User manual BBE SOUND 262

[. . . ] 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. If your AC receptacle will not accept the power cord plug, contact your electrician to install a proper AC receptacle. [. . . ] 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). The high group is used as a point of reference to make dynamic amplitude corrections to the high frequencies. The RMS average loudness detectors continuously monitor both the mid-range and high frequencies to compare the relative harmonic content levels of the two bands and apply the appropriate amount of control voltage to the VCA, thereby determining the amount of high frequency harmonic content present at the final output of the BBE processor. FRONT PANEL CONTROLS 1 2 3 4 5 1. CHANNEL A: LO CONTOUR CONTROL: Each channel is equipped with a LO CONTOUR control. It provides a boost of 10dBu when turned to its maximum position (clockwise) at 50Hz. When turned to its minimum position, (counter-clockwise), the low frequency is flat. CHANNEL A: PROCESS CONTROL: Each channel is equipped with a BBE PROCESS control. The BBE Process gives the user a more detailed perception of tonality, added `bite' and an increase in clarity. The low frequency range of the program material will be tightened while the high end will be crystal clear without adding or creating any additional noise or harmonic distortion. When the knob is in its minimum position, completely counter-clockwise, no process is taking effect. Adjust the knob to mix the desired amount of BBE Process to suit your taste. The BBE Process also has its own in/out switch for comparison of the processed to unprocessed signal located on the front panel. To start, set the BBE PROCESS knob to its 12 o'clock position, then adjust accordingly. When depressed, the `IN' position, the indicator LED will illuminate Green indicating that the BBE Process has been engaged. When in the `OUT' position, the indicator LED will illuminate RED, indicating that the BBE Process has been disengaged. BBE 262 INSTALLATION INSTRUCTIONS - 3 REAR PANEL CONNECTIONS 6. POWER SWITCH: This push button switch applies AC power to the BBE 262 Sonic Maximizer and is used for turning the unit on and off. FOOTSWITCH INPUT: This mono jack is for connecting any mono shorting footswitch. Using the remote switching jack defeats the front panel function switch and allows the selection of process on/off via footswitch. [. . . ] All non-warranty repairs are warranted for a period of 90 days from the date of service. Should the unit fail to operate for any reason, our sole obligation is to repair the unit as described above. BBE 262 INSTALLATION INSTRUCTIONS - 15 TEST PROCEDURE FOR THE BBE 262 INITIAL UNIT SET UP: Power switch off, BBE switch out, all controls at minimum. Turn on the power switch of the unit and verify that the front panel L. E. D. Adjust signal generator for an output of 4 volts peak to peak at 5kHz. [. . . ]