AS02804MR-R

Overview

The AS02804MR-R is an electromagnetic speaker manufactured by PUI Audio, Inc. It features a round shape with a 28 mm diameter and a depth of approximately 7.2 mm. The unit operates at a nominal impedance of 4 Ohms and has a power rating of 300 mW. It delivers a sound pressure level of 92 dBA at a resonant frequency of 700 Hz. The frequency range extends up to 7 kHz. The cone material is Mylar, and the magnet is Neodymium Iron Boron (NdFeB). It utilizes top porting for sound output and employs solder pad termination for board mounting.

Feature Summary

• Top ported acoustic design for directed sound output
• Compact round form factor suitable for space-constrained assemblies
• High efficiency sound pressure level relative to power consumption

Applications

• General purpose audio indication in electronic devices
• Consumer electronics requiring compact sound sources
• Industrial control panels needing audible feedback

Procurement Notes

Verify the specific termination type and mounting configuration against your PCB layout requirements before ordering. Confirm that the 4 Ohm impedance matches your driver circuit capabilities to ensure optimal performance and prevent damage. Check RoHS compliance status if required by your manufacturing standards. Ensure the operating temperature range meets your application's environmental conditions.

Selection Notes

Select this component when a compact, high-efficiency speaker is needed for general purpose applications. The 4 Ohm impedance requires consideration of amplifier compatibility. Compare the 92 dBA SPL against other models if higher volume is necessary. Evaluate the top porting direction to ensure it aligns with the enclosure acoustic path. Consider the 300 mW power handling for continuous duty cycles.

Part Context

This model belongs to PUI Audio's standard electromagnetic speaker line. It shares common materials like Mylar cones and NdFeB magnets with similar series products. The design focuses on balancing size, cost, and acoustic performance for mass-produced electronics. It represents a standard solution for basic audio signaling needs.

Replacement Considerations

Direct substitutes may include other 28mm diameter speakers with 4 Ohm impedance and similar SPL ratings. Verify mechanical dimensions and terminal placement for direct replacement. Models with different porting locations may require enclosure modifications.