The **ASX03308-R** is a high-performance, miniature micro-speaker manufactured by **PUI Audio**. It is specifically designed for space-constrained applications that require clear audio output and high reliability. --- ### 1. Key Technical Specifications The following table summarizes the primary electrical and physical characteristics of the ASX03308-R: | Parameter | Specification | | :--- | :--- | | **Impedance** | 8 Ohms (±15%) | | **Rated Input Power** | 0.5 Watts | | **Maximum Input Power** | 0.8 Watts | | **Resonant Frequency (Fs)** | 550 Hz (±20%) | | **Frequency Range** | 550 Hz ~ 20,000 Hz | | **Sound Pressure Level (SPL)** | 84 dB @ 0.1W/0.1M | | **Magnet Material** | Neodymium (NdFeB) | | **Weight** | ~1.5 Grams | --- ### 2. Physical Construction & Design The "R" in the part number often signifies compliance with specific environmental standards or a specific revision. The physical build is optimized for modern electronics: * **Miniature Dimensions:** Usually measuring around 30mm x 20mm (or similar small footprint), making it ideal for handheld devices. * **Diaphragm:** Typically made of high-quality Mylar (PET) or cloth to ensure durability and moisture resistance. * **Spring Contacts:** Many versions of this series feature gold-plated spring contacts (pogo pin style) or solder pads for easy integration onto a PCB. --- ### 3. Application Use Cases Due to its small size and high SPL for its power rating, the ASX03308-R is commonly used in: 1. **Handheld Devices:** Scanners, GPS units, and portable medical monitors. 2. **IoT Hardware:** Smart home hubs and security panels that require voice prompts. 3. **Industrial Equipment:** Audible alarms and user feedback signals for control panels. --- ### 4. Implementation Notes (Circuit Design) When integrating this part into an electronic circuit, keep the following in mind: ```cpp // Example: Driving the ASX03308-R using a Class-D Audio Amplifier // The amplifier's output must match the 8-ohm impedance. Audio_Amp_Config { Gain: 20dB; Load_Impedance: 8_Ohms; Max_Output_Voltage: 2.0V_RMS; // To stay within 0.5W limit (P = V^2 / R) } ``` * **Enclosure Design:** To achieve the best bass response and prevent phase cancellation, this speaker should be mounted in a sealed or ported acoustic chamber. * **Filtering:** A high-pass filter (HPF) set near 500 Hz is recommended to prevent over-excursion of the diaphragm at frequencies below its resonant point.