Nady Systems SPA 850 User's Manual
Contents
1. KA 1100 Stereo Power Amplifier 32dB cH B PROTECT PROTECT POWER 3248 cHA STEREO POWER AMPLIFIER Congratulations on your choice of stereo power amplifiers you have purchased one of the finest stereo amplifiers on the market to day This unit was developed using the expertise of professional sound engineers and working musicians You will find that your new NADY AUDIO XA 900 1100 has superior performance and greater flexibility than any other amplifiers in its price range Please read this manual carefully to get the most out of your new unit Thanks for selecting NADY AUDIO as your choice in stereo power amplifiers FEATURES Offering top power superior performance and full professional operating features in a roadworthy compact chassis the XA Series are perfect for even the most demanding sound reinforcement installation and touring applications The operating instruction in this manual are for the XA 900 and XA 1100 power amplifiers The operation and functions of these units are the same except as noted Full operating features detent volume controls parallel bal anced XLR and 1 4 TRS inputs stereo dual channel parallel input or bridged mono operating modes with selector switch binding post banana plug outputs ground lift switch Full safety reliability features 2 dual speed fans for cooling soft start turn on noise free on off built2. POWER SPECIFICATIONS XA 900 XA 1100 EIA OUT POWER 2Q 400 400 730 730 1HZ THD MAXIMUM 1 4Q 300 300 475 475 BOTH CHANNELS 8Q 200 200 300 300 Bridged 4Q 675 1100 ELECTRICAL SPECIFICATIONS XA 900 XA 1100 INPUT SENSITIVITY 1 15V 3 4dBU 1 15V 4dBU INPUT IMPENDANCE 10KQ Unbalanced amp Balanced FREQUENCY RESPONSE at 10dB below rated output power 20Hz 20KHz 1dB 3dB points 5Hz 50KHz VOLTAGE GAIN 32dB 34dB DISTORTION SMPTE 1M lt 0 03 lt 0 03 S N RATIO 100dB 100dB GENERAL SPECIFICATIONS XA 900 XA 1100 PROTECTIONS Full short circuit open circuit thermal ultrasonic and RF protection stable into reactive or mismatched loads ON OFF muting current limiter crowbar CONTROLS Front Power switch 40 dentent input level control for each channel Rear Parallel Mono Bridge selector ground lift switch AC voltage selector switch INDICATORS SIGNAL 2x green LED CLIP 2 x red LED POWER 2 x green LED PROTECT 2 x red LED CONNECTORS POWER IEC power cord jack INPUT Active balanced XLR and 1 4 6 3mm TRS OUTPUT Touch proof binding posts POWER SUPPLY Voltage selectable 110 120V or 220 240V AC 50 60Hz FUSES 3AG 20A 250V X2 DIMENSIONS 19 0 x 15 7 x 3 5 483 x 400 x 88 8mm WEIGHT 38 5lb 17 5Kg 41 8lb 18 8Kg The specifications above are correct at the time of printing of this manual For improvement purposes
3. Do not use the PARALLEL MONO switch when feeding the amp 2 separate signals Q A A a A CAUTION ur d Q A WO INPUTS BRIDGED PARALLEL STEREO e Bridged Mono Mode To put the amplifier in bridged mono mode turn the amplifier off and slide the MODE SELECTOR SWITCH 13 toward the top BRIDGED position and properly connect the input output wiring as shown The signal is input into CH A Keep the level control of channel B turned completely down counter clock wise Note Do not connect a speaker load of less than 4 ohms as it can damage your amplifier Note This mode produces a large amount of power Be sure that your wiring and speaker can handle it e puxo atome note i acm p sr Hda ruse D em e o ja optima doremi BRIDGED PARALLEL STEREO Do Not Use BLOCK DIAGRAM l indino ZHO gt ID indino 119 nd n UOI99 014 ndno UON98 01d i yndino uono louiud l JUSJINOIOAO i Jeudue Jamod Jeydue Jamod y uono loid U911N9 8A0 Jeudue obeyon 10 98 2p eunyesedwd Jeudue Bureau N3119 u01199 10 d 1O19919p s nyelsdwel Jeudue obeyon N9119 u01 99 01d E ule indu LH9 SPECIFICATIONS
4. all specifications for this unit including design and apperance are 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 telephone at 510 652 2411 or e mail at service nady 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 WILL ALSO VOID THE WARRANTY ahh UJ DLO IC NADY SYSTEMS INC 6701 SHELLMOUND STREET EMERYVILLE CA 94608 Tel 510 652 2411 Fax 510 652 5075 www nady com
5. CHOC ELECTRIQUE NE PAS OUVRIR CAUTION TO REDUCE THE RISK OF ELECTRIC SHOCK PER DO NOT REMOVE COVER OR BACK An equilateral triangle enclosing an exclamation point is intended to alert NO USER SERVICEABLE PARTS INSIDE the user to the presence of important operating and service instructions in REFER SERVICING TO QUALIFIED SERVICE PERSONNEL the literature enclosed with this unit IMPORTANT SAFETY INSTRUCTIONS When using this electronic device basic precautions should always be taken including the following 1 2 11 Read all instructions before using the product Do not use this product near water e g near a bathtub washbowl kitchen sink in a wet basement or near a swimming pool etc This product should be used only with a cart or stand that will keep it level and stable and prevent wobbling 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 a level that is uncomfortable If you experience any hearing loss or ringing in the ears you should consult an audiologist The product should be positioned so that proper ventilation is maintained The product should be located away from heat sources such as radiators heat vents or other devices including amplifiers that produce heat The product should be connected to a power supply only of the type described
