bbe 482i sonic maximiser 电路图.pdf

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1、User Guide and Reference Manual RadioFans.CN 收音机爱 好者资料库 i RadioFans.CN 收音机爱 好者资料库 1 Important Safeguardsi BBE Process Explained 1-2 Product Description 2 Applications 2 Controls and Connections 3 Specifications 4 General Operation4 Application Diagrams 5-9 Service /Warranty / Maintenance 10 Calibrat

2、ion Procedures 11 Schematic Diagrams12-15 Congratulations on your purchase of the BBE 482i Sonic Maximizera 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 purc

3、hased the BBE 482i for your home studio, P.A., DJ system, or instrument rack, you will find the 482is rugged construction and careful electronic design a welcome addition to your sonic arsenal. Thank you for your purchase, and for the trust that youve placed in BBE. We are committed to bringing you

4、the finest products, with useful and unique features to serve your audio needs. The BBE ProcessWhat it Is Loudspeakers have difficulty working with the electronic signals supplied by an amplifier. These difficulties cause such major phase and amplitude distortion that the sound reproduced by speaker

5、 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 show

6、s 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 sounds “so

7、und”. When these complex relationships pass through a speaker, the proper order is lost. The higher frequencies are delayed. A lower frequency may reach the listeners ear first or perhaps simultaneously with that of a higher frequency. In some cases, the fundamental components may be so time-shifted

8、 that they reach the listeners 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

9、 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. BBE Sound, Inc. conducted extensive studies of numerous speaker systems over a ten year period. With this knowledge, it became possible to identif

10、y the characteristics of an ideal speaker and to distill the 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 nee

11、ded is remarkably consistent. The BBE Process is so unique that 42 patents have been awarded by the U.S. Patent Office. TABLE OF CONTENTS Product Description The BBE 482i is a dual channel, single rack space device for use in -l0dBu line level applications. For each channel there are one pair of Lo

12、Contour and Process knobs plus a 5 segment LED input level meter. A single function button switches the BBE process on or off in both channels, which is useful for comparing the processed sound to the unprocessed sound. An LED next to the function button glows green when the BBE process is on and re

13、d when the process is off. The Lo Contour controls are for adjusting the level of phase corrected low frequencies in the program material. The Process control is for adjusting the level of phase corrected high frequencies in the program material. Things to Remember The BBE 482i is designed to work w

14、ith -l0dBu line levels. This is suitable for professional and semi-pro mixers, P.A. consoles, recording studios, or D.J. equipment. The BBE 482i drives load impedances down to 1K Ohm and supplies a maximum output level of +18dBu. Plugging a guitar or other high impedance device directly into the BBE

15、 482i will not work properly as its input impedance is less than 50K ohms. Set-Up The BBE 482i is connected into the chain in series with the signal path the same way a graphic equalizer or limiter would be connected. The output of a mixer, pre-amp, or other sound source feeds the input of the BBE 4

16、82i. Setting up the BBE 482i as an echo send device like a digital reverb is not recommended as the processed effect is not fully realized when summed with the original source audio. APPLICATIONS Music and P.A. Systems The BBE 482i is a welcome addition to any live sound P.A. system because the BBE

17、circuit dramatically improves the clarity and intelligibility of vocals and musical instruments. Night club and mobile DJ systems will also benefit greatly from the BBE Process, with more depth, detail and punch over the entire mix. The 482i can be hooked up to any P.A. or DJ sound system exactly li

18、ke an equalizer would. When using in conjunction with an equalizer, the 482i should be added after the equalizer in the signal chain. In the event that the equalizer is being used for drastic tone alteration, then insert the 482i before the equalizer in the signal chain. Placement either before or a

19、fter an equalizer should have no negative effect on the 482i unit or its processing ability, however most users find they prefer more modest use of their equalizers once the BBE 482i has been added to their sound systems. Instrument Racks The BBE 482i will deliver surprisingly good results in guitar

20、, bass and keyboard rack systems. Electric guitars have added “bite”, “chunk” and improved definition. As Guitar Player magazine said, “BBE is the most cost effective improvement you can add to your rig”. Acoustic guitars processed with the 482i have a breathtakingly natural sparkle and presence. Ba

21、ssists will delight in the BBE 482is ability to bring much more punch to the bottom end without muddying up the midrange. The 482i is also great for keyboard rigs, with everything from the latest samples to a vintage Rhodes benefiting equally from the patented BBE process. Recording Systems The BBE

