The **AS09008PO-2-WR-R** is a high-performance, water-resistant micro speaker manufactured by **PUI Audio**. It is part of their "AS" series, designed for applications where space is limited but high sound pressure levels and environmental durability are required. --- ### 1. Key Specifications Below are the primary electronic and physical characteristics of the component: | Feature | Specification | | :--- | :--- | | **Speaker Type** | Dynamic, Permanent Magnet | | **Impedance** | 8 Ohms ± 15% | | **Rated Input Power** | 1.0 Watt | | **Maximum Input Power** | 1.2 Watts | | **Resonant Frequency (Fo)** | 500 Hz ± 20% | | **Sound Pressure Level (SPL)** | 82 dB ± 3dB @ 0.1W/0.1M | | **Frequency Range** | 500 Hz ~ 20,000 Hz | | **IP Rating** | IP65 (Dust tight, water splash resistant) | --- ### 2. Physical Construction The part number suffix provides clues about its physical build: * **Form Factor:** Rectangular shape measuring approximately 9mm x 9mm. * **Diaphragm:** Typically made of PEEK (Polyether ether ketone) or similar high-durability polymers to maintain acoustic integrity while resisting moisture. * **Connection Type:** The "WR" in the suffix usually denotes **Wire Leads**. This means the speaker comes with pre-soldered wires for easy integration into a housing, rather than surface-mount pads. * **Magnets:** Utilizes high-energy Neodymium (NdFeB) magnets to achieve high output from a tiny footprint. --- ### 3. Critical Design Considerations When integrating the AS09008PO-2-WR-R into an electronic circuit, consider the following: #### A. Driving the Speaker Because it is an 8-ohm speaker, it can be driven by standard Class D or Class AB audio amplifiers. Ensure the amplifier's output does not exceed the **1.2W peak power** to prevent voice coil burnout. #### B. Polarity The wire leads are typically color-coded (Red for Positive, Black for Negative). Correct polarity is essential in multi-speaker setups to ensure the speakers are "in phase," preventing acoustic cancellation. #### C. Environmental Sealing While the speaker itself is **IP65 rated**, the integration into the device enclosure must be handled carefully. To maintain the water resistance, a gasket or adhesive seal must be used around the front face of the speaker frame. --- ### 4. Common Applications * **Handheld Devices:** Radios, scanners, and GPS units. * **IoT Hardware:** Smart doorbells and outdoor sensors. * **Medical Instruments:** Portable monitors that require audible alerts and may be exposed to liquids. * **Wearables:** Specialized industrial wearable tech.