6. connected equipment and always turn off your power amplifier before your other connected equipment 2 POWER LED INDICATORS These LEDs illuminate when the power is turned ON 3 CLIP PEAK LED INDICATORS These LEDs illuminate if any section of the power amplifier s output are within 3DB of clipping Occasional blinking of the LEDs are acceptable but if they remain on more than intermittently you should turn down either the power amplifier s level controls or KA 1100 Stereo Power Amplifier reduce the output level of the preceding component to avoid audible distortion 4 SIGNAL LED INDICATORS These LEDs illuminate to confirm the presence of an input signal greater than 100 mV at that channel of the amplifier 5 PROTECT LED INDICATORS These LEDs illuminate if the power amplifier s output connection is shorted or the load impedance is too low When either of these LEDs is lit up turn OFF the power and check the output s connec tion to verify that it is correct then turn ON the power again 6 LEVEL CONTROLS These control the level of signal coming into each channel The actual voltage gain of the amplifier is shown in dB Turn these controls counterclockwise if the peak LEDs illuminate steadily indicating too strong an input signal e 13 Le WF INPUTS BACK PANEL 7 POWER CONNECTOR The cord connector is used to connect t
7. damaged speakers resulting from improper wiring careless amplifier use or over powering UNBALANCED USE OF BALANCED USE OF MICROPHONE INPUTS MONO 1 4 PLUGS STEREO 1 4 PLUGS Tip hot Ground Screen Ring Cold cold Out of Phase Signal Sleeve Hot Ground Shield Sleeve In Phase Signal Ground Shield Socket female Plug male Tip Sleeve Strain relief clamp Strain relief clamp e Stereo Two Channel Mode To put the amplifier into stereo mode first turn the amplifier off then slide the MODE SELECTOR SWITCH 13 to the bottom STEREO position and properly connect the input output wiring as shown Note Do not connect a speaker load less than 2 ohms as it can damage your amplifier e e CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN BRIDGED rT INPUTS BRIDGED CHANNEL B PARALLEL STEREO FIEETEFOTETENT eel CONNECTIONS e Parallel Mono Mode To put the amplifier in parallel mono mode first turn the amplifier off then slide the MODE SELECTOR SWITCH 13 to the middle PARALLEL MONO position and properly connect the input wiring as shown A signal into any input jack will drive both channels directly You can patch the input signal on to any other amps using any of the remaining input jacks Note Do not connect a speaker load less than 2 ohms as it can damage your amplifier Note
8. in DC offset independent DC and thermal overload protection on each channel short cir cuit and speaker protection DC servo operation built in digital current limiter e Power ON Clip Signal and Protect LED indicators for each channel Roadworthy rugged double rack space 2U housing e 115 60Hz 230V 50Hz AC select switch and IEC power cord connector with built in fuse XA 900 2 x 300W O 40 2 x 400W O 20 Bridged mono 675W O 40 XA 1100 2 x 475W O 4Q 2 x 730W O 20 Bridged mono 1100W 4Q TABLE OF CONTENTS FEATURES nueansenussnsennnannunnnunnunnnunnnnnnunnnnnnnnnnnnnunnnnnnunnnnnnnnnnnnnnn 3 WARNING U uu uuu u 4 FRONT amp REAR PANEL CONNECTIONS 5 INSTALLATION 6 CONNECTIONS uu uu uu 7 BLOCK DIAGRAN uu u uu uuu u u u uu uuu QQ 9 SPECIFICATIONS u uuu u uu 10 Date of Purchase Dealer s Name City State Zip Model Serial An equilateral triangle enclosing a lightening flash arrowhead symbol is CAUTION intended to alert the user to the presence of uninsulated dangerous RISK OF ELECTRIC SHOCK voltage within the product s enclosure which may be of sufficient PO NOT OPEN magnitude to constitute a risk of electric shock ATTENTION RISQUE DE
9. in the operating instructions or as marked on the product Replace the fuse only with one of the specified type size and correct rating 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 and 3 never be left plugged into the outlet when not being used for a long period of time Care should be taken so that objects do not fall into and liquids are not spilled through the enclosure s openings The product should be serviced by qualified service personnel if A The power supply cord or the plug has been damaged B Objects have fallen into or liquid has been spilled onto the product C The product has been exposed to rain D The product does not appear to operate normally or exhibits a marked change in performance E The product has been dropped or the enclosure damaged Do not attempt to service the product beyond what is described in the user maintenance instructions All other servicing should be referred to qualified service personnel FRONT amp REAR CONNECTIONS FRONT PANEL 1 POWER SWITCH To turn the unit ON or OFF press the upper or lower portion of this button Before turning on the amplifier check all connections and turn down the level controls A momentary muting is normal when turning the amplifier on or off Caution Always turn on your power amplifier last after all your other