22、482i can be used as an effect on individual tracks or applied overall during mixdown. The BBE process works very well to liven up the final mix, which is why the BBE 482i and 882 models are popular for use in both recreational and professional recording studios. 2 W WA AR RN NI IN NG G! !To prevent

23、possible speaker or amplifier damage, always power-up peripheral devices first, wait 10 seconds, and then turn on the power amplifier. Turn off power amplifier first, then power-down peripheral devices. 1. LED DISPLAY: The LED display is used to indicate the output signal level of the BBE 482i. Each

24、 number on the front panel corresponds to the output signal level, measured in decibels. Example: The “0” indicates a 0dBu signal level, “-6” refers to -6dBu, and so on. Once an input signal level has been established, increasing the BBE PROCESS and LO CONTOUR will increase the output signal and cau

25、se more LEDs to illuminate. The Clip LED monitors the input signal level. The Clip LED will illuminate at +15dBu, giving a 3dBu warning of the impending distortion at +18dBu, the actual clip point. 2. LO CONTOUR: Regulates the amount of phase corrected bass frequencies. 3. PROCESS: Regulates the amo

26、unt of phase corrected treble frequencies. 4. BBE FUNCTION: This push button switch allows for quick comparison of processed with unprocessed sound. When the switch is pushed in, the process is on and the indicator LED is green. When the switch is out, the process is off and the indicator LED is red

27、. 5. POWER: This switch controls primary power to the BBE 482i. REAR PANEL CONNECTIONS 1. AC POWER CORD: Plugs into AC power receptacle. U.S. Model, 100-120Vac, 50/60Hz. All other models,20240Vac, 50/60Hz. 2. FUSE: Turn cap on fuse holder counter-clockwise to remove fuse. (Note: For U.S. Model, repl

28、ace 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 482i can be taken from the 1/4” Phone Jack or the RCA Jack. Both are unbalanced and are the same point electronically. This allows both outputs to be used

29、simultaneously, eliminating the need for a “Y” cord in the event multiple 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

30、 subsequent component in the signal chain.) The maximum output is rated at +18dBu. The output impedance of the BBE 482i is 1 k ohms. NOTE: Actual output level will vary due to the selected position of the BBE Process, and the actual input signal level. 4. INPUT: The input of the BBE 482i is an unbal

31、anced connection. Although is can be either a 1/4” Phone Plug or an RCA Plug, it is recommended that only one input source is 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

32、 to a component if both inputs are utilized. The input impedance of th BBE 482i is 47k Ohms. The maximum signal level is +18dBu. 5. CHANNEL A: These connections function the same as CHANNEL B. 3 FRONT PANEL CONTROLS 1 1 2 2 3 3 4 45 5 CALIFORNIA USA MODEL 482i US PATENT NO 4,482i,866 AND OTHERS Spec

33、ifications Frequency Response, process mode:Program controlled bypass mode: 10Hz to 50kHz +/-0.5dBu, -10dBu input THD,process mode:less than 0.025% at -10dBu input, 20-20kHz bypass mode: less than 0.002% at -l0dBu input, 20-20kHz Maximum Output: +18dBu (may vary due to control settings) Input Impeda

34、nce: 47k Ohms, unbalanced 1/4phone jack or RCA jack Output Impedance:1 k Ohms, unbalanced 1/4phone jack or RCA jack Sensitivity:-45dBu for maximum process Maximum Process: +12dBu boost at 5kHz, -l0dBu input Lo Contour: +12dBu boost at 50Hz, -l0dBu input * 0dBu = 0.775Vrms Power Requirements:U.S., Ca

35、nada 8 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. Standard model: 250Vac, .125A Fastblow type fuse Dimensions: . 19(W) x 5.5(D) x 1.7(H) Shipping Weight:

36、6.5 lbs. Note: Due to continuing product improvement, specifications and design are subject to change without notice. General Operation THE BBE 482i IS A LINE LEVEL SIGNAL PROCESSOR AND IS TO BE CONNECTED PRIOR TO THE POWER AMP IN ANY AUDIO SYSTEM. SIGNIFICANT DAMAGE MAY BE INFLICTED TO THE BBE 482i

37、 OR ANY SUBSEQUENT COMPONENT IN THE SYSTEM IN THE EVENT THE OUTPUT OF A POWER AMP IS CONNECTED DIRECTLY TO THE INPUT OF THE BBE 482i. In order to reduce the risk of damage to any equipment, properly connect all cables and power cables before turning on any components in the system. Most important of

