Rampage 18 V4 Specifications:

	D1	D2
Sensitivity	92.3 dB	89 dB
Nominal Impedance	Dual 1 ohm	Dual 1.8 ohm
DC Resistance (DC)	1ohm	2ohm
Voice Coil Dim	4″	4″
Power Handling	4000 watts	4000 watts
Peak Dynamic Power	12000 watts	12000 watts
XMAX one way (mm)	40	40
VAS	31.8 L	39 L
FS	27.5 Hz	27.2 Hz
QES	0.45	0.38
QMS	7.32	7.25
QTS	0.42	0.36
Magnet	1100 oz	1100 oz
Displacement	17.6 L/ .62 cu. ft	17.6 L/ .62 cu. ft

Enclosure Suggestions:

D1: 

Sealed: 53 L / 1.87 Cu. ft

Ported Compact: 58 L / 2.04 cu. ft

Port Area: 36 sq inL:27.3″ / 96cm

FB: 38 Hz

Ported: 119 L / 4.2 cu. ft

Port Area:43.3 sq in : 36″ / 66cm

FB: 30 Hz

 

D2:

 

Sealed: 53 L / 1.77 Cu. ft

Ported Compact: 58 L / 2.04 cu. ft

Port Area: 36 sq inL:27.3″ / 96cm

FB: 38 Hz

Ported: 119 L / 4.2 cu. ft

Port Area:43.3 sq in : 36″ / 66cm

FB: 30 Hz