AT-40

Overview

The AT-40 is a general-purpose cylindrical speaker manufactured by PUI Audio, Inc. It features a nominal impedance of 100 Ohms and a rated power handling capacity of 150 mW. The device operates within a frequency range of 500 Hz to 20 kHz. Physical dimensions include a maximum seated height of 12.50 mm (0.492 inches). Acoustic performance specifications list sound pressure levels between 73 dB and 80 dB.

Feature Summary

• Cylindrical form factor designed for top port mounting applications
• General-purpose audio reproduction capability across mid-to-high frequencies
• Robust construction suitable for standard electronic enclosure integration

Applications

• Consumer electronics audio output
• Industrial control panel indicators
• Medical device acoustic signaling

Procurement Notes

Verify the specific acoustic rating required for your application, as public sources cite both 73 dB and 80 dB sensitivity values for this part number. Confirm mechanical fitment against the 12.50 mm maximum height constraint. Ensure the 100 Ohm impedance matches your amplifier or driver circuit design. Check RoHS compliance status with the manufacturer before finalizing procurement.

Selection Notes

Select this component when a compact, high-impedance speaker is needed for low-power applications. The 100 Ohm impedance reduces current draw compared to standard 8 Ohm speakers. Consider the 500 Hz lower frequency limit; it is unsuitable for deep bass reproduction. Evaluate the 150 mW power rating against your system's voltage and duty cycle requirements to prevent thermal damage.

Part Context

This model belongs to PUI Audio's line of general-purpose cylindrical speakers. It serves as an alternative to lower impedance counterparts in battery-operated devices where current efficiency is prioritized over raw volume. The product is categorized under standard electro-acoustic transducers used for voice and tone generation rather than high-fidelity music playback.

Replacement Considerations

Substitutes must match the 100 Ohm impedance and 150 mW power rating. Verify that replacement models support the same 12.50 mm height restriction. Ensure the new component maintains compatibility with the intended mounting style and frequency response characteristics.