38、 all, ALWAYS TURN ON THE POWER AMPLIFIER LAST TO AVOID DAMAGING THE SPEAKERS OR THE AMP. The BBE 482i may be utilized in a number of different environments and its results may vary accordingly. Because both channels are completely independent from each other, only one channel of the BBE 482i may be

39、used, or each channel processing a different signal source. The effects loop is the ideal placement in the signal chain of a guitar application. In a pre-amp, keyboard or P.A. application, the BBE 482i works best as the last component in the signal chain, just before the crossover or power amp. Impo

40、rtant: In a P.A. application, never connect the BBE 482i into the effects loop. The inherent phase shift of the BBE Process will cause phase cancellation resulting in a partial loss of signal. BBE and Equalization The most common question asked of the BBE Sound, Inc. service department is: “Where do

41、es the BBE Processor connect in the signal chain, before or after the equalizer?” Many people find that the same amount of equalization is no longer needed, if at all, when a BBE processor is used. Additionally, the amount of equalization used will help determine the BBE 482is proper location in the

42、 signal chain: If the EQ is being set to give the room a flat response as determined by a spectrum analyzer, the BBE 482i will work properly before or after the EQ. (Placing the BBE 482i after the EQ is recommended.) If the EQ is being used for drastic tone alteration, the recommended placement woul

43、d be before the EQ. Neither of these configurations will harm the BBE 482i. 4 LIVE APPLICATION: NON-POWERED MIXER 5 Connect the BBE 482i to the output of the mixing console. The output of the BBE will drive either a crossover or a power amplifier directly. MICROPHONES PA CABINETPA CABINET POWER AMPL

44、IFIER KEYBOARD MIXING CONSOLE BBE 482i SONIC MAXIMIZER CASSETTE DECK CALIFORNIA USA MODEL 482i US PATENT NO 4,482i,866 AND OTHERS LIVE APPLICATION: POWERED MIXER 6 There are a couple of ways to configure the BBE 482i into a powered mixer. The ideal method would be into “Pre-Amp Out/Power Amp In” sec

45、tion of the console. If your console does not have this option, use the main or channel insert points. PA CABINET PA CABINET MIXING CONSOLE MIXING CONSOLE BBE 482i SONIC MAXIMIZER BBE 482i SONIC MAXIMIZER CALIFORNIA USA MODEL 482i US PATENT NO 4,482i,866 AND OTHERS CALIFORNIA USA MODEL 482i US PATEN

46、T NO 4,482i,866 AND OTHERS RECORDING MASTERING OR DUBBING 7 Use the BBE 482i for mastering the recording. Even if the BBE Process has been used on individual tracks, an improvement on the total mix will be noticed. The BBE 482i can be utilized in the recording studio on individual instruments of on

47、groups on instruments to improve the sound quality. MIXING CONSOLE MIXING CONSOLE BBE 482i SONIC MAXIMIZER MULTITRACK RECORDER MULTITRACK RECORDER MASTERING DECK BBE 482i SONIC MAXIMIZER KEYBOARD CALIFORNIA USA MODEL 482i US PATENT NO 4,482i,866 AND OTHERS CALIFORNIA USA MODEL 482i US PATENT NO 4,48

48、2i,866 AND OTHERS INDIVIDUAL INSTRUMENTS 8 Use the BBE 482i in the effects loop or the main output of a guitar preamp. For keyboards, the output of the sub-mixer will be the ideal location. POWER AMP 4 X 12” CAB4 X 12” CAB BBE 482i SONIC MAXIMIZER GUITAR PREAMP CALIFORNIA USA MODEL 482i US PATENT NO

49、 4,482i,866 AND OTHERS 9 SOUND CONTRACTORS DJ APPLICATION Connect the BBE 482i into the processor loop of a pre-amplifier/mixer and hear the music come alive! The BBE 482i will accept the output level of most sound contractor type mixers. SPEAKERS SPEAKERS POWER AMPLIFIER POWER AMPLIFIER MIC AMPLIFIER BBE 482i SONIC MAXIMIZER BBE 482i SONIC MAXIMIZER DJ MIXER MAIN OUT PROCESSOR OUT PROCESSOR IN CALIFORNIA USA MODEL 482i US PATENT NO 4,482i,866 AND OTHERS CALIFORNIA USA MODEL 482i US PATENT NO 4,482i,866 AND OTHERS Service We recommend that if at all possible, a BBE 482i whic