User manual BBE SOUND DI-100

[. . . ] ·Wall or Ceiling Mounting - If your appliance can be mounted to a wall or ceiling, mount it only as recommended. USE ·Power Source - Connect the appliance to a power supply only of the type described in the operating instructions or as marked on the appliance. ·Power-Cord Protection - Route the power cord so that it is not likely to be walked on or pinched by having objects placed on it, paying particular attention to the plugs, receptacles, and the point where the cord exits from the appliance. ·Grounding or Polarization - Do not defeat the grounding or polarization feature of the AC power cord. [. . . ] 9VDC External Power Source If any of these items are found to be damaged or missing, immediately contact the BBE dealer from whom the unit was purchased. This manual will help you to effectively utilize the BBE DI-100. Reviewing the information contained in this manual will answer most of the common questions that our service department receives. If you still have questions, please feel free to call (714) 897-6766. BBE DI-100 INSTALLATION INSTRUCTIONS - 1 The BBE Process - `What it is' Loudspeakers have difficulty dealing with the electronic signals supplied by an amplifier. These difficulties cause such major phase and amplitude distortion that the sound reproduced by a speaker differs significantly from the sound produced by the original source. In the past, these problems proved unsolvable and were thus delegated to a position of secondary importance in audio system design. However, phase and amplitude integrity is essential to accurate sound reproduction. Research shows that the information which the listener translates into the recognizable characteristics of a live performance are intimately tied into complex time and amplitude relationships between the fundamental and harmonic components of a given musical note or sound. These relationships define a sound's "sound". When these complex relationships pass through a speaker, the proper order is lost. A lower frequency may reach the listener's ear first or perhaps simultaneously with that of a higher frequency. In some cases, the fundamental components may be so time-shifted that they reach the listener's ear ahead of some or all of the harmonic components. This change in the phase and amplitude relationship on the harmonic and fundamental frequencies is technically called "envelope distortion. " The listener perceives this loss of sound integrity in the reproduced sound as "muddy" and "smeared. " In the extreme, it can become difficult to tell the difference between musical instruments, for example, an oboe and a clarinet. conducted extensive studies of numerous speaker systems over a ten year period. With this knowledge, it became possible to identify the characteristics of an ideal speaker and to distill the 2 - BBE DI-100 INSTALLATION INSTRUCTIONS corrections necessary to return the fundamental and harmonic frequency structures to their correct order. While there are differences among various speaker designs in the magnitude of their correction, the overall pattern of correction needed is remarkably consistent. The BBE process is so unique that 42 patents have been awarded by the U. S. Patent Office. The BBE Process - `How It Works' The BBE Process imparts a pre-determined phase correction to the high frequencies where most harmonic information exists. This is done by breaking the signal into three sub-bands or groups: a. ) LOs (20Hz 150Hz), b. ) MIDs (150Hz - 1200Hz), and c. ) HIGHs (1200Hz - 20kHz). The low group is delayed about 2. 5 ms (milliseconds) via a delay within the passive low pass filter. The front panel Lo CONTOUR control allows for either a flat response or a boost at 50Hz. The mid-range group is delayed only about 0. 5ms and passes through an active band-pass filter while the high frequency group is passed through a VCA (Voltage Controlled Amplifier). [. . . ] However, it is strongly recommended that a copy of the bill of sale is retained 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 REQUIRED. The BBE DI-100 Sonic Maximizer is warranted against defects in material and workmanship for a period of five (5) years from date of purchase from BBE Sound, Inc. During this period, we will repair units free of charge providing that they are shipped prepaid to BBE Sound, Inc. , 5381 Production Drive, Huntington Beach, CA 92649. will pay return UPS shipping charges within the USA. [. . . ]