The Edwards 757-8A-RS70W is a 110 cd Re-entrant Speaker/Strobe in a white housing. First, it is a voice-evacuation appliance with an integrated 110 cd strobe. Specifically, the “-RS” designates Re-entrant Speaker, “70” designates 70 V audio operation, and “-W” designates white finish.
Where the Edwards 757-8A-RS70W fits
This appliance covers voice/alarm communication in high-ambient-noise spaces. Therefore, manufacturing facilities, parking garages, gymnasiums, and warehouses are typical sites. In addition, the re-entrant horn projection improves voice intelligibility over distance. As a result, large-area voice evacuation systems achieve better speech transmission index (STI) scores.
Voice audio operation
The speaker runs on a 70 V transformer-coupled voice circuit. Therefore, designers can drive multiple speakers from a single 70 V audio amplifier circuit. Also, field taps on the speaker transformer let the installer balance acoustic output per location.
Visible notification
The integrated 110 cd strobe runs on a separate NAC, polarized and supervised. Specifically, the 110 cd output suits larger rooms and corridors per the NFPA 72 candela tables. In addition, the strobe synchronizes with other Edwards Genesis-compatible appliances on the same NAC.
Verified specifications
- Speaker audio input: 70 V transformer-coupled
- Strobe output: 110 cd
- Audio circuit type: re-entrant horn
- Color: white housing
- Series: Edwards 757 Genesis re-entrant speaker/strobe
- Field-selectable transformer taps for acoustic output
What this appliance is not
Critically, this device requires both a 70 V audio amplifier circuit AND a separately supervised 24 VDC strobe NAC. Therefore, it is not a drop-in replacement for a standard 24 VDC horn/strobe on a single two-wire NAC. Also, a 25 V audio system requires the corresponding -RS25 variant instead.
For more information, contact the Life Safety Consultants team at (888) 557-0558, or email us at: sales@lifesafetycom.com
Additional information
| Weight | 3 lbs |
|---|---|
| Dimensions | 7 × 6 × 6 in |
| Condition | New |
| Manufacturers | Edwards |
| Part Type | Horn / Strobe |
