### AS05008MS-R: Electronic Specifications and Overview The **AS05008MS-R** is a high-quality miniature speaker manufactured by **PUI Audio, Inc.** It is part of their "AS" series, designed for compact electronic devices requiring clear audio output in a small form factor. --- ### 1. Key Technical Specifications Below are the primary electrical and physical characteristics of the component: | Parameter | Specification | | :--- | :--- | | **Impedance** | 8 Ohms (±15%) | | **Rated Input Power** | 0.3 Watts | | **Maximum Input Power** | 0.5 Watts | | **Frequency Range** | 500 Hz ~ 4,000 Hz | | **Sound Pressure Level (SPL)** | 86 dB ± 3dB @ 0.1W/0.1M | | **Resonant Frequency (Fo)** | 500 Hz ± 20% | | **Magnet Material** | NdFeB (Neodymium) | | **Diaphragm Material** | Mylar (PET) | --- ### 2. Physical Dimensions & Construction The speaker is designed for space-constrained applications. * **Diameter:** 50 mm * **Depth (Height):** 7.3 mm * **Weight:** ~13.5 grams * **Frame Material:** Metal (usually pressed steel) * **Termination:** Solder Pads (for manual or wave soldering) --- ### 3. Electronic Design Considerations #### Driving the Speaker Because this speaker has an 8-Ohm impedance and a low power rating (0.3W), it should be driven by a low-power audio amplifier or a specialized driver IC. * **Voltage Calculation:** At 0.3W and 8 Ohms, the rated voltage is approximately **1.55V RMS**. * **DC Blocking:** Always use a capacitor in series (AC coupling) if the driving signal has a DC offset to prevent voice coil burnout. #### Environmental Durability The use of a **Mylar (PET) cone** makes this speaker relatively resistant to moisture and humidity compared to traditional paper-cone speakers, making it suitable for handheld outdoor devices or industrial interfaces. --- ### 4. Typical Applications * Handheld scanners and instruments. * Alarm systems and security panels. * Medical monitoring equipment. * User interface "beeps" and voice prompts in appliances. ---