Nady Systems SRA 2150 Stereo Amplifier User Manual
Contents
1. Fax 510 652 5075 www nadywireless com 2000 NADY SYSTEMS2. For use in Europe Controls amp Connections Xe rn 7 5 1 Wo REAR PANEL NU s 2 o aen CN me o em T OW m O Alsi OOS A ole QU Z s Va as ON TS 10 a2 13 16 2 aba FRONT PANEL 5 l i PN a oN AN E ooo Oz icd P _ p deno I f IA NIE E u 1 a TY DIG 5 2 1 3 E UN 7 Ji 8 c ON 4 6 8 UL 4 Mm AED m POWER SWITCH To turn the unit ON or OFF press the upper or lower portion of this button The LED in the switch will light to indicate that the unit is ON CAUTION Always turn on your power amplifier last after all your other connected equipment and always turn off your power amplifier before your other connected equipment 2 MONITOR JACK This 1 4 TRS phone jack allows monitoring of the amplifier with stereo headphones 3 SPEAKER ON OFF SWITCHES Turn off the main speakers with this switch for private amplifier output monitoring via the MONITOR JACK 4 SUB FILTER ON OFF SWITCHES Use this to eliminate the lowest frequencies from your output signal This steep low cut filter will help eliminate common low frequency problems in your signal such as hum and other signal components that can cause speaker rumble and or resonance without noticeably degrading the integrity of the audio 5 PEAKLED I
3. Buk 2 ES A US SRA 21 20 2 X 150W 250W BRIDGED SRA 2290 2 K250W 350W BRIDGED Features Compact full featured and versatile The SRA Series provides studio audio quality for project recording and live applications The operating instructions in this manual are for the SRA 2150 and SRA 2250 power amplifiers The operation and functions of these units are the same except as noted Convection cooled with no fan for quietest Operation e Single rack space 1U Calibrated 41 detent volume controls Headphone output with speaker disable switch for private monitoring Switchable Low Cut filters for eliminating Speaker rumble and resonance Switchable 2 4 8 ohm operation e Stereo mono bridged switch e 1 4 TRS and XLR balanced and RCA unbalanced inputs 1 4 and binding post banana jack speaker outputs e 115V 60Hz 230V 50Hz AC select switch Complete advanced safety and reliability features soft start turn on noise free on off built in DC offset short circuit and speaker protection built in current and signal voltage limiters Peak Power Protection and Signal LEDs for each channel SRA 2150 2 X 150W 4 ohms 250W mono bridged 8 ohms SRA 2250 2 X 250W 4 ohms 350W mono bridged 8 ohms Congratulations You have just purchased one of the finest professional power amplifiers on the market today This amp was developed using the exp
4. NDICATORS These LEDs illuminate if any section of the power amplifier s output is within 3dB of clipping Occasional blinking of these LEDs is acceptable but if they remain on more than intermittently you should turn down either the amplifier s level control or reduce the output level of the preceding component to avoid audible distortion 6 PROTECTION LED INDICATORS These LEDs illuminate when the unit is overheated or when a shorted load or DC is detected in the amplifier output When either of these LEDs is lit up turn OFF the power and check the output s connection to verify that it is correct then turn ON the power again The amplifier will reset itself when the problem is corrected 7 SIGNAL LEDS These LEDs illuminate to confirm the presence of an input audio signal at that channel of the amplifier 8 LEVEL CONTROLS These control the level of signal coming into each channel Turn these controls counterclockwise if the peak LEDs illuminate steadily indicating too strong an input signal 9 GROUND For safety and to help eliminate ground loop hum connect a properly grounded ground wire here Controls amp Connections 10 STEREO BRIDGE SELECT SWITCH This is used to select STEREO or BRIDGE mode operation Before switching verify that the output s connection is correct The connections should be as follows STEREO MODE a Mixer or EQ right channel line output to amplifier right channel line input b Mixer or EQ left chan
5. S PHONE JACK FOR EACH CHANNEL 47 KOHM BALANCED amp 40 KOHMS UNBALANCED OUTPUTS ONE 1 4 PHONE JACK amp ONE PAIR BINDING POST SCREW TERMINALS FOR EACH CHANNEL SRA 2150 RMS 150W X 2 4 OHMS BRIDGED RMS 250W 8 OHMS SRA 2250 RMS 250W X 2 4 OHMS BRIDGED RMS 350W 8 OHMS LOWEST OUTPUT LOAD IMPEDANCES STEREO 2 OHMS BRIDGED 4 OHMS FREQUENCY RESPONSE 5Hz 40KHz 0 5dB SIGNAL TO NOISE RATIO IEC A gt 94dB T H D 0 0596 INDICATORS POWER ON SIGNAL PEAK PROTECT COOLING CONVECTION NO FAN FUSE REQUIREMENTS 115 230 SRA 2150 5X20mm GLASS TUBE 5A SLOW BLOW SRA 2250 5X20mm GLASS TUBE 5A SLOW BLOW DIMENSIONS SRA 2150 2250 19 x 1 75 x 11 8 481 X 44 X 300mm 1U RACK HEIGHT WEIGHT SRA 2150 14 3 Ibs 6 5 Kg SRA 2250 16 5 lbs 7 5 Kg For improvement purposes specifications and design subject to change without prior notice SERVICE FOR YOUR NADY AUDIO PRODUCT U S Should your NADY AUDIO Product require service please contact the Nady Service Department via phone at 510 652 2411 or E mail at service nadywireless com INTERNATIONAL For service please contact the NADY AUDIO distributor in your country through the dealer from whom you purchased this product DO NOT ATTEMPT TO SERVICE THIS UNIT YOURSELF AS IT CAN BE DANGEROUS AND ALSO WILL VOID THE WARRANTY PA UJ NADY SYSTEMS INC 6701 SHELLMOUND STREET EMERYVILLE 94608 Tel 510 652 2411
