Jamo R 909 Sound Catalogue - 2011 - English - Page 61

Jamo tech platforms CENtRE-Plug The Centre-Plug replaces the traditional dust cap, making the cone both lighter and more responsive, while also cooling the voice coil resulting in higher power handling and a stable sound reproduction when playing loud. The design produces increased power handling capabilities along with a more uniform, precise and dynamic reproduction of sound. The Centre-Plug also prevents potential break-up points where the dust cap would have been glued to the cone. In addition, it prevents over- and under-pressure behind the dust cap when the cone moves back and forth. The advantage is more dynamic and precise sound reproduction. Dtt (DECOuPlED twEEtER tEChNOlOgY) DTT (Decoupled Tweeter Technology) is a mounting system specially developed by Jamo. One of the biggest challenges when designing speakers is preventing unwanted cabinet vibrations from clouding or colouring the sound. High frequencies are particularly susceptible. This problem is solved using the ingenious Jamo DTT. By decoupling the tweeter from the rest of the loudspeaker, vibrations transmitted from the front baffle to the tweeter are reduced by more than 20dB, resulting in an uncommonly detailed and realistic reproduction of high frequencies. dB (SPL) 100 95 90 85 80 75 Centre-Plug Normal speaker unit 70 50 100 200 500 1k 2k 5k Sound pressure level from a speaker with Centre-Plug compared to one without. dB 125 120 115 110 105 100 95 90 85 80 75 70 Normal front baffle DTT Overplot 60.0 100.0 1000.0 Difference between vibrations in a normal front baffle and vibrations in a front baffle employing Decoupled Tweeter technology. 61