18-Inch Woofer w/Foam-Surround Cone
(400-1309)                  Specifications            Faxback Doc. # 14026

Nominal Impedance:..................................................8 Ohms
DC Resistance (Re):..............................................6.83 Ohms
Free Air Response:.................................................16.5 Hz
Equivalent Air Volume (VAS):........................................41 Ft.
Moving Mass (Mms):.............................................192.6 Grams
Mechanical Q (QMS):..................................................1.986
Electrical Q (QES):..................................................0.225
Total Q (QTS):........................................................0.20
Peak Power Handling Capacity:....................................200 Watts
Peak-to-Peak Linear Excursion (Xd):......................1/4 Inch (6.1 mm)
Gap Flux Density (Bg):..........................7850 Gauss (+/- 200 Gauss)


Sealed System

Qts..........0.200;  Fs..........18.00 Hz; Vas..........0.1893 cubic meter
Butterworth:  Vab..3.4548 Ft cubed;  F(-3)...65.9064 Hz;  Peak...0.0000 dB
Enhanced Q:   Vab..1.6590 Ft cubed;  F(-3)...72.8439 Hz;  Peak...1.2494 dB
Bessel:       Vab..5.4088 Ft cubed;  F(-3)...68.1251 Hz;  Peak...0.0000 dB


Vented System

Qts..........0.200;  Fs..........18.00 Hz; Vas..........1.1960 cubic meter
Quasi 3rd Butterworth:
     Vab...4.7970 Ft cubed;  Fb...33.3862 Hz;  F(-3)...44.5313 Hz;
     Peak...0.0000 dB
Extended Bass Shelf/BW:
     Vab...17.0967 Ft cubed;  Fb...18.0000 Hz;  F(-3)...71.6251 Hz;
     Peak...0.0000 dB
Sub-Chebyshev/Bessel:
     Vab...8.7994 Ft cubed;  Fb...18.0532 Hz;  F(-3)...65.3439 Hz;
     Peak...0.0000 dB


Specifications are typical; individual units might vary.  Specifications
are subject to change without notice.


(ALL/ir-03/22/96)