The **ASE02506MS-LW90-DSM-R** is a high-performance miniature speaker manufactured by **PUI Audio**. It is part of their "Advanced Slim" series, designed for compact electronic devices requiring clear voice and music reproduction. --- ## 1. Component Overview This component is a **Micro Dynamic Speaker** utilizing a permanent magnet and a moving coil to produce sound. The "LW90" suffix typically refers to the **Lead Wire** length (90mm), and "DSM" indicates a **Double-Sided Mylar** or specific diaphragm construction. | Parameter | Specification | | :--- | :--- | | **Manufacturer** | PUI Audio | | **Speaker Type** | Dynamic (Moving Coil) | | **Impedance** | 6 Ohms (±15%) | | **Rated Power** | 0.8 Watts | | **Max Power** | 1.0 Watts | | **Sound Pressure Level (SPL)** | ~88 dB @ 0.1W/0.1m | | **Resonant Frequency (Fo)** | ~850 Hz | | **Dimensions** | 25mm x 9mm (Slim Profile) | --- ## 2. Key Electronic Features ### A. Impedance and Power Handling * **6-Ohm Impedance:** This is a slightly non-standard impedance (common speakers are 4 or 8 ohms). It allows for efficient power delivery from small Class-D amplifiers common in mobile devices. * **0.8W Rating:** Designed to handle continuous audio signals without thermal failure, making it louder than standard 0.25W or 0.5W micro-speakers. ### B. Acoustic Performance * **Frequency Range:** Typically covers **500 Hz to 20 kHz**. Because of its small size, it lacks deep bass but excels in the "speech" frequency range (1 kHz – 5 kHz). * **Diaphragm Material:** Uses a high-quality polymer (PEI or Mylar) which provides durability and resistance to moisture compared to paper cones. ### C. Physical Integration * **Lead Wires:** Comes pre-terminated with 90mm wires, eliminating the need for delicate soldering directly onto the speaker frame, which reduces the risk of heat damage to the voice coil. * **Slim Design:** Specifically engineered for "tight-fit" enclosures like medical handhelds, IoT sensors, or slim consumer electronics. --- ## 3. Recommended Application Circuit To drive this speaker safely, a **Class-D Audio Amplifier** is recommended to maximize battery life and minimize heat. ```mermaid graph LR A[Microcontroller/DAC] --> B[Class-D Amp] B --> C[Coupling Capacitor] C --> D[ASE02506MS Speaker] D --> E[Ground] ``` --- ## 4. Usage Considerations * **Enclosure Design:** To achieve the best sound, this speaker must be mounted in a sealed back-cavity. Without an enclosure, the front and back sound waves cancel each other out (acoustic short circuit), resulting in very thin sound. * **Polarity:** Note the wire colors (usually Red for + and Black for -). Incorrect polarity in a multi-speaker setup will cause phase cancellation.