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<blockquote data-quote="Gearstix" data-source="post: 5515519" data-attributes="member: 589947"><img src="http://www.mach5audio.com/zen/images/spl_twelve04.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />Features*Extreme high power, high output subwoofer*Designed for SPL/SQL performance*3&quot; dual 2 Ohm high temperature voice coil*Thick pulp cone with foam surround*Solid pole*Triple stacked 8.5&quot; magnet structure*6 layer spyders*2,500 watts RMS thermal power handling*can withstand burps of up to 8,000 wattsShipping included in price(within North America)Power Handling - 1,500 watts daily usage; 2,500 watts thermalSensitivity - 90.5db (2.83 volts)Impedance - 2 + 2 OhmRecommended Box SizesSealed - N/APorted - 84 litres (3 cu. ft.) 36Hz tuningCompetition - varies with vehicle and installT/S ParametersFs = 42.9 HzRe = 3.8 OhmsQes = 0.32Qms = 2.35Qts = 0.28Mms = 258.5 gRms = 29.6 kg/sCms = 0.053 mm/NVAS = 14.1 litresSd = 433.7 cm2BL = 28.7Xmax = 17 mm</blockquote>

[QUOTE="Gearstix, post: 5515519, member: 589947"] [IMG]http://www.mach5audio.com/zen/images/spl_twelve04.jpg[/IMG] Features * Extreme high power, high output subwoofer * Designed for SPL/SQL performance * 3" dual 2 Ohm high temperature voice coil * Thick pulp cone with foam surround * Solid pole * Triple stacked 8.5" magnet structure * 6 layer spyders * 2,500 watts RMS thermal power handling * can withstand burps of up to 8,000 watts Shipping included in price (within North America) Power Handling - 1,500 watts daily usage; 2,500 watts thermal Sensitivity - 90.5db (2.83 volts) Impedance - 2 + 2 Ohm Recommended Box Sizes Sealed - N/A Ported - 84 litres (3 cu. ft.) 36Hz tuning Competition - varies with vehicle and install T/S Parameters Fs = 42.9 Hz Re = 3.8 Ohms Qes = 0.32 Qms = 2.35 Qts = 0.28 Mms = 258.5 g Rms = 29.6 kg/s Cms = 0.053 mm/N VAS = 14.1 litres Sd = 433.7 cm2 BL = 28.7 Xmax = 17 mm [/QUOTE]

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