Z9740
Key Features:
  • 3.2" (83 mm), 8 ohm
  • Portable USB powered voice speaker, 4 watt
  • water resistant
  • connects to sound card with 1/8" stereo plug
  • Temperature rating: minus 40F(minus 40C) to +185F (+85C)

Primary Specifications

Speakers Environment Outdoor
ROHS Compliant No

Technical Specifications

UNIT of MEASURE
Nominal Basket Diameter 3.2 / 83.0 inch / mm
Rated Impedance 8 ohms
Rated Power 4.0 Watts
Program Power 8 Watts
Frequency Range 350 - 9000 Hz
Sensitivity
(2.83 V input measured at 1 Meter)
84 dB SPL
Voice Coil Diameter 0.7 / 17.8 inch / mm
Magnet Weight 0.2 / 4 oz / gr
Transformer

Small Signal Parameters

UNIT of MEASURE
Resonant Frequency (fo) 428 Hz
D.C. Resistance (Re) 6.8 ohms
Mechanical Q (Qms)
Electrical Q (Qes)
Total Q (Qts)
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 0.19 X 0.02
Magnet Neodymium
Voice Coil Wire Copper
Voice Coil Form Kapton
Cone Red Acrylic Treated Cloth
Cone Edge Red Acrylic Treated Cloth
Dust Cap Mylar
ID Description Measurements Tolerance
OD Outside Diameter 2.6 in. +/- 0.040”
CD Cutout Diameter 2.4 in. +/- 0.030”
MG Magnet Diameter 0.9 in. +/- 0.050”
HD Hole Diameter 0.3 in. +/- 0.020”
MD Mounting Diameter 3.1 in. +/- 0.020”
ID Internal Depth 0.7 in. Maximum
FT Flange Thickness 0.07 in. +/- 0.050”
NW Net Weight 39.0 g
ceramic