Professional Audio Solutions Since 1949 2.25" (57 mm) Waterproof Peaked Response Alarm Speaker
Brand Name
MISCO OEM
Part #
57RFT-8A
In stock
$18.66
- MSRP$19.14
- Buy 1 - 9$18.66
- Buy 10 - 94 $13.06
- Buy 95 - 188 $9.34
- Buy 189+Request a Quote
This all-weather, high sensitivity (106 dB), speaker is designed for use in vehicle back-up alarms or industrial alarms. Its unique design creates a high-output resonant frequency, which allows it to meet many SAE alarm standards. Its phenolic impregnated cone design helps prevent moisture absorption, especially useful in high humidity.
- Signal / Alarm Speaker
- 2.25" (57 mm) basket diameter
- 4 watts, 8 ohms, 106 dB SPL
- 0.6" copper voice coil, Kapton former
- Ferrite magnet, stamped steel basket
- Phenolic treated cloth cone & surround
Download Product Specifications (PDF) »
| Brand Name | MISCO OEM |
|---|---|
| Speaker Type | Alarm |
| Shape of Speaker | Round |
| Size, Nominal (inch & mm) | 2" (50 mm) |
| Environment | Outdoor |
| Application | Medical, Military, Signal / Alarm Systems |
| RoHS Compliant | Yes |
| Rated Impedance (Ω) | 8 |
| Rated Power IEC268-5 (W) | 4 Watts |
| Program Power (W) | 8 |
| Sensitivity (dB SPL) ¹ | 106 |
| Frequency Range (Hz) | 1250 - 13,000 |
| DC Resistance (Re) (Ω) | 6.8 |
| Resonant Frequency (Fs) (Hz) | 1300 |
| Nominal Impedance (Z) (Ω) | 8 |
| Voice Coil Inductance (Le) (mH) | 0 |
| Mechanical Q Factor (Qms) | 23.2 |
| Electrical Q Factor (Qes) | 16.3 |
| Total Q Factor (Qts) | 9.58 |
| Basket Type | Stamped steel with zinc plating |
| Terminal Size (mm) | 2.79 x 0.5 |
| Voice Coil Diameter (mm) | 15.23 |
| Voice Coil Wire Material | Copper |
| Voice Coil Former Material | Kapton |
| Magnet Material | Ferrite |
| Magnet Weight (g) | 20 |
| Cone Body Material | Black phenolic treated cloth |
| Cone Surround Material | Black phenolic treated cloth |
| Spider Material | Conex |
| Dust Cap Material | Mylar |
| Net Weight (kg) | 0.08 |
| Technical Notes | ¹ Sensitivity is measured with 2.83 volt input, measured on-axis at 1 meter distance |