These speakers are designed specifically for those looking to produce some serious sound pressure levels. Inspired by Pioneer’s history of record-breaking SPL competition, the new P.R.O. series line of speakers is constructed with the street enthusiast in mind. With an emphasis on efficiency and power handling, the P.R.O. series lineup consists of bullet tweeters, mid bass drivers, and a subwoofer that can be mixed and matched to deliver impressive output, without requiring an impressive investment.The Pioneer P.R.O. series TS-B400PRO bullet tweeters feature aluminum die-cast chassis with titanium diaphragms backed by aggressive magnets and motor assemblies to produce a wide range of crisp, loud, and clear frequencies with up to 500 watts of maximum power handling.