Mwave offers the Boss 5.25" 300-watt 4-Way Phantom Series Car Speakers
, model no. P554c, for $27.88
with free shipping
. That's the lowest total price we could find by $2. Each speaker features 150 watts of RMS power, an 85Hz to 20kHz frequency response, 1.25" Mylar cone midrange, two 0.5" Piezo tweeters, electroplated injection-molded polypropylene cone, buytl rubber surround, and diecast aluminum frame.