10. The 1 4 TRS phone jacks can also be used for unbalanced inputs For TRS phone plugs simply connect the unused side of the balanced input to ground For 1 4 TS phone plugs no change is necessary for compatibility with this input Balanced input signals are recommended as they are less prone to AC hum For long cable runs a source of less than 600 ohms output impedance is needed to avoid signal loss For short cable runs an unbalanced signal input should be suitable For stereo two channel operation use the inputs for both CH A and CH B for parallel or bridged mono operation use only CH A input See MODE SELECTOR SWITCHES below for more explanation 13 MODE SELECTOR SWITCH The XA Series amplifiers offer 3 modes of operation PARALLEL STEREO amp BRIDGED Slide the switch to one of the three positions for you application PARALLEL MONO INPUT This mode allows both chan nels to operate in parallel with the same signal and without requiring a Y cord In this mode the inputs for both channels are internally connected so that you only need to feed a signal into one of the channels This still allows independent control of each channel Note Do not select this Parallel mode when feeding the amplifier 2 separate signals Note Do not use both unbalanced and balanced cables in the same set up as that can unbalance the connections resulting in hum STEREO INPUT This is the most common mode generally used and allows
11. he AC power source to your power amplifier CAUTION DO NOT REMOVE THE CENTER GROUNDING PIN 8 FUSES Fuse holders for 20A 250V 3AG fuses If these fuses continuously blow shut off the unit and have it serviced by qualified service personnel 9 GROUND LIFT SWITCH Switch to right to disconnect the chassis from ground if neces sary to eliminate hum caused by ground loops 10 AC VOLTAGE SELECTOR SWITCH Before plugging in the power cord check to see that the unit is set for the proper voltage for your area 115V 60Hz or 230V 50Hz A cover plate is provided to ensure that this switch is not accidently reset or tampered with between uses FRONT amp REAR CONNECTIONS 11 L R CHANNEL OUTPUT CONNECTORS Connections are as depicted on the rear panel and in the follow ing CONNECTIONS section on page 7 of this manual 12 BALANCED INPUT CONNECTORS 1 4 TRS amp XLR These 1 4 6 3mm TRS Tip Ring Sleeve phone jacks and XLR jacks are compatible with balanced inputs and are wired as Tip Pin 3 Ring Pin 2 and Sleeve Pin 1 Ground Normal maximum input level at clipping is 1 15V RMS 4dB Input impedance is 10K Ohms Since the TRS phone jacks and XLR jacks are wired internally in parallel you can parallel this unit with another amplifier by using either the LINE 1 4 jack or the XLR jack depending on which you re using to input your signal to output the signal to the input jack of the other amplifier
12. independent control of 2 separate signals such as stereo playback main and monitor live mixes and bi amp operation highs in one channel and lows in the other BRIDGED MONO This mode combines the power of both channels to drive a single speaker In this mode the amp produces 4 times the peak power and 3 times the sustained power into a 4 or 8 ohm speaker than each channel can deliver separately in stereo or parallel mode CAUTION In this mode the amplifier can deliver high power into a speaker Make sure that the speaker connectors and wiring can handle this output Note that for prolonged overdriven outputs into a 4 ohm speaker the breaker may trip so care must be taken not to overload the amplifier in such operation Connect the input signal to CH A input for bridged mono operation 14 FANS The two dual speed fans switch between idle speed and high speed automatically to maintain the proper internal operating temperature INSTALLATION To ensure years of enjoyment from your NADY AUDIO XA 900 1100 please read and understand this manual thoroughly before using the unit INSPECTION Your XA 900 1100 was carefully packed at the factory in packag ing designed to protect the units in shipment Before installing and using your unit carefully examine the packaging and all contents for any signs of physical damage that may have occurred in transit Note Nady Systems is not responsible for shipping damage If the unit i
13. s damaged do not return to us but notify your dealer and the shipping company immediately to make a claim Such claims must be made by the consignee in a timely manner CONTENTS e Instruction manual e XA 900 1100 verify that the unit s serial number is same as shown on shipping carton e AC Power cord e Warranty Card RACK MOUNTING The XA Series amplifiers are designed for standard 19 rack mounting as well as stack mounting without a cabinet Use 4 screws and washers for mounting to the front rack rails It is also a good idea to support the amps also in the rear especially for mobile use where the amps will be subjected to shocks AMPLIFIER COOLING Also pay close attention to the cooling requirements Never block the air vents in the back side and front of the amplifier if the load seen by amplifier is less than 4 ohms and the amplifier is being run at high output levels For best results in such high output power applications you should augment the amplifier s air flow with a rack cooling system CONNECTIONS The following instructions describe the most common ways to install your amplifier into a sound system 1 Turn off the amplifier power switch before making any connections 2 The XA Series amplifiers maybe operated in one of three modes stereo bridged mono and parallel mono Refer to the following wiring diagrams for the speaker connections you wish to make Note Nady Systems assumes no liability for
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