The **AS04008PS-4W-WR-R** is a high-performance, miniature loudspeaker manufactured by **PUI Audio**. It is specifically designed for applications where space is limited but high-quality sound and durability are required. --- ### ## Technical Specifications Below is a detailed breakdown of the electronic and physical characteristics of the component: | Feature | Specification | | :--- | :--- | | **Speaker Type** | Dynamic, Permanent Magnet | | **Impedance** | 8 Ohms (±15%) | | **Power Rating** | 4.0 Watts (Nominal) / 5.0 Watts (Max) | | **Frequency Range** | 200 Hz ~ 20,000 Hz | | **Sensitivity** | 83 dB (±3dB) @ 1W/0.5m | | **Resonant Frequency (Fo)** | 450 Hz (±20%) | | **IP Rating** | IP67 (Waterproof and Dustproof) | | **Dimensions** | 40mm x 40mm x 18.5mm | --- ### ## Key Electronic Components & Materials 1. **Water-Resistant Membrane:** The "WR" in the part number signifies its water-resistant nature. It typically uses a synthetic cone material (like Mylar or treated paper) and specialized adhesives to maintain an **IP67 rating**, allowing it to be submerged in 1 meter of water for 30 minutes. 2. **Neodymium Magnet:** To achieve a high power rating (4W) in such a small form factor, it utilizes a Neodymium magnet. These magnets provide a much stronger magnetic field than traditional ferrite magnets of the same size. 3. **Voice Coil:** The internal coil is engineered to handle higher temperatures, allowing the speaker to operate at a 4W nominal power without thermal failure. 4. **Wiring and Connection:** The "R" at the end of the part number usually indicates a "RoHS" compliant design with specific lead wire configurations (often pre-terminated with a connector or tinned leads). --- ### ## Typical Applications Due to its ruggedized nature and high power-to-size ratio, this part is commonly used in: * **Outdoor Signaling:** Emergency sirens or notification systems. * **Marine Electronics:** Dashboards for boats or personal watercraft. * **Handheld Devices:** Ruggedized scanners and industrial walkie-talkies. * **Medical Equipment:** Devices requiring frequent sanitization or fluid exposure.