## Technical Overview: AS07008MO-R The **AS07008MO-R** is a high-quality, miniature loudspeaker manufactured by **PUI Audio**. It is specifically designed for applications where space is limited but clear sound reproduction is required. --- ### 1. Key Technical Specifications | Parameter | Value | | :--- | :--- | | **Speaker Type** | Dynamic, Permanent Magnet | | **Impedance** | 8 Ohms ± 15% @ 1000Hz | | **Power Rating (Rated/Max)** | 0.5 Watts / 0.8 Watts | | **Frequency Range** | 300 Hz ~ 20,000 Hz | | **Sound Pressure Level (SPL)** | 86 ± 3 dB @ 0.1W/0.1M | | **Diaphragm Material** | Mylar (Polyethylene Terephthalate) | | **Magnet Material** | NdFeB (Neodymium) | | **Weight** | ~2.5 Grams | --- ### 2. Physical Dimensions & Construction The AS07008MO-R is characterized by its rectangular, low-profile shape, making it ideal for handheld devices. * **Length:** 15 mm * **Width:** 11 mm * **Height (Depth):** 3.0 mm * **Housing:** Plastic frame with integrated solder pads for electrical connection. * **Mounting:** Typically mounted using adhesive gaskets or compression fit within a custom enclosure. --- ### 3. Electronic Characteristics * **Driver Technology:** It utilizes a **Neodymium (NdFeB)** magnet. Neodymium is preferred in electronics because it provides a strong magnetic field in a very small footprint, allowing for higher efficiency and sensitivity despite the small size. * **Mylar Cone:** The use of a Mylar diaphragm makes the speaker resistant to moisture and environmental humidity, which is superior to traditional paper cones for portable electronics. * **Voice Coil:** Wound for 8-ohm impedance, making it compatible with standard low-power Class-D or Class-AB audio amplifiers found in microcontrollers (like ESP32 or Arduino projects). --- ### 4. Common Applications Due to its thin profile and durable construction, this part is frequently found in: 1. **Handheld Terminals:** Scanners and POS systems. 2. **Medical Instrumentation:** Portable monitors and diagnostic tools. 3. **IoT Devices:** Smart home sensors and voice-prompted modules. 4. **Security Systems:** Control panels and alarm notification units. --- ### 5. Integration Notes When designing a PCB for the AS07008MO-R, consider the following: * **Enclosure Design:** Because this is a "raw" speaker, it requires a sealed back-cavity (acoustic chamber) to prevent sound waves from the front and back from cancelling each other out (which would result in very thin, tinny sound). * **Soldering:** Use a low-temperature soldering profile to avoid melting the plastic housing or damaging the internal voice coil leads. ---