Bumper X Series Car Audio Speakers - (1248 X)

The 1248 X is designed in both 4 ohm and 8 ohm to provide a rich sound for both use in home audio and custom sound designs in car audio. It has a double pressed heavy foam surround on a rigid and strong cone body, vented pole piece, 6 windows heavy frame and is built to withstand long hours of play.

SPEAKER MODEL:	1248 X
Diameter size in inches:	12
Diameter size in centimeters:	30.48
Z - Nominal Impedance in Ohms	4
Fs = Free air resonance frequesncy in Hz:	36.9
Qts = Total Q Factor of driver:	0.57
Vas = Equivalent acoustic volume in cubic feet:	3.4
Vas = Equivalent acoustic volume in liters:	95.55
Xmax = peak linear displacement of cone in inches:	0.17
Xmax = peak linear displacement of cone in mm:	4.32
Pe = Max power in watts:	420
Ref = Driver's SPL 1W at 1m in dB:	90.6
SPL = The half-space ref. Efficiency:	90.7
Voice Coil Diameter in inches	2.0
Mounting Depth in inches:	4 1/2
Sd = Piston Area in sq. m	0.047
BL = T*M Flux Density, Length Product	8.99
no = The half-space ref. effciency:	0.007
Cms = Mechanical suspen. compliance:	305.909
Mms = Mech. mass of cone & free air load:	60.623
Qms = Mechanical Q factor of driver:	6.089
Qes = Electrical Q factor of driver:	0.6336
Revc = DC Voice coil resistance in Ohms:	3.64
Zmax = imped. At top of resonance curve in Ohms:	38.621
Fo = Free air resonance frequency in Hz:	36.900
Magnet Assembly weight (oz):	106.4
Frequency response range tested from 20-2000 Hz:	20-3700
BOXES FOR 1 SPEAKER APPLICATION RECOMMENDED ENCLOSURES FOR SEALED BOXES (WOOD IS 3/4').
Enclosure size (cubic feet) Outside volume (Vb)	1.00
Enclosure size (liters) Outside volume	28.32
Resonant frequency Hz (Fc)	77.16
Cutoff frequency Hz (F3)	56.89
BOXES FOR 1 SPEAKER APPLICATION RECOMMENDED ENCLOSURES FOR PORTED BOXES (WOOD IS 3/4').
Enclosure size (cubic feet) Outside volume (Vb)	1.5
Enclosure size (liters) Outside volume	42.48
Number of ports on the front of a box	1
Port size (inches)	4x8.13
Turning frequency Hz (Fb)	45.00
Cutoff frequency Hz (F3)	52.71

   

List price $179.94

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