BBE Sonic Maximizer BBE 422 - Manual (Page 6)

The Controls
Operation of the BBE 422 is quite simple due to the sophisticated circuitry within the unit. Below are the names and purposes
of each control on the BBE 422.
Lo Contour Control
Definition Controi
Hi Contour
LED stack
Function Switch
Power Switch
Rear Panei
AC Power Cord
Fuse
Remote Jack
Hl-Z Unbaianced
V4" or RCA Output
Hl-Z Unbalanced
V4" or RCA Input
Each channel has a lo contour control that regulates the amount of phase compensated bass
equalization. This adjustment ranges from -lOdBu (fully counterclockwise) to +fOdBu (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 providing 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 program
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 output of the BBE 422 has reached the maximum input
level of + f 6dBu.
Each channel 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.
This switch controls primary power to the BBE 422.
Plugs into AC power receptacle.
Turn cap on fuse holder counterclockwise to remove fuse. (Note: replace with 250Vac, VzA type
fuse.)
An additional Va" 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 must be in the
process position in order for this jack to operate.
Each channel is equipped with a Vi” phone jack or an RCA jack that is a high impedance
unbalanced line level output and can deliver up to -H6dBu into 10k ohms.
Each channel is equipped with a VT' phone jack or RCA jack that accepts a high impedance
unbalanced line level input with an average level of OdBu. (Note: -
1 - 16dBu is the maximum input
before clipping.)
Set-Up
The BBE 422 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 422. Remember, outputs connect to
inputs and as long as the signal source level is within the nominal range as mentioned in the previous section, the BBE 422 will
function perfectly.
Setting-up and using the BBE 422 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 422 is summed with the original source audio.
The BBE 422 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.