Russound R275HC Stereo Amplifier User Manual
Contents
1. Stereo Bride ige Left Left Right Right JARNING 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 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 on the filter is set to 3dB at 40 Hz When off the frequency response is flat from 20Hz to 20kHz EJ Gain Controls Left and Right gain controls inde pendently adjust the sound level for each channel When used in the bridged mode only the Left control is used 4 Loop Output The loop output is a passive passthrough of the line input These jacks can be used to daisy chain the input signal to another amplifier in the system 5 Speaker A B Outputs The A and B speaker out puts are in parallel to the amplifier output The mini mum load in stereo mode is 4 ohms This can be used to drive up to 2 pairs of 8 ohm speakers or 1 pair of 4 ohm speakers The minimum load imped ance for bridged mode operation is 8 ohms Speaker B only KJ Stereo Bridge Mono Switch Sets the pair of amplifier channels for stereo or bridge mono opera tion Line Input The line audio input is a sensing input that will activate the amplifier when an audio signal from a source is2. RYRussound R Series R275HC 2 Channel Power Amplifier User s Manual IMPORTANT SAFEGUARDS RISK OF ELECTRIC SHOCK DO NOT OPEN WARNING TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE CAUTION TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE COVER NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALE FIED SERVICE PERSONNEL The lightning flash with arrowhead symbol within an equilateral h triangle is intended to alert the user to the presence of uninsu lated dangerous voltage within the products enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance servicing instructions in the literature accompa nying the appliance SAFETY INSTRUCTIONS 1 Read Instructions All the safety and operating instructions should be read before the appliance is operated 2 Retain Instructions The safety and operating instructions should be retained for future reference 3 Heed Warnings All warnings on the appliance in the operating instructions should be adhered to 4 Follow Instructions All operating and user instructions should be followed 5 Water and Moisture Do not use this appliance near water for example near a bathtu
3. radi ators heat registers stoves or other appliances including amplifiers that produce heat 9 Grounding or Polarization Precautions should be taken so that the grounding or polarization means of an appliance is not defeated 10 Power Cord Protection Power supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against them paying particular attention to cords at plugs receptacles and the point where they exit from the appliance 11 Power Sources The appliance should be connected to a power supply only of the type described in the operating instructions or as marked on the appli ance 12 Main Power Disconnect The power switch is a single pole switch When the switch is in the Off position the appliance is not completely disconnected from the main power The main power plug is used as the disconnect device and shall remain readily operable When installing the product ensure that the plug is easily accessible 13 Non use Periods The power cord of the appliance should be unplugged from the outlet when left unused for a long period of time 14 Attachments Only use attachments accessories specified by the manufac turer 15 Carts and Stands The appliance should be used only with a cart or stand that is recommended by the manufacturer An appliance and cart combination should be moved with care Quick stops excessive force and uneven surfaces A may cause the
4. appliance and cart combination to overturn 6 Wall or Ceiling Mounting The appliance should be mounted to a wall or ceil ing only as recommended by the manufacturer 17 Location of the Amplifier Do not mount this unit under a kitchen cabinet Do not expose the amplifier to direct sun light or heating units as the amplifier internal components temperature may rise and shorten the life of the compo nents Avoid damp and dusty places 8 Object and Liquid Entry Care should be taken so that objects do not fall and iquids are not spilled into the enclosure through the openings Servicing The user should not attempt to service the appliance beyond that described in the operating instructions All other servicing should be referred o qualified service personnel 20 Damage Requiring Service The appliance should be serviced by qualified service personnel when The power supply cord or the plug has been damaged or Objects have fallen or liquid has been spilled into the appliance or The appliance has been exposed to rain or The appliance does not appear to operate normally or The appliance has been dropped or the enclosure is damaged Ne mMm0UOWD D gt C US 227897 R275HC AMPLIFIER INTRODUCTION The Russound R275HC is a 2 channel high current power The R275HC is rated at 75 watts per channel into 8 amplifier capable of driving low impedance loads and ohms and 100 watts into 4 ohms With the incorpora
5. b washbowl kitchen sink laundry tub in a wet basement or near a swimming pool Do not expose the appliance to dripping or splashing and do not place on the appliance objects filled with liquids such as vases 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 inspec tion 6 Cleaning The appliance should be cleaned only as recommended by the manufacturer From time to time you should wipe off the front and side pan els and the cabinet with a soft cloth Do not use rough material thinners alcohol or other chemical solvents or cloths since this may damage the finish or remove the panel lettering 7 Ventilation The appliance should be situated so that its location or position does not interfere with its proper ventilation For example the appliance should not be situated on a bed sofa rug or similar surface that may block the ventilation openings or placed in a built in installation such as a book case or cabinet that may impede the flow of air through the ventilation open ings Place the unit in a wellventilated location leaving at least 2 inches 5 cm of clearance on all sides top and rear of unit for air flow If ventilation is blocked the unit may overheat and malfunction 8 Heat The appliance should be situated away from heat sources such as
