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REAR PANEL CONNECTIONS AND CONTROLS
4
Connection Precautions
Disconnect the AC cord before making or changing any input, trigger, or speaker wire connections.
Make sure there is no strain or tension on any wires that could cause them to pull loose.
In Jacks
Connect the shielded audio cables from your preamplifier or system controller’s output jacks
to the Model 2125’s L and R audio Input jacks. Use only the R channel jack for mono operation.
Loop Jacks
The jacks replicate the audio input signals to facilitate connections of other power amplifiers
to the same preamplifier or system controller. Loop connection of multiple power amplifiers
is called a “daisy chain.”
Note:
You may loop the trigger connections of multiple Parasound power amplifiers without
Note: You may loop the trigger connections of multiple Parasound power amplifiers without Note:
overloading the surround controller or preamplifier trigger outputs.
R (Right) and L (Left) Level Knobs
You can adjust the listening level for each channel by turning its Level knob clockwise to
increase gain or counter-clockwise to reduce gain. The maximum settings correspond to THX
Reference Level where the gain is 29: 1 volt at the input jacks corresponds to a 28.28 volts at
the speaker terminals. THX recommends this setting whenever the 2125 is installed with other
THX-certified components.
Note:
You may wish to experiment with different gain settings on your preamp or a non-THX
Note: You may wish to experiment with different gain settings on your preamp or a non-THX Note:
surround controller and on the Model 2125 to find a combination of gain settings where your
system’s background noise is lowest. Sound professionals call these adjustments “gain staging.”
Note:
Only the R channel Level knob is used for bridged mono operation.
Note: Only the R channel Level knob is used for bridged mono operation.Note:
CAUTION
To Prevent Electric Shock, Do Not
Remove Cover. No User-Serviceable
Parts Inside. Refer Servicing To
Qualified Service Personnel.
WARNING
To Prevent Fire Or Shock Hazard,
Do Not Expose This Unit To Rain
Or Moisture.
2125 Two Channel Amplifier
Parasound Products, Inc.
San Francisco,
CA U S A
THX and Ultra2 are trademarks of THX Ltd.
which may be registered in some jurisdictions.
All right reserved.
Speaker Pair A
L
R
Mono
Manual Audio Sens
Max Min
12V Trigger Ground
Lift
Norm
Mono
Stereo
4-8
Ohms
2-3
Ohms
230V
50Hz
115V
60Hz
20Hz40HzFlat
Audio
Auto Turn On
Loop Level
Bridging
Input
12V
In Loop
R
Mono
THX
THX
AC 115V/60Hz
AC 230V/50Hz
Power Consumption: 550W
AC
Voltage
Load
Impedance
L
High Pass Filter
Speaker Pair B
L
R
Mono
CAUTION
To Prevent Electric Shock, Do Not
Remove Cover. No User-Serviceable
Parts Inside. Refer Servicing To
Qualified Service Personnel.
WARNING
To Prevent Fire Or Shock Hazard,
Do Not Expose This Unit To Rain
Or Moisture.
2125 Two Channel Amplifier
Parasound Products, Inc.
San Francisco,
CA U S A
THX and Ultra2 are trademarks of THX Ltd.
which may be registered in some jurisdictions.
All right reserved.
Speaker Pair A
L
R
Mono
Manual Audio Sens
Max Min
12V Trigger
Ground
Lift
Norm
Mono
Stereo
4-8
Ohms
2-3
Ohms
230V
50Hz
115V
60Hz
20Hz 40HzFlat
Audio
Auto Turn On
Loop Level
Bridging
Input
12V
In Loop
R
Mono
THX
THX
AC 115V/60Hz
AC 230V/50Hz
Power Consumption: 550W
AC
Voltage
Load
Impedance
L
High Pass Filter
Speaker Pair B
L
R
Mono