18 Sound 21NLW4000 - Subwoofer 21” 8 Ohm - 1700W AES - 97dB@1W/1mt

21” Extended LF Neodymium Driver - 4” vc - 1700W AES - 97dB@1W/1mt - ISV - Active Cooling

Manual

General

• Product type Cone driver
• Brand Eighteen Sound
• Reference 21NLW4000
• Product code ALT214000WF08NA - 022218N400

Informations

• Nominal impedance 8 ohm
• Dimensional category 21 inch
• Frequency coverage type Sub, Low
• Manufacturer sensitivity 97 dB
• Calculated sensitivity 94.76 dB
• Nominal power handling 1600 W
• Max power handling 3200 W
• Bandwidth 30÷1800 Hz

Fundamental parameters

• Sd 1660 cm²
• Mms 380 gr
• Cms 80 µm/N
• Le 2.8 mH
• Re 4.9 ohm
• BL 30 T.m

Small signal parameters

• Fs 29 Hz
• Qes 0.38
• Qms 22
• Qts 0.37
• Vas 305 L
• Datas
• Xmax ±15 mm
• EBP 76 Hz
• Zmin 6 ohm
• Fs / Qts 78 Hz
• Vas * Qts² 41.76 L
• Calculated efficiency 1.88 %
• Weight ~11.6 kg

Dimensions

• Voice coil diameter 4 inch
• Outside diameter 545 mm
• Baffle cutout diameter 492 mm
• Depth 245 mm
• Front thickness 18 mm
• Depth after front 227 mm