Stetron announces the development of a new 57mm (2.25”) 520 Hz low frequency driver for UL217 applications

Buffalo, NY, Friday August 3, 2018 :  Stetron is pleased to announce the development of a 520Hz low frequency new miniature loudspeaker designed especially for the Fire Alarm and Protection Industry.

This driver is suitable for use in products intended to be compliant to UL217. This low profile driver has a small foot print of 57 mm and uses a Mylar cone which renders it water resistant. Despite its physical size, this 57mm x 17.5mm driver has a high output SPL of minimum 91.2dB measured at 1W/1m and a rated input power of 2W rms.

This driver is designed to meet all the performance requirements stipulated in section 84 of UL 217 . Another key feature of this small 520 Hz low frequency driver is its very low current consumption which makes it desirable for battery powered devices.

To learn more about this 520 Hz low frequency driver and review the specifications, please visit:


Stetron is a premier supplier of custom audio solutions to fortune 500 companies worldwide. Established in 1965, Stetron has a demonstrated expertise in optimizing engineered components including microphones (ECMs), dynamic receivers and loudspeakers. Stetron’s Asian based manufacturing coupled with North American engineering, delivers technically advanced products at competitive prices.

Stetron strives to provide the highest level of customer and technical support in the industry. We work with our partners to fully understand their audio requirements and help them design solutions that meet their requirements. Stetron maintains a full anechoic chamber and uses sophisticated software to measure a number of parameters including: THD, Life and load testing, Thiele-Small Parameters, Impedance and reliability. Stetron delivers strong technical experience and data you can trust.

Stetron maintains a global presence with offices in Toronto, Canada; New York, United States; Taipei, Taiwan; Ningbo and Foshan, China.

For questions  on any Stetron product, you can contact us at anytime via email: or by contacting Customer Service: Canada: 1-877-716-0751 U.S.A: 1-800-925-3002.

Questions? Contact Us Today!
Questions? Contact Us Today!