Walmart offers the Boss Audio Chaos Extreme 6.5" 250-watt 2-Way Car Speaker Pair, model no. CH6520, for $13.43. Opt for in-store pickup to avoid the $4.97 shipping charge. That's the lowest price we could find by $2. They feature a frequency response of 100-Hz to 18-kHz, 4-ohm impedance, 1" tweeter, and a 1" aluminum coil.