The **ASX03304-R** is a high-performance, miniature micro-speaker manufactured by **PUI Audio**. It belongs to their "AS" series and is specifically designed for applications where space is limited but audio clarity is essential. --- ## 1. Key Technical Specifications The following table summarizes the core electronic and physical characteristics of the ASX03304-R: | Parameter | Specification | | :--- | :--- | | **Impedance** | 4 Ohms (±15%) | | **Power Rating (Nominal)** | 3.0 Watts | | **Power Rating (Max)** | 4.0 Watts | | **Sound Pressure Level (SPL)** | 82 dB ± 3dB @ 1W/0.5M | | **Resonant Frequency (Fo)** | 350 Hz ± 20% | | **Frequency Range** | 350 Hz ~ 20,000 Hz | | **Magnet Material** | Neodymium (NdFeB) | | **Cone Material** | Paper / Cloth Surround | --- ## 2. Component Features ### A. Magnetic Structure The part utilizes a **Neodymium (NdFeB)** magnet. Neodymium is preferred in electronics because it provides a high magnetic flux density relative to its size, allowing the speaker to remain small while maintaining a high power-to-weight ratio. ### B. Material Composition * **Cone:** Typically constructed from treated paper or composite materials to provide a balance between stiffness and low mass. * **Surround:** Often uses a cloth or rubberized surround to allow for high excursion (movement) without distorting the audio signal. ### C. Connection Type The "R" in the suffix usually denotes a specific mounting or lead wire configuration. This model typically features **solder pads** or pre-attached **lead wires**, making it easy to integrate into a PCB or a specialized enclosure. --- ## 3. Typical Applications Because of its 3W power rating and compact footprint, the ASX03304-R is commonly found in: 1. **IoT Devices:** Smart home hubs and voice-activated assistants. 2. **Portable Medical Equipment:** Heart rate monitors or diagnostic tools requiring audible alarms. 3. **Industrial Handhelds:** Rugged scanners or mobile computers. 4. **Robotics:** For providing audible feedback or synthesized speech. --- ## 4. Mounting & Integration Code When integrating this part into a circuit, ensure the amplifier matches the **4-ohm impedance** to prevent overheating or clipping. Below is a conceptual example of a simple gain stage for such a speaker: ```python # Electronic Design Note: # Speaker Impedance: 4 Ohms # Target Power: 3W # Formula: P = V^2 / R => V = sqrt(P * R) # V = sqrt(3 * 4) = ~3.46V RMS required from the Audio Amp ```