The **AS02008MR-R** is a high-quality miniature speaker manufactured by **PUI Audio, Inc.** It is specifically designed for applications where space is limited but clear audio output is required. --- ### 1. Technical Specifications Below are the primary electrical and physical specifications for the AS02008MR-R: | Feature | Specification | | :--- | :--- | | **Diameter / Size** | 20mm (Circular) | | **Impedance** | 8 Ohms (±15%) | | **Power Rating (Nominal)** | 0.5 Watts | | **Power Rating (Maximum)** | 1.0 Watts | | **Frequency Range** | 500 Hz ~ 4,000 Hz | | **Sound Pressure Level (SPL)** | 82 dB @ 0.1W / 0.1M | | **Magnet Material** | NdFeB (Neodymium) | | **Mounting Type** | Surface / Flange | --- ### 2. Key Internal Components The AS02008MR-R utilizes specific materials to balance durability and performance: * **Neodymium Magnet:** Provides a high magnetic flux density in a small footprint, allowing the speaker to be thin and lightweight. * **Mylar (PET) Cone:** The diaphragm is made of Mylar, which is resistant to moisture and environmental factors, making it more durable than traditional paper cones. * **Voice Coil:** A standard copper-wound coil designed to handle up to 1W of peak power. * **Frame:** A rigid metal housing that protects the internal components and provides mounting points. --- ### 3. Common Applications Due to its small 20mm diameter, this part is commonly found in: 1. **Handheld Devices:** Radios, scanners, and portable GPS units. 2. **Security Systems:** Control panels and alarm notification beepers. 3. **Industrial Equipment:** User interface feedback (beeps/alerts) for machinery. 4. **IoT Devices:** Smart home hubs or sensors requiring voice prompts. --- ### 4. Integration Tips * **Enclosure Design:** To maximize the bass response and overall volume, it is recommended to mount this speaker in a sealed enclosure. * **Polarity:** Ensure the positive (+) and negative (-) terminals are connected correctly to maintain phase alignment, especially if using multiple speakers. * **Driving Circuit:** Can be driven directly by a small Class-D amplifier or a microcontroller with a transistor buffer (for simple tones).