Parasound 275 - Manual (Page 6)

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 275’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 increase the listening level for each channel by turning its Level knob clockwise or
decrease by turning it counter-clockwise. The 275 has a gain of 28 so that its volume levels are
compatible with other channels in your theater if they are driven by a THX-certified amplifier, up
to the point where the THX-certified amplifier might play a bit louder because of its higher power
output. We recommend setting the 275’s R and L level controls to 3 o’clock if you are driving it
from a THX surround controller. This will avoid “clipping” and prevent audible distortion.
Note: You may wish to experiment with different gain settings on your preamp or a non-THX
surround controller and on the Model 275 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.
WARNING: To Prevent Fire Or Shock Hazard,
Do Not Expose This Unit To Rain Or Moisture.
AC 115V/60Hz AC 230V/50Hz
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 40Hz Flat
Audio
Auto Turn On Loop Level
Bridging
In
12V
In Loop R
Mono
+
+
AC 115V/60Hz AC 230V/50Hz
Power Consumption: 350W
AC
Voltage
Load
Impedance
275 Two Channel Amplifier
Parasound Products, Inc.
San Francisco, CA U S A
CAUTION: To Prevent Electric Shock, Do Not Remove Cover. No
User-Serviceable Parts Inside. Refer Servicing To Qualified Service Personnel.
L
High Pass Filter Speaker Pair B
L R
Mono
AC 115V/60Hz
AC 230V/50Hz
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 40Hz Flat
Audio
Auto Turn On Loop Level
Bridging
In
12V
In Loop
R
Mono
+
+
AC 115V/60Hz
AC 230V/50Hz
Power Consumption: 300W
AC
Voltage
Load
Impedance
275 Two Channel Amplifier
Parasound Products, Inc.
San Francisco, CA U S A
CAUTION: To Prevent Electric Shock, Do Not Remove Cover. No
User-Serviceable Parts Inside. Refer Servicing To Qualified Service Personnel.
L
High Pass Filter
Speaker Pair B
L R
Mono