5 Core 6.5" Car Audio Speakers with Bullet 1000 W 4 Ohm Mid-Range Loudspeaker | Wayfair
DS18 8" Mid Range Speaker 550 Watts Max 4 Ohm Loudspeaker Car Audio PR – Pricedrightsales
Audio System EX 80 SQ EVO 3 mid-Range 8 CM Speaker 80 MM - 1 Pair | eBay
Amazon.com: Polk Audio Atrium 8 SDI Flagship Outdoor Speaker (White) - Use as Single Unit or Stereo Pair, Powerful Bass & Broad Sound Coverage, Withstands Extreme Weather & Temperature : Electronics