18 Sound 21Id - Subwoofer 21” 2 Ohm - 1800W AES - 98dB@1W/1mt

21” IPAL™ optimized neo subwoofer - 5.3” vc - 1800W AES - 98dB@1W/1mt - ISV - DSS - SDR

Manual

General

• Product type Cone driver
• Brand Eighteen Sound
• Reference 21iD
• Product code ALT2100IDWF02NA - 022212N0K0

Informations

• Nominal impedance 2 ohm
• Dimensional category 21 inch
• Frequency coverage type Sub, Low
• Manufacturer sensitivity 94.2 dB
• Calculated sensitivity 96.99 dB
• Nominal power handling 1800 W
• Max power handling 3600 W
• Bandwidth 29÷1600 Hz
• Fundamental parameters
• Mms 489 gr
• Cms 36 µm/N
• Le 1.08 mH
• Re 1.3 ohm
• BL 25.2 T.m

Small signal parameters

• Fs 38 Hz
• Qes 0.24
• Qms 5.6
• Qts 0.23
• Vas 143 L
• Datas
• Xmax ±14 mm
• EBP 158 Hz
• Zmin 2 ohm
• Fs / Qts 165 Hz
• Vas * Qts² 7.57 L
• Calculated efficiency 3.14 %
• Weight ~13.6 kg

Dimensions

• Voice coil diameter 5.3" inch
• Outside diameter 545 mm
• Baffle cutout diameter 492 mm
• Depth 250 mm
• Front thickness 18 mm
• Depth after front 232 mm
• Shape & Materials
• Front chape Cylindrical
• Magnet type Neodymium