6. ifier under a thermal overload condition Thermal protection mode can 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 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 tempera tures the amplifier may be powered back on Positive Negative Speaker cable 8 ohm Speaker PROTECTION CIRCUITRY All Russound amplifiers are designed with special circuit ry to safeguard the amplifier under a short circuit condi tion A faulty speaker can also cause a short circuit con dition The front panel LED illuminates orange when the amplifi er is in short circuit protection If this fault condition occurs turn off the amplifier and check speakers for short circuit conditions when appropriate R275HC AMPLIFIER POSSIBLE SYSTEM CONFIGURATIONS The R275HC can be configured for large autoformer based volume control systems 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 select
7. ors and increases the efficiency of the system aaa Low Cut switch in On position SEES SEVIS RUSSOUND SPEAKERS SPEAKERS TANT EXPANSIONS jO ZEO Autoformer based volume control ORS EZB 1SC Modular Connecting Block H O 8 ohm Speaker Q 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 ANNETUN aszazintenrace RYN AO KEYPAD PORTS BY een w CONA INTERNAT sone T Serial Nour 0 0O 0O 0O Os 2 3 4 5 6 1 COMIR ANTENNA FM Coax loop aczaov T Lacnov LAR T 8 e o egies 75 GND AM OLR Surat NICE ea 1 0 6 N eur gt A E Varans 100120 3A 2202400 125K 3060 i Mov F30AH2S0V 240V T12SAH 250V 3 Ec amp Serai NO __ NRussound us 227897 Speaker Cable Speaker Cable 8 ohm Speaker 8 ohm Speaker SPECIFICATIONS S
8. 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 BRIDGED OPERATION When the amplifier is in Bridged mode operation both the left and right channels are combined for a higher power mono output For bridged amplifier operation turn off the power to the amplifier and connect an 8 ohm minimum load to the Speaker B output R275HC AMPLIFIER Following the Bridge mode markings in red on the back of the amplifier Connect the negative lead of the speaker cable to the R terminal Connect the positive lead of the speaker cable to the L terminal Set the Stereo Bridge Mono switch to Bridge Mono connect the Line In feed from a source to the Left Line In connection and restore power to the amplifier rotection Serial NO RWRussound Gi Newmarket NH USA This unit contains no user serviceable pare Stereo Bridge Leff Audio RCA Cable from source THERMAL PROTECTION All Russound amplifiers are designed with special circuit ry to safeguard the ampl
9. tereo Continuous Output Power Bridged Output Power THD N Signal to Noise Ratio Frequency Response Input Sensitivity Input Impedance Voltage Gain Power Requirements Power Requirements Dimensions Weight WARRANTY R275HC AMPLIFIER 75W per channel at 8 ohms 100W per channel at 4 ohms 200W at 8 ohms 2 channels bridged lt 0 05 from 20Hz to 20kHz gt 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 The Russound R275HC is fully guaranteed for two 2 years from the date of purchase against all defects in materials and workmanship During this period Russound will replace any defective parts and correct any defect in workman ship without charge for either parts or labor For this warranty to apply the unit must be installed and used according to its written instructions If service is necessary it must be performed by Russound The unit must be returned to Russound at the owners expense and with prior written permission Accidental damage and shipping damage are not considered defects under the terms of the warranty Russound assumes no responsibility for defects resulting from ab
10. tes selectable volume control protection circuitry Stereo Bridge Mono switch in the Bridge Mono position both amplifier channels are combined for a higher pow ered 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 pro tection circuitry for safety and reliability under extreme circumstances This amplifier can be used for power upgrades in specif ic zones for large speaker selector or volume control systems and for long series parallel speaker runs e g large outdoor zones FRONT PANEL RussouND R275HC POWER AMPLIFIER 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 Rack Ear Front View Side View R275HC AMPLIFIER r FATE r n Ea off On Serial NO Za anigenetsoupn Z MRussound amp ey e 227897
11. use or servicing performed by an agency or person not specifically authorized in writing by Russound Damage to or destruction of components due to improper use voids the warranty In these cases the repair will be made at the owners expense To return for repairs the unit must be shipped to Russound at the owners expense along with a note explaining the nature of the service required Be sure to pack in a corrugated container with at least 3 inches of resilient material to protect the unit from damage in transit Russound sells products only through authorized Dealers and Distributors to ensure that customers obtain proper support and service Any Russound product purchased from an unauthorized dealer or source including retailers mail order sellers and online sellers will not be honored or serviced under existing Russound warranty policy Any sale of products by an unauthorized source or other manner not authorized by Russound shall void the warranty on the applicable product RYRussound R Series R275HC 2 Channel Power Amplifier User s Manual 5 Forbes Rd Newmarket NH 03857 USA Tel 603 659 5170 e Fax 603 659 5388 e mail tech russound com 28 1167 03 22 05
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