D3 speakers start with the same high density proprietary composite ABS frame found in our D6 convertible systems. They feature a butyl rubber surround and a graphite injected polypropylene cone for exceptionally accurate bass response.  Whether choosing a component or a coaxial system all D3 speakers utilize 1” aluminum dome tweeters.  Our D3 component systems use an outboard 18dB high pass/ 12dB low pass model specific crossover with RAF (Rear Acoustic Fill) allows an additional pair of speakers to be added without the need of another amplifier.   You won’t find a better combination of value and performance anywhere.