Careful acoustic design and the use of advanced materials contribute to the exceptional music fidelity and speech intelligibility exhibited by the RCF MR 55 2 Way 5" Speaker (White). The shielded low-frequency driver's carbon fiber diaphragm produces a linear response and low distortion. The high-frequency section features a 110 deg. x 110 deg. constant directivity horn with a built-in mechanical phase equalizer. The horn is driven by a Ferrofluid cooled,0.75" soft dome tweeter.