User manual BBE SOUND MAXCOM

[. . . ] OWNERS MANUAL SAFETY RELATED SYMBOLS protective grounding wire or disconnect the wiring of protective grounding terminal. · Operatng Condtons The symbol is used to indicate that some hazardous live terminals are involved within this apparatus, even under the normal operating conditions. The symbol is used in the service documentation to indicate that a specific component shall be only replaced by the component specified in that documentation for safety reasons. OFF: Denotes the apparatus is turned off, because it uses the single pole switch, be sure to unplug the AC power to prevent any electric shock before you proceed with your service. [. . . ] has developed a circuit that has two primary functions. The first adjusts the phase relationship of the low, mid and high frequencies. Since a loudspeaker¹s natural tendency is to add progressively longer delay times to higher frequencies, the BBE circuit adds progressively longer delay times to lower frequencies. This creates a kind of "mirror" curve to the time delay curve in the speaker and neutralizes its distorting effect. The second major element in the BBE system is the augmentation of the higher and lower frequencies. Loudspeakers tend to be less efficient in their extreme treble and bass ranges. Most sound-reproducing systems include a circuit for boosting high and low frequencies, showing an accepted awareness of the loudspeaker¹s efficiency problem. The BBE system, however, provides a dynamic, program-driven augmentation which combines with the phase compensation feature to restore the brilliance and clarity of the original live sound. The result is, as one professional journal phrased it, "The most hearable advance in audio technology since high fidelity itself!". COMPRESSION EFFECT At the beginning of this chapter, we dealt briefly with the basic functions of a compressor/limiter. Now we will discuss this point in more detail, with reference to the threshold setting, input level and compression: consider an input signal which is applied to the inputs of two compressors. The threshold of the second compressor is set 10 dB higher than the threshold of the first compressor. Since a compressor only affects signals that exceed the threshold level, it is fairly obvious that the signal of the first unit, will be compressed more because as the threshold is lower, it is exceeded to a greater exceeded before. Furthermore, it is interesting to note that by comparing the input and output waveforms for the compressed mode, the quietest sections of the input signal have been effectively raised in level, whereas the loudest sections have been effectively decreased in level. The overall effect is that both ends of the dynamics range have been pushed towards the middle. The squashing effect of compression is important to remember and highlights the major difference between compressing and limiting. Compressing and limiting differ in one more aspect: the dynamic setting for attack and release times. For compression purposes, a preferably longer attack and release time is generally the best in order to keep the overall output signal within a specified dynamic range. For limiting applications, considerably shorter times are necessary to control transient signals or to increase headroom. To achieve inaudible compression, it is imperative to work with program dependent attack and release times and a Soft Knee response. The advantage of program dependent compression is most apparent when processing musical material that is varied. The MAXCOM is suitable for all applications because of its various time settings and the AUTO processor. [. . . ] WARRANTY Warranty registration of the unit to BBE Sound, Inc. It is strongly recommended that you retain a copy of the bill of sale for future reference. IT IS THE SOLE RESPONSIBILITY OF THE END USER TO PROVIDE THE BILL OF SALE OR OTHER MEANS OF PROOF OF PURCHASE TO VALIDATE THE WARRANTY IF WARRANTY SERVICE IS REQUESTED. The BBE MAXCOM is warranted against defects in material and workmanship for a period of two (2) years from date of purchase from BBE Sound Inc. [. . . ]