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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 2250’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
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 28.28: 1 volt at the input jacks corresponds to a 28.28 volts
at the speaker terminals. THX recommends this setting whenever the 2250 is installed with
other THX-certified components.
Note: You may wish to experiment with different gain settings on your preamp or a non-THX
surround controller and on the Model 2250 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.
Manual Audio Sens
Max Min
12V Trigger
Audio
Auto Turn On
12V
Ground
Lift
Norm
In Loop
CAUTION
To Prevent Electric Shock, Do Not
Remove Cover. No User-Serviceable
Parts Inside. Refer Servicing To
Quali fied Ser vice Per sonn el.
WARNING
To Pr event Fire Or
Sh ock Hazard, Do
Not Expose This Unit
To Rain Or Moisture.
2250 Two Channel Amplifier
Parasound Products, Inc.
San Francisco,
CA U S A
Mono
Stereo
20Hz 40HzFlat
Bridging
High Pass Filter
Level
Input Loop
R
Mono
L
R
L
Mono
THX
Ref
THX
Ref
Speaker Pair A
L
R
Mono
Speaker Pair B
L
R
Mono
Power Consumption: 1000W
THX and Ultra2 are trademarks of THX Ltd.
which may be registered in some jurisdictions.
All right reserved.
4-8
Ohms
2-3
Ohms
230V
50Hz
115V
60Hz
AC
Voltage
Load
Impedance
AC 115V/60Hz
AC 230V/50Hz
AC 115V/60Hz
AC 230V/50Hz
Manual Audio Sens
Max Min
12V Trigger
Audio
Auto Turn On
12V
Ground
Lift
Norm
In Loop
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.
2250 Two Channel Amplifier
Parasound Products, Inc.
San Francisco,
CA U S A
Mono
Stereo
20Hz 40HzFlat
Bridging
High Pass Filter
Level
Input Loop
R
Mono
L
R
L
Mono
THX
Ref
THX
Ref
Speaker Pair A
L
R
Mono
Speaker Pair B
L
R
Mono
Power Consumption: 800W
THX and Ultra2 are trademarks of THX Ltd.
which may be registered in some jurisdictions.
All right reserved.
4-8
Ohms
2-3
Ohms
230V
50Hz
115V
60Hz
AC
Voltage
Load
Impedance
AC 115V/60Hz
AC 230V/50Hz
AC 115V/60Hz
AC 230V/50Hz