Parasound 2250 manual Rear Panel Connections and Controls, Connection Precautions, Loop Jacks

4REAR PANEL CONNECTIONS AND CONTROLS

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.

2250 Two Channel Amplifier			THX and Ultra2 are trademarks of THX Ltd.
Parasound Products, Inc.			which may be registered in some jurisdictions.
	Speaker Pair A	Speaker Pair B	All right reserved.
San Francisco, CA U S A
R	L	R	L
	Mono	Mono

Level

Input

Loop

Power Consumption: 1000W

L

L

Load

AC

Auto Turn On

THX

Impedance

Voltage

Manual

Audio Sens

12V Trigger

Ground

Ref

High Pass Filter

Bridging

CAUTION

WARNING

In

Loop

R

R

To Prevent Electric Shock, Do Not

To Prevent Fire Or

Mono

Mono

Audio 12V

Max

Min

Lift Norm

THX

Flat

20Hz 40Hz

Stereo

Mono

Remove Cover. No User-Serviceable

Shock Hazard, Do

Ref

Parts Inside. Refer Servicing To

Not Expose This Unit

2-3

4-8

115V

230V

AC

115V/60Hz

Qualified Service Personnel .

To Rain Or Moisture.

Ohms

Ohms

60Hz

50Hz

AC

230V/50Hz

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.

LevelInput Loop

L		L
	THX
	Ref	High Pass Filter	Bridging

R

ono

	R
	Mono
THX	Flat 20Hz 40Hz	Stereo	Mono
Ref

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.