Jamo R 909 Sound Catalogue - 2011 - English - Page 60

WaveGuide WaveGuide is the unique way Jamo has shaped the tweeter's faceplate. The result is a controlled sound pattern with a more open and dynamic reproduction of sound. WaveGuide makes it easier to position the speakers in the room. Another big challenge is to ensure a uniform dispersion in the treble and midrange frequencies. In general, dispersion becomes narrower as the frequencies get higher. Consequently, in the area where the mid/woofer and the tweeter should integrate smoothly, the mid/ woofer has narrow dispersion and the tweeter has wide dispersion. This problem is solved with the Jamo WaveGuide. The completely smooth design of the WaveGuide also reduces diffractions to an absolute minimum. Finally, the WaveGuide increases treble output in the lower treble range, which means the tweeter needs less power for the same SPL. So, power handling is improved and distortion is reduced. HCC (Hard Conical Cone) The HCC technology (Hard Conical Cone) enables the driver to reach far beyond midrange frequencies before any significant cone break-ups occur. The material's rigidity and the cone's conical shape ensures the unit creates clear and detailed sound with very little distortion, even at high sound pressures. This combines with the natural rubber suspension, which effectively prevents vibrations from travelling back to the diaphragm; the result is a very well-controlled diaphragm that operates without break-ups up to 4kHz -well beyond its working range. Jamo HCC operates without break-ups. Signal well attenuated after 1msec. dB 25.0 20.0 15.0 10.0 5.0 1k 2k Cumulative Spectral Decay Hz dB (SPL) 120 110 100 ▲ On-axis 90 ▼ Off-axis 80 70 60 50 40 30  20 100 WaveGuide Normal tweeter 200 500 1k 2k 5k 10k 20k The WaveGuide result in a uniform treble dispersion pattern from 10kHz all the way down to the critical crossover point at 2kHz and thus ensures a seamless transition to the mid/woofer - both when listening on and off axis. Other speaker break-up. Signal still occuring after 1msec. dB 25.0 20.0 15.0 10.0 5.0 1k 2k Cumulative Spectral Decay Hz 0.00 0.50 1.00 1.50 2.00 2.50 4k msec 4k 0.00 0.50 1.00 1.50 2.00 2.50 msec 4k msec 4k 60