Model # 31RN12-3

31RN12-3
Key Features:
  • 1.2" (31mm), 12 ohm
  • Full Range, 1 watt
  • Neodymium magnet, aluminum black anodized cone
  • RoHS compliant;
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Product Specifications & Parameters

Primary Specifications

Speakers Environment Indoor
ROHS Compliant Yes

Technical Specifications

UNIT of MEASURE
Nominal Basket Diameter 1.2 / 31.0 inch / mm
Rated Impedance 12 ohms
Rated Power 1.0 Watts
Program Power 2 Watts
Frequency Range 250 - 20000 Hz
Sensitivity
(2.83 V input measured at 1 Meter) 		78 dB SPL
Voice Coil Diameter 0.7 / 17.8 inch / mm
Magnet Weight 0.3 / 8 oz / gr
Transformer

Small Signal Parameters

UNIT of MEASURE
Resonant Frequency (fo) 250 Hz
D.C. Resistance (Re) 12.1 ohms
Mechanical Q (Qms) 4.7
Electrical Q (Qes) 0.85
Total Q (Qts) 0.72
Compliance Equivalent Volume (Vas) 0.0 ltr
BL Product (BL) 3.0 T-M
Maximum Linear Excursion (Xmax) mm
Surface Area of Cone (Sd) 5.0 cm2
Moving Mass (Mmd) g

Material Descriptions

 
Basket Stamped Steel
Terminal Size .140 X .02
Magnet Neodymium
Voice Coil Wire Copper
Voice Coil Form Paper
Cone Aluminum Black Anodized
Cone Edge Polyether Foam
Dust Cap Aluminum

Sensitivity / Frequency

http://s3.amazonaws.com/misco/curves/31RN12-3.JPG

Drawing

ID Description Measurements Tolerance
OD Outside Diameter 1.2 in. +/- 0.040”
CD Cutout Diameter 1.1 in. +/- 0.030”
MG Magnet Diameter 1.0 in. +/- 0.050”
HD Hole Diameter +/- 0.020”
MD Mounting Diameter +/- 0.020”
ID Internal Depth 0.5 in. Maximum
FT Flange Thickness 0.1 in. +/- 0.050”
NW Net Weight 30.0 g
neodymium