## Analysis of the AS09008PO-R Speaker The **AS09008PO-R** is a high-performance miniature speaker manufactured by **PUI Audio**. It is designed for applications where space is limited but high-quality sound output is required. --- ### 1. Key Technical Specifications The following table summarizes the primary electrical and physical characteristics of the component: | Feature | Specification | | :--- | :--- | | **Manufacturer** | PUI Audio | | **Impedance** | 8 Ohms | | **Rated Power** | 0.5 Watts | | **Maximum Power** | 0.8 Watts | | **Sound Pressure Level (SPL)** | 84 ± 3 dB @ 0.5W/0.1M | | **Resonant Frequency (Fo)** | 650 Hz ± 20% | | **Frequency Range** | 650 Hz ~ 20,000 Hz | | **Magnet Material** | NdFeB (Neodymium) | | **Weight** | ~0.7 Grams | --- ### 2. Component Composition The "AS" prefix indicates a specific construction style, typically involving high-grade materials to ensure longevity and clarity. * **Diaphragm:** Usually made of Mylar (PET) or a similar polymer, which provides moisture resistance and durability in small form factors. * **Magnet:** Utilizes a **Neodymium** magnet. Neodymium is preferred in electronics because it provides a strong magnetic field in a very small footprint, allowing for higher efficiency. * **Frame:** Constructed from high-temperature plastic (often PPA or PPS) to withstand soldering and environmental heat. --- ### 3. Physical Dimensions This part is known for its "Pill" or "Oval" shape, which optimizes surface area in narrow enclosures: * **Length:** 9 mm * **Width:** 9 mm (Square footprint) * **Height:** 2.8 mm (Ultra-thin profile) --- ### 4. Common Applications Due to its 8-ohm impedance and small size, the AS09008PO-R is commonly found in: 1. **Handheld Medical Devices:** For audible alerts and heart rate monitoring tones. 2. **IoT Sensors:** To provide user feedback or status pings. 3. **Security Hardware:** Keypads and small alarm panels. 4. **Wearables:** Compact devices requiring basic audio feedback. --- ### 5. Integration Tips * **Polarity:** Ensure the positive (+) and negative (-) terminals are connected correctly to maintain phase, especially if using multiple speakers. * **Enclosure:** To improve the "bass" (lower frequencies) and overall volume, it is recommended to mount this speaker in a sealed back-cavity. * **Soldering:** Use caution with iron temperatures; excessive heat on the terminals can damage the internal voice coil connections. ---