2-3 Weeks. 45 Day Lowest Price - 100% Satisfaction Guarantee. The MP255S is among the most affordale subwoofers in it's class. Dual 15" portable subwoofer system includes two 15" woofers. With the bandpass design,the MP255S uses two tuned chambers to shift its energy down into the low-freqency region! This Carpet covered,box will shake any dance floor!