- 2,5" Inside-Outside voice coil
- Water resistant fibre doped cone
- Polycotton M-roll surround
- High power magnetic structure
Edge wound voice coils – ensuring the best linear frequency response and maximum SPL output
The CD850 large format compression driver delivers one of the key advantages of the HDL 20-A, the 3” voice coil allows a crossover point of 800Hz and therefore almost all of the vocal range can be produced by this driver. This allows better coverage and dispersion control, and superior efficiency.
RCF has developed an oxygen free process of moulding pure titanium ultra thin films in high quality, finely controlled shaped diaphragms. Our process offers superior sonic quality, extended to the highest audible frequencies which guarantee consistent power handling and reliability.
RCF has developed a unique voice coil, combining the advantages of inside/outside technology to the superior quality of polyimide-imide materials (wire resins and former resins). The inside/outside coil offers many advantages: - the dissipation surface is doubled - the adhesion area to the former is doubled - during thermal expansion the former is squeezed between inside and outside layers offering the best mechanical resistance.
The custom designed waveguide allows a precise coverage of 100 x 15 degrees, whilst also delivering a superb,linear high frequency response.
Thanks to the large format compression driver on a wave-guide, the HDL 20-A offers superior intelligibility over distance
The RCF HDL will maintain its intelligibility, definition and signal strength while competitors' models will attenuate and break up before the sound reaches its throw distance.