4 pcs 18 Sound 18NLW9601 18" 3600 Watts Neodymium Subwoofer 8-Ohm Pro Audio Speaker

18Sound 18NLW9601 18" 3600W Neodymium Subwoofer 8-Ohm

• Fs: 39 Hz
• Qts: 0.28
• Vas: 120 L
• Sd: 1130 cm²
• Xmax: ± 14 mm

Specifications

Resonant frequency

• Fs

• 39

• Hz

Surface of the diaphragm

• Sd

• 1130

• cm²

Effective diaphragm diameter

• Ø

• 37.9

• cm

DC resistance

• Re

• 4.7

  Minimum impedance

• Zmin

• 6.1

  Mechanical Q

• Qms

• 5.70

  Electrical Q

• Qes

• 0.30

  Total Q factor

• Qts

• 0.28

  Efficiency bandwidth product

• EBP

• 130

  Suspension equivalent air volume

• Vas

• 120

• litres

Suspension mechanical compliance

• Cms

• 66

• µm/N

Moving mass

• Mmd

• 233.1

• g

Moving mass (including airload)

• Mms

• 255

• g

Mechanical resistance

• Rms

• 11

• N·s/m

Force factor

• BL

• 31

• T·m

Voice coil inductance

• Le

• 2.19

• mH

Maximum linear excursion

• Xmax

• ± 14

• mm

Excursion limit

• Xlim

• ± 35

• mm

Displacement volume at Xmax

• Vd

• 1582

• cm³

Efficiency  

• 2.32

• %