Bose 2150 Installer's Manual - Page 17
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4.2 Rear panel (cont.)
CAUTION
AVIS
RISK OF ELECTRICAL SHOCK
RISQUE DE CHOC ELECTRIQUE
DO NOT OPEN COVER,
NE PAS OUVRIR CE CARTER,
AUTHORIZED PERSONNEL
RESERVE AU PERSONNEL
ONLY.
AUTORISE.
WARNING
TO REDUCE THE RISK OF FIRE OR ELECTRICAL SHOCK DO NOT
EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE
This device complies with part 15 of the FCC rules. Operation is subject to the following
conditions: (1) This device may not cause harmful interference and (2) this device must
accept any interference received, including interference which may cause undesired operation.
Complies with Canadian ICES-003 Class A specifications.
120VAC, 4.6A max.
60 Hz
600W
SERIAL No.:
®
Model 2150
D.O.M.:
BOSE CORPORATION
FRAMINGHAM, MA 01701-9168 U.S.A.
MADE IN U.S.A. OF DOMESTIC AND FOREIGN COMPONENTS.
10
7
1
Standard Input Module
2
Input Connectors
3
EQ Out Connectors
9. REMOTE LEVEL (remote level) control
Use a 1k to 10k potentiometer, preferably with a reverse log taper. Identify the terminal of
the pot to which the wiper is connected when the knob is set to the fully clockwise
position. Connect this terminal to the RTN (ground return) terminal of the REMOTE LEVEL
input plug.
Connect the center terminal of the pot to the CH1 (or CH2) control voltage terminal of the
REMOTE LEVEL input plug. The two channels are independently controlled by the voltages
applied to the CH1 and CH2 terminals. Both control inputs can be connected together and
driven off the wiper of one pot.
Connect the remaining terminal of the pot to the +5V terminal of the REMOTE LEVEL input
plug. This connection will set the control voltage to 0 with the knob fully clockwise (maxi-
mum level), 5V with the knob fully counterclockwise (minimum level).
Inside the amplifier, a 0V control voltage corresponds to 0dB added attenuation (that is,
added to the attenuation already set by the front panel level control for that channel). A 5V
control voltage corresponds to 100dB added attenuation. The control voltage effect is "dB
linear": a 2.5V control voltage input will add 50dB of attenuation: the control characteristic
is -1dB per 50mV.
REMOTE LEVEL control wiring recommendations
For best results, use 24AWG (or larger) control wiring, especially for the +5V and RTN
connections. Since 24AWG wire has DC resistance of 25mW per foot, using 1000 feet of
24AWG (total loop resistance of 50W) to make connection to a 5kW potentiometer will
result in a 1% voltage drop. This will cause a reduction in the control voltage range. This
voltage drop increases as more current is carried by the +5V and RTN conductors; for
example, when the 5V line is used to light a remote LED indicating that the amp is ON.
In the example given above, an additional 10mA load on the +5V and RTN conductors will
cause 10% reduction in control voltage range, yielding lower maximum level and higher
minimum level. Within reason, conductor capacitance is not a problem since the control
voltages are averaged in the amplifier and any additional RC delay will not be noticeable.
Note: Do not connect the RTN conductor to a ground reference at the remote control
location. Ground potential differences will drive currents through the RTN line and cause
unpredictable REMOTE LEVEL control performance.
9
CH 2
CH 1
SEQUENCE
REMOTE LEVEL
CH 2
CH 1
SND RCV
COM CH2 CH1 +5V
FX CH 2
FX CH 1
SEND
RECV
SEND
+
+
+
+
8
6
5
4
Equalizer Present LEDs
5
Speaker Outputs
6
Effects Loop
AM264080_00_V.pdf • June 21, 2002
Use Class 2 Wiring
For bridged operation.
Consult user manual.
WARNING
RISK OF HAZARDOUS
ENERGY! MAKE PROPER
SPEAKER CONNECTIONS.
SEE OPERATING
INPUT IMPEDANCE 25K OHMS EACH LEG TO GROUND (TOTAL 50K OHMS BALANCED)
MANUAL BEFORE USING.
AVERTISSEMENT
ENERGIE ELECTRIQUE
DANGEREU SE. VOIR
PUSH
LANOTICE
DE FONCTIONNEMENT.
INPUT CH 2
2
1
3
J20018292
+
2
1
RECV
3
PN# 1234567
2
7
Dip Switches
8
AC Power Sequence Connector
9
Remote Level Control
10
IEC Power Cord
4.0 Operation
SEND
RECEIVE
PUSH
INPUT CH 1
SEQUENCE
EQUALIZATION
2
1
ON
CH1
3
CH2
CH2
EQ. OUT
CH1
4
3
1
17