User manual RUSSOUND R275HC

[. . . ] Do not touch the amplifier with wet hands. Do not handle the amplifier or power cord when your hands are wet or damp. If water or any other liquid enters the amplifier cabinet, take the amplifier to qualified service personnel for inspection. Cleaning - The appliance should be cleaned only as recommended by the manufacturer. [. . . ] 19. Servicing - The user should not attempt to service the appliance beyond that described in the operating instructions. All other servicing should be referred to qualified service personnel. 20. Damage Requiring Service - The appliance should be serviced by qualified service personnel when: A. The power - supply cord or the plug has been damaged; or B. Objects have fallen, or liquid has been spilled into the appliance; or C. The appliance has been exposed to rain; or D. The appliance does not appear to operate normally; or E. The appliance has been dropped or the enclosure is damaged. 2 R275HC AMPLIFIER INTRODUCTION The Russound R275HC is a 2-channel high-current power amplifier capable of driving low impedance loads and incorporates selectable volume control protection circuitry. 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 R275HC is rated at 75 watts per channel into 8 ohms and 100 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 R275HC is rated at 200 watts of power into a single 8-ohm load. All this power is backed by a high output toroidal transformer. Each amplifier output channel incorporates robust protection circuitry for safety and reliability under extreme circumstances. FRONT PANEL 1 1 Tri-color Indicator LED: The LED will illuminate red when the power is on and the amplifier is in standby, green when the amplifier is active and orange when in short circuit protection. RACK MOUNTING The R275HC amplifier can be rack mounted using the included rack-mount ears and hardware to attach the ears to the amplifier. The amplifier will take 2 rack spaces with the feet removed. R275HC Side View Rack Ear Screw Holes + + Rack Ear Front View Rack Ear Side View 3 R275HC AMPLIFIER 1 2 3 4 3 8 5 7 6 5 1 Power Switch: Turns the amplifier on/off. This switch does not disconnect the main power feed from the amplifier; this requires that the power cord be unplugged from the outlet. 6 Stereo/Bridge Mono Switch: Sets the pair of amplifier channels for stereo or bridge mono operation. Line Input: The line audio input is a sensing input that will activate the amplifier when an audio signal from a source is present. When there is no audio the zone will go into standby. The Left input is used for bridged mono operation only. AC Input: The AC voltage input for the North American model is 120VAC at 60Hz (for the European model, 230VAC at 50Hz). This receptacle accepts a 3-prong IEC 320 type connector. A detachable 3-terminal power cord is included. 7 2 Low Cut (High Pass) Switch: Enables/disables the filter that reduces very low frequency energy and protects autoformer-based volume control/speaker selectors. [. . . ] When using the R275HC for this application, set the Low Cut switch to the "On" position. Turning this filter "on" Line out from Source enables a filter that reduces the low frequency energy which protects the volume controls/speaker selectors and increases the efficiency of the system. Low Cut switch in "On" position EXPANSIONS RUSSOUND SPEAKERS SPEAKERS SPEAKERS SPEAKERS EZB-1SC Modular Connecting Block NI The R275HC can also be configured as a power upgrade for specific zones, for use with large speaker selectors and for long series-parallel speaker runs (e. g. , outdoor zones). R275HC Amplifier RCA Cable Speaker Cable 8-ohm Speaker 6 SPEAKERS SPEAKERS SPEAKERS SPEAKERS Autoformer-based volume control 8-ohm Speaker INPUT CAM6. 6 CAM6. 6T Controller Speaker Cable 8-ohm Speaker R275HC AMPLIFIER SPECIFICATIONS Stereo Continuous Output Power: Bridged Output Power: THD+N: Signal-to-Noise Ratio: Frequency Response: Input Sensitivity: Input Impedance: Voltage Gain: Power Requirements: 75W per channel at 8 ohms 100W per channel at 4 ohms 200W at 8 ohms, 2 channels bridged <0. 05% from 20Hz to 20kHz >100dB A-weighted 20Hz to 20KHz +/- 0. 3dB 70mV for 1W at 8 ohms 610mV for 75W at 8 ohms 47kohms Line Input 32dB North American Model: 120VAC 60Hz 2. 5A IEC 320 type connector with 3 terminal detachable power cord. European Model: 230VAC 50Hz 1. 2A IEC 320 type connector with 3 terminal detachable power cord. 17" W x 14"D x 4. 125"H (43 x 35. 5 x 10. 5 cm) 20. 3lbs. (9. 2kg) Power Requirements: Dimensions: Weight: WARRANTY The Russound R275HC is fully guaranteed for two (2) years from the date of purchase against all defects in materials and workmanship. [. . . ]