ROC12W-8B
Key Features:
  • 12" (315mm), 6 mounting holes, 8 ohm
  • Woofer, 75 watts
  • Ferrite magnet, black talc filled polypropylene cone
  • Santoprene rubber surround
  • ROHS compliant

Primary Specifications

Speakers Environment Indoor
ROHS Compliant Yes

Technical Specifications

UNIT of MEASURE
Nominal Basket Diameter 12.0 / 304.0 inch / mm
Rated Impedance 8 ohms
Rated Power 75.0 Watts
Program Power 150 Watts
Frequency Range 25 - 1000 Hz
Sensitivity
(2.83 V input measured at 1 Meter)
88 dB SPL
Voice Coil Diameter 2.0 / 50.8 inch / mm
Magnet Weight 40.0 / 1136 oz / gr
Transformer

Small Signal Parameters

UNIT of MEASURE
Resonant Frequency (fo) 24 Hz
D.C. Resistance (Re) 6.6 ohms
Mechanical Q (Qms) 8.8
Electrical Q (Qes) 0.36
Total Q (Qts) 0.35
Compliance Equivalent Volume (Vas) 188.7 ltr
BL Product (BL) 16.1 T-M
Maximum Linear Excursion (Xmax) 6.6 mm
Surface Area of Cone (Sd) 531.0 cm2
Moving Mass (Mmd) g

Material Descriptions

 
Basket Stamped Steel, Powder Coat Black
Terminal Size 0.110 X 0.02
Magnet Ferrite
Voice Coil Wire Copper
Voice Coil Form Kapton
Cone Black Talc Filled Polypropylene
Cone Edge Santoprene Rubber
Dust Cap Plastic
http://s3.amazonaws.com/misco/curves/ROC12W-8B.JPG?1345610821
ID Description Measurements Tolerance
OD Outside Diameter 12.5 in. +/- 0.040”
CD Cutout Diameter 11.0 in. +/- 0.030”
MG Magnet Diameter 4.5 in. +/- 0.050”
HD Hole Diameter 0.2 in. +/- 0.020”
MD Mounting Diameter 12.0 in. +/- 0.020”
ID Internal Depth 5.2 in. Maximum
FT Flange Thickness 0.1 in. +/- 0.050”
NW Net Weight 4088.0 g
ceramic