57RF04M-1
Key Features:
  • 2.2" (57mm), 4 ohm
  • Voice Range, 3 watts
  • Ferrite magnet, Mylar cone
  • 86 dB @ 1 watt / 1 meter

Primary Specifications

Speakers Environment Outdoor
ROHS Compliant Yes

Technical Specifications

UNIT of MEASURE
Nominal Basket Diameter 2.2 / 57.0 inch / mm
Rated Impedance 4 ohms
Rated Power 3.0 Watts
Program Power 6 Watts
Frequency Range 600 - 19000 Hz
Sensitivity
(2.83 V input measured at 1 Meter)
89 dB SPL
Voice Coil Diameter 0.6 / 15.2 inch / mm
Magnet Weight 1.7 / 48 oz / gr
Transformer

Small Signal Parameters

UNIT of MEASURE
Resonant Frequency (fo) 600 Hz
D.C. Resistance (Re) 5.0 ohms
Mechanical Q (Qms) 7.8
Electrical Q (Qes) 3.41
Total Q (Qts) 2.37
Compliance Equivalent Volume (Vas) ltr
BL Product (BL) T-M
Maximum Linear Excursion (Xmax) mm
Surface Area of Cone (Sd) cm2
Moving Mass (Mmd) g

Material Descriptions

 
Basket Stamped Steel
Terminal Size 0.12 X 0.02
Magnet Ferrite
Voice Coil Wire Copper
Voice Coil Form Paper
Cone Mylar
Cone Edge Mylar
Dust Cap Mylar
http://s3.amazonaws.com/misco/curves/57RF04M-1.JPG?1345609673
ID Description Measurements Tolerance
OD Outside Diameter 2.3 in. +/- 0.040”
CD Cutout Diameter 2.0 in. +/- 0.030”
MG Magnet Diameter 1.8 in. +/- 0.050”
HD Hole Diameter +/- 0.020”
MD Mounting Diameter +/- 0.020”
ID Internal Depth 0.8 in. Maximum
FT Flange Thickness 0.1 in. +/- 0.050”
NW Net Weight 114.0 g
ceramic