70RA08
Key Features:
  • 2.7" (70mm), 8 ohm
  • Voice Range, 500 milliwatts
  • Alnico magnet, paper cone;

Primary Specifications

Speakers Environment Indoor
ROHS Compliant No

Technical Specifications

UNIT of MEASURE
Nominal Basket Diameter 2.7 / 70.0 inch / mm
Rated Impedance 8 ohms
Rated Power 0.0 Watts
Program Power 1 Watts
Frequency Range 280 - 3200 Hz
Sensitivity
(2.83 V input measured at 1 Meter)
85 dB SPL
Voice Coil Diameter 0.6 / 15.2 inch / mm
Magnet Weight 0.4 / 10 oz / gr
Transformer

Small Signal Parameters

UNIT of MEASURE
Resonant Frequency (fo) 280 Hz
D.C. Resistance (Re) 7.4 ohms
Mechanical Q (Qms) 5.5
Electrical Q (Qes) 7.74
Total Q (Qts) 3.21
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 .12 X .02
Magnet Alnico
Voice Coil Wire Copper
Voice Coil Form Paper
Cone Paper
Cone Edge Paper
Dust Cap Paper
http://s3.amazonaws.com/misco/curves/70RA08.JPG?1345609708
ID Description Measurements Tolerance
OD Outside Diameter 2.8 in. +/- 0.040”
CD Cutout Diameter 2.5 in. +/- 0.030”
MG Magnet Diameter 0.87 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 47.0 g
neodymium