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i-4021ND

i-4021ND is a single 21 inch subwoofer, 100mm voice coil neodymium component. 

It can be stack and hanging, internal metal components guarantee the reliable safety of the hanging. Pre-loading horn can effectively improve the sensitivity.

i-4021ND also have active style. 

SPCES

Mode: Passive/Active                                                                

Rated Power: 600W

Component: LF1x21" (φ100mm, neo)

Impedance: 8Ω

Sensitivity: 101dB

Max. SPL: 132dB

Freq. Response: 29-350Hz

Cabinet:  Birch plywood                                                         

active mode:                                                                       

amplifier power: 1000W+500W+500W, 4Ohm. could drive 4pcs i-4000ND.