Russound R290DS - Manual (Page 4)

4 Russound R290DS Installation Manual
Introduction
The Russound R290DS is a 2-channel 90 watt dual source power amplifier with
auto-source switching. It features Primary and Secondary audio line inputs with
a loop out to another zone, receiver, or device from the Primary source. A signal
only available as a speaker input can be connected and assigned as either the
primary or secondary source.
This amplifier can be used for power upgrades in specific zones, for large speaker
selector or volume control systems and for long series-parallel speaker runs
(e.g., large outdoor zones).
The R290DS is rated at 90 watts per channel into 8 ohms, and 110 watts into 4
ohms. With the Stereo/Bridge Mono switch in the Bridge Mono position, both
amplifier channels are combined for a higher powered mono output. In Bridge
mode the R290DS is rated at 220 watts of power into a single 8 ohm load. Each
amplifier output channel incorporates robust protection circuitry for safety and
reliability under extreme circumstances.
The 12V Trigger In/Out allows the R290DS to be activated by other electronics
or to activate other electronics via a 3.5 mm mini phone plug cable.
Thermal Protection
All Russound amplifiers are designed with special circuitry to safeguard the
amplifier under a thermal overload condition. Thermal protection mode will
only engage when the unit has been run at high volume for extended periods
of time without adequate ventilation and/or when speaker impedances are
below the minimum levels for the amplifier. In thermal protection mode the
amplifier will automatically stop output and the status indicator LED will go OFF.
If this fault occurs, turn off the amplifier, and check that the speaker impedance
rating is above the minimum rating. Also check for adequate ventilation around
the amplifier and make adjustments if necessary. Once the unit has cooled to
safe operating temperatures, the amplifier may be powered back on.
pRODUCT OVERVIEW
Protection Circuitry
Special circuitry has been designed into the amplifier to safeguard under
a short-circuit condition. A faulty speaker can also cause a short circuit
condition.
The front panel LED illuminates orange when the amplifier is in short circuit
protection. If this fault condition occurs, turn off the amplifier and check
speakers for short circuit conditions when appropriate.
Rack Mounting
The R290DS amplifier can be rack mounted using the included rack-mount
ears and hardware to attach the ears to the amplifier. The amplifier will take two
rack spaces with the feet removed.
If mounted in a rack , one open rack space above and below is recommended
to allow for ventilation and heat dissipation.
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Side View Rack Ear
Front View
Rack Ear
Side View
Rack Ear
Screw Holes