The Russound R290DS is a 2-channel, 90 watts per channel, dual source high-current power amplifier with
auto-source switching, capable of handling low-impedance loads. It is ideal for larger rooms where you may be driving
two or more pairs of speakers and at higher power output than that offered by your chosen multiroom controller amplifier. You can also use it in conjunction with
a variable line level system such as an iPod dock, in order to drive single or multiple pairs of speakers.
The Russound R290DS has a selectable high-pass (low-cut) filter designed to protect autoformer-based volume controls and speaker selectors. It also includes an autosensing
input that activates the amplifier upon detecting an audio signal. This means that the amplifier remains on standby using very little power until it receives
the audio input when it switches on at full working level. The R290DS returns to standby mode when the audio signal ceases.
The Russound R290DS features Primary and Secondary audio line inputs with a loop out to another amplifier. This allows you to connect both sources
and set one to play as default and the other to over-ride it when it is turned on. This is in effect the Russound AB3.2 Automatic speaker switch built into
the unit. If one of the inputs is not line level but from an existing amplifier you can assign it to either of the two inputs.
The R290DS is rated at 90 watts per channel into 8 ohms and 110 watts per channel into 4 ohms. In bridged mono mode the R290DS is rated at 220 watts of power
into a single 8-ohm load, ie mono speaker. All this power is supplied by a high-output toroidal transformer. Each amplifier output channel incorporates
robust protection circuitry for safety and reliability under extreme circumstances.
This power amplifier provides a constant volume gain, and should be used in conjunction
with an audio source from a pre-amp. For example this could be the Russound CAA66 or
CAS44 multiroom amplifier
with the pre-amp switch set to variable pre-amp out. Alternatively, if you have your music stored on your computer, on a
Media Center PC, or a standalone
Imerge SoundServer, use the R290DS to amplify it to speaker level. Volume control would be achieved using the
built-in volume control of the computer or SoundServer. This arrangement also works well with audio streaming devices
if they have built-in line level volume controls.
If your audio source is at a fixed level, eg Sonance iPort, you will need to
use an in-line volume control such as the QED WM21, or select an IW21 or IW22.
One benefit of a high quality specialist power amp like the R290DS is the low level of impedance that it can handle. This means that you can connect multiple pairs of speakers to it, with or without a
multi-way speaker switch or wall mounted volume controls for a simple multiroom system. The R290DS handles down to 4 Ohms impedance meaning
that you can connect to 2 pairs of speakers without a speaker switch, or up to 5 pairs with an impedance matching switch such as the 5 way QED Transmatch.
The 12V Trigger In/Out on the Russound R290DS allows it to be activated by other electronics or to activate other electronics via a 3.5 mm mini phone plug cable.
The Russound R290DS 2-channel power amplifier has a space-saving low profile design and comes with ears for rack mounting.
Specification Russound R290DS
- Output Power, Stereo Mode, RMS: 90 Watts per channel @ 8 ohms, 110 Watts per channel @ 4 ohms
- Total Harmonic Distortion: 0.03% 20Hz-20kHz @ 8 ohms
- Signal to Noise Ratio: -110dB below rated output (A-weighted)
- Input Sensitivity: 70mV for 1W at 8 Ohms
- Input Impedance: 47k ohms, Min.
- Voltage gain: 32dB
- Delay Time: 5 seconds to 4.5 minutes
- Input Trigger: 12VDC 10 kilohms
- Output Trigger: 12VDC 100mA max
- Weight 7.8kg
- Dimensions (WxHxD): 430mm x 105mm x 355mm (rack size 2u)
For the installation manual for the Russound R290DS, click here.(1.5MB PDF file)
01603 660901
