The **AST-01532MR-R** is a high-performance, miniature dynamic speaker manufactured by **PUI Audio**. It is specifically designed for applications where space is limited but high-quality sound reproduction is required. --- ## 1. Component Specifications The following table summarizes the key technical characteristics of the AST-01532MR-R: | Parameter | Specification | | :--- | :--- | | **Type** | Dynamic Speaker (Moving Coil) | | **Impedance** | 8 Ohms (±15%) | | **Rated Input Power** | 0.3 Watts | | **Maximum Input Power** | 0.5 Watts | | **Frequency Range** | 600 Hz ~ 20,000 Hz | | **Sound Pressure Level (SPL)** | 85 dB ± 3dB @ 0.1W/0.1M | | **Size** | 15mm Diameter x 3.7mm Height | | **Mounting Type** | Surface Mount / Wire Lead Compatible | --- ## 2. Key Electronic Features * **Magnet Material:** It utilizes **Neodymium (NdFeB)** magnets. This allows the speaker to maintain a high magnetic flux density in a tiny form factor, resulting in higher sensitivity and better efficiency. * **Diaphragm Material:** Usually constructed from **Mylar (PET)**, which provides durability against moisture and environmental factors while maintaining a lightweight profile for high-frequency response. * **Polarity:** Standard polarity is maintained; a positive voltage applied to the terminal marked with a (+) or a red dot will move the diaphragm forward. --- ## 3. Design and Application Considerations ### Implementation Tips: 1. **Enclosure Design:** To achieve the best bass response (lower end of the 600Hz range), the speaker should be mounted in a sealed or ported enclosure to prevent "acoustic short-circuiting" (where front and back sound waves cancel each other out). 2. **Driving Circuit:** Since the rated power is 0.3W, ensure your amplifier (e.g., a Class-D audio amp) has current-limiting or gain control to prevent over-driving the voice coil, which can lead to thermal failure. 3. **Environmental Rating:** This part is often chosen for handheld electronics because it is relatively robust, though care should be taken with soldering temperatures to avoid de-magnetizing the Neodymium core. ### Common Uses: * Handheld medical devices. * Portable scanners and POS terminals. * IoT devices and smart sensors. * Consumer electronics (tablets or thin laptops).