Product Categories

Bumper X Series Car Audio Speakers - (1248 X)

Bumper X Series Car Audio Speakers
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