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SPECIFICATION
Engineered specifically for true Sub reproduction the 18A will produce high SPL, Long excursion and a un imaginable transient responce. The 18A uses a flat wire copper clad aluminum 3” voice coil, two low “body weight” hemp spiders, a water resistant fibreglass impregnated paper cone and to finish off a custom accordion cloth surround.
Rated Impedance 8 Ohm Program Power RMS from 20Hz-120Hz: 1428 Watts Power handling capacity 1750 Watts Sensitivity 1W, 1m 95.2 dB Frequency Range 12-900 Hz Effective Piston Diameter 380 mm/inch Maximum Excursion Before Damage 65/2.5 mm/inch Minimum Impedance 6.8 Ohm Voice Coil Diameter 76/3 mm/inch Voice Coil Material CCA Voice Coil Wind height 35/ 13/8 mm/inch Number of layers 6 Surround Design Accrodian -
Theile Small
Resonance frequency Fs
23.6
DC resistance Re
6.8
Mechanical factor Qms
6.1524
Electrical factor Qes
0.46
Total factor Qts
0.49
BL factor BL
24.68
Effective Moving Mass Mms
180
Equivalent Cas air load Vas
389
Effective piston area Sd
0.1134
Max. linear excursion Xmax
.4″ 10.18mm
Voice – coil inductance @ 1KHz Le1k
5.9
Half-space efficiency Eff
0.99
Nominal Diameter 460/18
mm/inch
Rated Impedance 8
Ohm
Program Power RMS from 20Hz-120Hz: 1428
Watts
Power handling capacity 1750
Watts
Sensitivity 1W, 1m 95.2
dB
Frequency Range 12-900
Hz
Effective Piston Diameter 380
mm/inch
Maximum Excursion Before Damage 65/2.5
mm/inch
Minimum Impedance 6.8
Ohm
Voice Coil Diameter 76/3
mm/inch
Voice Coil Material CCA
Voice Coil Wind height 35/ 13/8
mm/inch
Number of layers 6
Surround Design Accrodian
