
Car audiophiles  hungering for an audiophile-grade experience in their car have good reason to  be excited about the new mid-tweeter model: FM-3.1.
Built on a sturdy vibration free wood foundation  plate featuring ES-1200iS 1” high-resolution audio tweeter in combo with ES-03   3” high-fidelity midrange. 
High-power  mid-tweet combo performing from 250Hz extending the frequency range as high as  50,000 Hz. 
Some might call  this excessive, but CDT Audio engineers knows that these ultra-high frequencies  provide the ambient details that add nuance and character to your music. With  ES-1200iS tweeter, you'll gain a fuller, truer-to-life listening experience now  mounted on a vibration free platform to avoid rattle and vibrations which is  often a problem in car audio door installations. 
          
          High-Resolution Audio Mid-High Midrange Tweeter System
            
The ES-1200iS has about double the power radiation of typical dome tweeters. This would give systems using these tweeters a better sound field. The ES-1200iS 2nd generation transparent silk dome tweeter is a price breakthrough. The ES-1200iS is more efficient than the closest competition tweeter and has a flatter response on axis. Off axis response there is no tweeter coming close in the market. Look at attached pdf file for On-Off axis response.