Sonance Sonamp 275 SE - Manual (Page 6)

BBE ® CONNECTIONS AND OPERATION
1. Status LEDs: Illuminate to show if the BBE process is ON, and how much
processing (+6dB or +9dB) is being applied.
2. BBE ON/OFF switch: In the OFF EXT . position, BBE processing is bypassed;
in the ON position BBE processing is applied.
• When this switch is in the OFF EXT . position BBE processing can be
automatically activated when an external control voltage is applied to the
BBE ON/OFF EXT. CTRL. connector.
3. BBE ON/OFF EXT. CTRL. connector: When a control voltage appears at this
connection and the BBE ON/OFF switch is in the OFF EXT . position, BBE
processing is automatically activated.
• The connection accepts AC or DC control voltages between 5V and 24V.
4. BOOST LEVEL +6dB EXT ./+9dB switch: Sets the amount of BBE processing
being applied to either +6dB or +9dB.
• When this switch is in the +6dB EXT . position the amount of BBE pro-
cessing being applied can be automatically changed to +9dB when an
external control voltage is applied to the BOOST LEVEL EXT. CTRL. con-
nector.
5. BOOST LEVEL EXT. CTRL. connector: When a control voltage appears at this
connection, and the BOOST LEVEL switch is in the +6dB EXT . position, the
amount of BBE processing being applied is automatically changed to +9dB.
• The connection accepts AC or DC control voltages between 5V and 24V.
High-Pass Filter Settings ( Figure 4)
The 275 SE and 275X3 SE have high-pass filters located on the BBE SAT
Module circuit board. The filter settings are determined by the positions of a
pair of shorting sleeves on jumper pins.
IMPORTANT: The high-pass filter jumpers are set at the factory in the
high-pass filter ON position. Sonance HIGHLY RECOMMENDS that these
jumpers remain in the ON position if the amplifier will be used in a system
that includes in-wall volume controls for the speakers. The amplifier’s
high-pass filters reduce infrasonic energy and help protect autoformer-
based volume controls from saturation and overload.
To bypass the high-pass filters, set the jumpers to the OFF position:
1. The jumper pins are located in the marked area of the BBE SAT module
circuit board, as shown in the upper portion of Figure 4.
2. As shown in the lower portion of Figure 4, remove the shorting sleeves from
their factory-set (ON) position on the jumper pins and replace them in the
OFF positions. Make sure you insert the shorting sleeves all the way onto
the jumper pins.
BBE SAT Module Connections
Systems With No External Control Capability ( Figure 5)
1. Connect the BBE module’s Input jacks to the stereo line-level source.
• If you’re operating the 275 SE in the bridged mode, use the R input only.
2. Connect the amplifier’s speaker outputs to the speakers.
3. If you wish to feed the source’s signal to additional amplifiers, connect them
to the BBE module’s Output jacks.
Note: The signal sent through the module’s Output jacks is not BBE processed.
Systems With External Control Capability ( Figure 6)
The BBE sound enhancement process can be activated and the amount of
BBE processing changed by an external control voltage. This allows an audio
system with two different sources to employ BBE processing for only one
source, or to employ different amounts of BBE processing for the different
sources.
Figure 6 shows a system with two sources (such as would be used in a doctor’s
office): a CD player playing uncompressed audio that doesn’t require BBE
processing, and an iPort™ with an iPod® playing compressed audio files that
could benefit from BBE enhancement. Both sources are connected to a
Sonance AL1 Line-Level Switcher that automatically switches to the iPod con-
nections whenever it senses an audio signal from the iPod. Whenever AL1
selects the iPod input it also sends a +12V control voltage to the BBE module’s
BBE ON/OFF EXT. CTRL. connector, which activates the BBE processing.
6
12 3 4 5
Figure 3: BBE SAT Module Controls and Indicators
TOWARDS
RIBBON
CONNECTOR
TOWARDS
INPUT/OUTPUT
CONNECTORS
AREA
DETAILED
BELOW
BBE SAT MODULE CIRCUIT BOARD
HI-PASS FILTER ON
(FACTORY DEFAULT)
HI-PASS FILTER OFF
Jumper
Sleeve
Jumper
Sleeve
Figure 4: BBE SAT Module High-Pass Filter Jumpers
I N S T R U C T I O N M A N U A L
S O N A M P ® 2 7 5 S E / 2 7 5 X 3 S E
S T E R E O P O W E R A M P L I F I E R