 84 dB @ 1W / 0.5M | | **Resonant Frequency** | 450 Hz (±20%) | | **Magnet Material** | NdFeB (Neodymium) | | **Cone Material** | Paper with Cloth Surround | --- ### 2. Functional Breakdown #### A. Neodymium Magnet System The part uses a **Neodymium (NdFeB)** magnet. This material is highly efficient, allowing the speaker to be much smaller and lighter than traditional ferrite-magnet speakers while maintaining a high magnetic flux density. This results in better control over the voice coil and higher sensitivity. #### B. Frequency Response With a range starting at **200 Hz**, this speaker is categorized as a "full-range" miniature driver. While it lacks deep sub-bass, it covers the entire human vocal range and high-frequency musical notes effectively, making it ideal for voice prompts and alarms. #### C. Power Handling At **3 Watts rated power**, it can handle significantly more energy than standard 0.5W or 1W PCB-mount speakers. This allows for higher volume levels without distorting the audio signal. --- ### 3. Physical Dimensions & Mounting * **Form Factor:** Square * **Width/Length:** 57mm x 57mm * **Depth:** 25.5mm * **Termination:** Solder Pads (typically used with wire leads) --- ### 4. Common Applications * **Industrial Equipment:** Audible alerts and status indicators. * **Kiosks:** Voice guidance for users. * **Medical Devices:** Monitoring alarms and patient interaction systems. * **IoT Devices:** Smart home hubs and intercoms. ---