6. ertise of professional sound engineers and working musicians You will find your new NADY AUDIO amp has superior performance and greater flexibility than any other amplifier in its price range Read this manual carefully to get the most out of your new unit Thanks for selecting NADY AUDIO for your choice in power amplifiers Date of Purchase Dealers Name City State Zip Model Serial Contents 1 Warning 2 Controls and Connections 3 4 Typical Set up 5 Specifications 6 INSTRUCTIONS PERTAININGTO A RISK OF FIRERLECTRIC SHOCK OR INJUR TO PERSONS An equilateral triangle enclosing a lightening flash arrowhead symbol is intended to alert the user to the presence of uninsulated dangerous voltage within the product s enclosure which may be of sufficient magnitude to constitute a risk of elec tric shock equilateral triangle enclosing an exclamation point is intended to alert the user to the presence of important operating and service instructions in the literature enclosed with this unit IMPOR TANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS WARNING When using electric products basic precautions should always be followed including the following 1 Read all the instructions before using the product 2 Do not use this product near wa
7. lified service personnel when A The power supply cord or the plug has been damaged or B Objects have fallen or liquid has been spilled onto the product or C The product has been exposed to rain or D The product does not appear to operate normally or exhibits a marked change in performance or E The product has been dropped or the enclosure damaged 11 Do not attempt to service the product beyond that described in the user maintenance instructions All other servicing should be referred to qualified service personnel This product may be equipped with a polarized line plug one blade wider than the other This is a safety feature If you are unable to insert the plug into the outlet contact an electrician to replace your obsolete outlet Do not defeat the safety purpose of the plug For use in the U S A IMPOR TANT THE WIRES IN THIS MAINS LEAD ARE COLORED IN ACCORDANCE WITH THE FOLLOWING CODE BLUE NEUTRAL BROWN LIVE As the colors of the wires in the mains lead of this apparatus may not correspond with the colored markings identifying the terminals in your plug proceed as follows The wire which is colored BLUE must be connected to the terminal which is marked with the letter N or colored BLACK The wire which is colored BROWN must be connected to the terminal which is marked with the letter L or colored RED Under no circumstances must either of the above wires be connected to the earth terminal of a three pin plug
8. nel line output to amplifier left channel line input c Amplifier right channel speaker output to speaker and right channel speaker to speaker d Amplifier left channel speaker output to speaker and left channel speaker to speaker MONO BRIDGED MODE a Mixer or EQ right channel line output to amplifier right channel line input b Amplifier right channel speaker output to speaker and left channel speaker output to speaker c Optional Connect a second speaker as above amplifier right channel speaker output to speaker and left channel speaker output to speaker 11 UNBALANCED INPUT JACKS RCA These jacks are compatible with unbalanced input from components with RCA output jacks 12 BALANCED INPUT CONNECTORS 1 4 TRS amp XLR These 1 4 TRS Tip Ring Sleeve phone jacks and XLR jacks are compatible with balanced input and are wired as Tip Pin 3 Cold Ring Pin 2 Hot and Sleeve Pin 1 Ground 13 IMPEDANCE SWITCHES Use these switches to select the proper speaker load impedance for each channel 2 4 or 8 Ohms 14 OUTPUT CONNECTORS 1 4 Phone Jack amp Binding Posts The speakers for each channel output can be connected either to the 1 4 phone jack or to the screw terminal binding posts banana jacks 15 AC VOLTAGE SELECTOR SWITCH Before plugging in the power cord check to see that the unit is set for the proper voltage for you area 115V 60Hz or 230V 50H
9. ter e g near a bathtub washbowl kitchen sink in a wet basement or near a swim ming pool etc 3 This product should be used only with a cart or stand that will keep it level and stable and prevent wobbling 4 This product in combination with headphones or speakers may be capable of producing sound levels that could cause permanent hearing loss Do not operate for a long period of time at a high volume level or at alevel that is uncomfort able If you experience any hearing loss or ringing in the ears you should consult aaudiologist 5 The product should be located so that its location or position does not interfere with its proper ventilation 6 The product should be located away from heat sources such as radiators heat vents or other devices including amplifiers that produce heat 7 The product should be connected to a power supply only of the type described in the operating instructions or as marked on the product Replace the fuse only with one of the specified type and size and with the correct rating 8 The power supply cord should 1 be undamaged 2 never share an outlet or extension cord with other devices so that the outlet s or extension cord s power rating is exceeded or 3 be left plugged into the outlet when left unused for a long period of time 9 Care should be taken so that objects do not fall into and liquids are not spilled through the enclosure s openings 10 The product should be serviced by qua
10. z 16 FUSE HOLDER amp POWER CORD CONNECTOR This fuse holder contains an AC primary fuse When this fuse blows replace it with the same type fuse size and power rating see SPECIFICATIONS If it continuously blows stop replacing the fuse and refer servicing to qualified personnel CAUTION After checking the AC supply voltage be sure that the correct fuse is in the fuse holder The cord connector is used to connect the AC power source to your power amplifier CAUTION DO NOT REMOVE THE CENTER GROUNDING PIN Typical Set up SPEAKER 9 3 cS ae 9 OP 2 E o i 200 oss SET TO STEREO 5 MIXER 9 e EQUALIZER R L LINE OUT SPEAKER 1 SPEAKER2 2 SPEAKERS o J T x 6 9 ojo a H Ow o Ek e 600 693 962 Os SPEAKER SET TO MONO 1 SPEAKER TT EER 9o e E Own e OX D e 5 SET MIXER C o R L LINE OUT Specifications INPUTS ONE XLR JACK amp ONE 1 4 TR
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