Z9721
Key Features:
  • 4" (100mm) mounted on 6.5" x 4.7" louvered aluminum grille: 8 ohm, Voice Range, 12 watts
  • Ferrite magnet, red acrylic treated cloth cone
  • waterproof

Primary Specifications

Speakers Environment Outdoor
ROHS Compliant No

Technical Specifications

UNIT of MEASURE
Nominal Basket Diameter 4.0 / 100.0 inch / mm
Rated Impedance 8 ohms
Rated Power 12.0 Watts
Program Power 24 Watts
Frequency Range 200 - 10000 Hz
Sensitivity
(2.83 V input measured at 1 Meter)
92 dB SPL
Voice Coil Diameter 0.8 / 20.3 inch / mm
Magnet Weight 4.8 / 136 oz / gr
Transformer

Small Signal Parameters

UNIT of MEASURE
Resonant Frequency (fo) 308 Hz
D.C. Resistance (Re) 6.0 ohms
Mechanical Q (Qms) 6.6
Electrical Q (Qes) 1.85
Total Q (Qts) 1.45
Compliance Equivalent Volume (Vas) ltr
BL Product (BL) T-M
Maximum Linear Excursion (Xmax) 0.4 mm
Surface Area of Cone (Sd) cm2
Moving Mass (Mmd) g

Material Descriptions

 
Basket Stamped Steel
Terminal Size 0.205 X 0.02
Magnet Ferrite
Voice Coil Wire Copper
Voice Coil Form Aluminum
Cone Red Acrylic Treated Cloth
Cone Edge Red Acrylic Treated Cloth
Dust Cap Red Acrylic Treated Cloth
ID Description Measurements Tolerance
OD Outside Diameter 6.5 in. +/- 0.040”
CD Cutout Diameter 3.8 in. +/- 0.030”
MG Magnet Diameter 2.8 in. +/- 0.050”
HD Hole Diameter 0.2 in. +/- 0.020”
MD Mounting Diameter 5.63 in. +/- 0.020”
ID Internal Depth 1.5 in. Maximum
FT Flange Thickness 0.4 in. +/- 0.050”
NW Net Weight 600.0 g
ceramic