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Overview: The Russound X225 is a dual source 2-channel power amplifier.
The X225 features volume and balance controls, as well as A/B speaker switching
on the front panel.
Power Output: The X225 is a Class D amplifier rated at 225 watts per
channel into 4 ohms, and 150 watts per channel into 8 ohms. Both amplifier
channels can be bridged for a higher power mono output of 470 watts into a
single 8 ohm load (The Stereo/Bridge switch on the back panel should be in the
Bridge Mono position when bridging.)
Signal Sensing Inputs: The X225 can be turned on manually or
automatically by setting a switch on the rear panel. For manual power, the front
panel power switch turns the unit on or off. When set to automatic, the unit
will power on when music is sensed on either RCA input connector. Once the
signal is no longer detected, the unit will automatically shut off. The signal
sensing feature also allows you to switch from one input source to another by
turning one of the connected components on or off. Signal
sensing inputs allow the amplifier to easily integrate with multi-room audio
systems and home theater components.
Line Level Output: In addition to the line level inputs, the
X225 has a stereo RCA line level output. This output allows you to send the
audio of the selected source to another amplifier.
Speaker Level Signal Inputs: If you have a source that is
only available as a speaker level signal, you can connect it to the amplifier
via the spring clip input terminals on the back panel. Only one set of speaker
level inputs can be utilized and assigned by the selector switch. You can set
the speaker level input as the primary or secondary signal.
12V Trigger: On the back panel, there two 3.5mm minijacks
for a 12-volt trigger input and a 12-volt (100mA) trigger output. These allow
the amplifier to be activated by, or to activate, other devices with a mini-plug
cable. The trigger delay can be set between 3 and 15 seconds.
Thermal Protection: The amplifier is designed with a special circuitry
that protects the unit under a thermal overload condition. Thermal protection
mode will only engage when the unit has been run at high volume for extended
periods without adequate ventilation and/or when speaker impedances are below
the minimum levels. For proper ventilation, it is recommended that the amp have
a minimum of 2" of clearance around each side of the unit.
Short Circuit Protection: In addition to thermal protection, the
also has special circuitry to protect the amplifier from short-circuit
conditions. This can be caused by a faulty speaker or when speaker wires come in
contact with each other. When this condition occurs, the amplifier will shut
down until the short circuit is corrected.