BBE Sonic Maximizer BBE 422A - Manual (Page 5)

The Controls
Operation of the BBE 422A is quite simple due to the sophisticated circuitry within the unit. Below are the names and pur­
poses of each control on the BBE 422A.
Doflnilion Control
HI Contour
LED Stack
Function Switch
Proceaa Switch
Fewer Switch
AC Power Cord
Fuse
Remote «Jack
Hl-Z Unbalanced Va”
cr RCA Output
Hl-Z Unbalanced
cr RCA Input
Front Panel
Each channel has a lo contour control that regulates the amount of phase compensated
bass equalization. This adjustment ranges from -12dBu (fully counterclockwise) to
-t-10dBu (fully clockwise) at 50Hz relative to the input. The middle position is flat or unity
gain.
Each channel has a definition control that regulates the amount of amplitude compensation
as indicated by the hi contour LED stack. The minimum (fully counterclockwise) position
yields a flat frequency response with phase compensation only. Turning clockwise
increases the amplitude of the high frequency band relative to the mid band amplitude pro­
viding an improved spectral balance between the high and mid bands.
Each channel is equipped with a set of LED indicators that instantly show the relative
amount of high band compensation compared to the mid band.
1) RED LED (marked “—”): Compression mode. The amplitude of the high band is too
high compared to the mid band and compression is being applied to compensate.
2) AMBER LED (marked “O”): Flat mode. No amplitude compensation is needed. The pro­
gram spectral content is correct.
3) GREEN LED (marked “-!-”): Expansion mode. The amplitude of the high band is too low
compared to the mid band and the amplitude of the high band is being expanded to
compensate.
4) CLIP LED: This LED indicates that the input of the BBE422A has reached the maximum
input level of -I- 16dBu.
The unit is equipped with a function push-button switch which allows for a quick com­
parison of processed with unprocessed sound. When the switch is depressed, the green
“In” LED lights. When the switch is out, the amber “Out” LED lights.
In the “Auto ” mode, the BBE422A provides dynamic response to the high frequency band
in relation to the mid band. This in turn will allow the BBE process to either expand or com­
press the high band.
The “Manual” mode, on the other hand, provides for a factory preset expansion ratio for
the high band. Both modes are controlled by the definition and lo-contour controls. “Auto”
mode would be considered normal operation.
This switch controls primary power to the BBE 422A.
Rear Panel
Plugs into AC power receptacle. U.S. Model,100-120Vac, 50/60Hz. Standard Model, 200-
240Vac, 50/60HZ.
Turn cap on fuse holder counterclockwise to remove fuse. (Note: For U.S. Model, replace
with 250VAC, V
2A Fastblow type fuse. For Standard Model, replace with 250Vac, .125A
Fastblow type fuse.)
An additional V 4” jack is provided for remote actuation of the function switch. Any push-on/
push-off single pole switch will work as a remote. The front panel function switch will
become inoperative when the remote jack is utilized.
Each channel is equipped with a ’A” phone jack and an RCA jack that is a high impedance
unbalanced line level output and can deliver up to -M 6dBu into 10k Ohms.
Each channel is equipped with a
'/4”
phone jack and an RCA jack that accepts a high
impedance unbalanced line level input with an average level of -lOdBu. (Note: -l-16dBu is
the maximum input before clipping.)
Set-Up
The BBE 422A is connected into the audio chain in series with the signal path—the same way a graphic equalizer or
limiter is connected. The output of the mixer, pre-amp or tape recorder feeds the input of the BBE 422A. Remember, source
outputs connect to the BBE’s inputs and as long as the signal source level is within the nominal range as mentioned in the pre­
vious section, the BBE 422A will function perfectly.
Setting-up and using the BBE 422A as an echo send device like a digital reverb is not recommended.The processing
effect is not fully realized when the output of the BBE 422A is summed with the original source audio.
The BBE 422A also has an additional quarter Inch jack for remote actuation of the process in/out switch. Any single-pole,
single-throw switch, such as a footswitch, will work.