User manual BBE SOUND 882

[. . . ] 882 SONIC MAXIMIZER User Guide and Reference Manual i TABLE OF CONTENTS Important Safeguards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i BBE Process Explained . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Front Panel Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Rear Panel Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 General Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Application Diagrams. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10 Service /Warranty / Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Calibration Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Schematic Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-16 Congratulations on your purchase of the BBE 882 Sonic Maximizer--a balanced, two channel signal processor that will benefit any recording or sound reproduction system. You now own a very unique signal processing device with no equal in the audio world. Whether you purchased the BBE 882 for your recording studio, P. A. , DJ system, or instrument rack, you will find the 882's rugged construction and careful electronic design a welcome addition to your sonic arsenal. Thank you for your purchase, and for the trust that you've placed in BBE. [. . . ] FUSE: Turn cap on fuse holder counter-clockwise to remove fuse. Model, replace with 250Vac, 1/2A Fastblow type fuse. For all other models, replace with 250Vac, . 125A Fastblow type fuse. ) 3. OUTPUT: The output of the BBE 882 can be taken from the 1/4" stereo TRS Phone Jack or the XLR Jack. Both are balanced and the same point electronically. This allows both outputs to be used simultaneously, eliminating the need for a "Y" cord in the event multiple, balanced outputs are required. The recommended single load impedance is at least 10k Ohms. If both outputs are being used, a minimum of a 22k Ohm load per device is required. (The "load" is determined by the input impedance of the next subsequent component in the signal chain. ) The maximum output is rated at +23dBu. Pin #2 is considered the hot or "+" signal. The output impedance of the BBE 882 is 600 ohms. NOTE: Actual output level will vary due to the selected position of the BBE Process, and the actual input signal level. If both the XLR and Phone Jacks are being used, both must be either balanced or unbalanced. Otherwise a loss of signal level will occur. INPUT: The input of the BBE 882 is a balanced connection. Although is can be either a TRS 1/4" stereo Phone Plug or an XLR Plug, it is recommended that only one input source be used. Both jacks are the same point electronically, however, due to the input/output impedance characteristics of most audio devices, a loss of signal may occur and/or damage to a component if both inputs are utilized. Pin #2 is considered the hot or "+" signal. The input impedance of the BBE 882 is 14. 7k Ohms. CHANNEL A: These connections function the same as CHANNEL B. 4 Specifications Frequency Response, process mode: . . . . . . . . . . . . . . . Program controlled bypass mode: . . . . . . . . . . . . . . . 10Hz to 50kHz +/-0. 5dBu, 0dBu input Signal to Noise: . . . . . . . . . . . . . . . . . . . . . . . . -92dBu THD, process mode: . . . . . . . . . . . . . . . less than 0. 025% at -0dBu input, 20-20kHz bypass mode: . . . . . . . . . . . . . . . less than 0. 002% at -0dBu input, 20-20kHz Maximum Output: . . . . . . . . . . . . . . . . . . +23dBu (may vary due to control settings) Input Impedance: . . . . . . . . . . . . . . . . . . . . . 14. 7k Ohms, balanced 1/4" TRS phone jack or XLR jack Pin #2 hot or "+". Output Impedance: . . . . . . . . . . . . . . . . . . 600 Ohms, balanced 1/4" TRS phone jack or XLR jack Pin #2 hot or "+". Sensitivity: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -45dBu for maximum process Maximum Process: . . . . . . . . . . . . . . . . . . +12dBu boost at 5kHz, 0dBu input Lo Contour: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +12dBu boost at 50Hz, 0dBu input * 0dBu = 0. 775mVrms Power Requirements: . . . . . . . . . . . . . . . U. S. , Canada & Japan models: 120VAC, 50/60Hz, 8 WATTS Standard model: 220VAC, 50/60Hz, 8 WATTS Fuse: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Replace with the same type FASTBLOW fuse U. S. , Canada & Japan models: 250Vac, 1 /2A Fast blow type fuse. [. . . ] Lo Contour controls VR2 and VR4 to minimum. (C. C. W. ) 3. Power switch "ON" and BBE function switch "IN". With DVM set to DC volts, measure the positive end of C37. With DVM set to DC volts, measure the negative end of C39. [. . . ]