12 Volt Tuning - The Next Generation of Subwoofers

Data Chart
Brand MA Audio
Model MA1200XL
MSRP $275.00 (street price about $175-$219)
Warranty 2 years with original receipt

Mechanical Specifications
Weight 23.25 lbs.
Rear Mounting Clearance 6.31"
Woofer Magnet Dim. (dia. X ht. in mm) 172 x 25 x 2

Voice Coil Diameter 82mm (3.25")
Voice Coil Winding Layers 2x2 (two, two-layer coils)

Measured T/S Parameters
Nominal Impedance (ohms) 8 Revc (ohms) 6.94 (both 3.47-ohm voice coils connected in series)Sd (cone area in sq. meters) 0.051

Bl (motor strength in Tesla Meters) 20.0
Vas (in liters) 59.9
Cms (micrometers per Newton) 160.9
Mms (grams) 186.1
Fs (Hz) 29.3
Qms 4.26
Qes 0.59
Qts 0.52

Power and Excursion Data
Sensitivity (2.83V/1M in dB) 86.5
Continuous Power Handling (watts RMS) 600
Peak Power Handling (watts) 1200Xmax ([coil length - gap height]/2 in mm) 14

Computer Simulation Data
Enclosure size for simulation (cubic feet)
Sealed 1: 0.75 (no fill material)
Sealed 2: 1.25 (no fill material)

-3dB (F3) at 2.83V
Sealed 1: (Qtc=1.03) 56.4Hz
Sealed 2: (Qtc=0.88) 49.2Hz

Voltage to achieve Xmax +15%
Sealed 1: 108V
Sealed 2: 87V

SPL at Xmax +15% (8.5mm)
Sealed 1: 118.0dB anechoic
Sealed 2: 116.0dB anechoi

From The Editors Of Car Audio and
Electronics