Yeah, I have the Shaker Pro and the upgrade option cost was $1200.00. For the $1200.00 I got a trunk mounted sub and a bump in wattage to 550. It sounds okay I guess, but the Shaker 500 in my 07 put out nearly 500 watts and the door subs had much more thump at low volume. However, the Shaker Pro with its component door speakers (separate tweeter/midrange) sounds clearer with much higher elevated treble. All in all I'm happy with it, but still shaking my head in disbelief at that $1200.00 option cost.....WOW!!
2014 Mustang GT Coupe Premium. Options include: California Special package, comfort package, navigation, glass roof, shaker pro system, 3.73 ratio limited slip axle, GT front grill/fogs, MGW race spec shifter, BBK X-Pipe, Corsa GT500 Quad Sport axle-back, Ford Racing ProCal tune. "If I wanted insane HP, I would have purchased a 2014 Shelby GT500!"