Nady Systems SPA 1400 Stereo Amplifier User Manual
Contents
1. Serial 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 electric shock CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN ATTENTION RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR CAUTION TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE COVER OR BACK NO USER SERVICEABLE PARTS INSIDE An 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 REFER SERVICING TO QUALIFIED SERVICE PERSONNEL IMPORTANT SAFETY INSTRUCTIONS When using this electronic device basic precautions should always be taken including the following 1 Read all instructions before using the product 2 Do not use this product near water e g near bathtub washbowl kitchen sink in a wet basement or near a swimming 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 a level that is uncomfortable If you experience any hearing loss or ringing in the2. amplifier use or over powering Input Wiring Tips 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 up Tip Ring ee 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 center 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 CHANNEL B Bir x i CHANNEL A 1 he EX n iu SS a ee ee ji E PERSE Eee CHANNEL B PIN ie Note You can also connect channel outputs to the Channel A Speakon Ch A Pin2 ChB 1 and Ch A Pin2 Ch B Pin1 CHANNEL A PIN 1 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 left PARALLEL MONO position and properly connect the input output 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 suing any of the remaining input jacks Note Do not con
3. ears you should consult an audiologist 5 The product should be positioned so that proper ventilation is maintained 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 size and 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 and 3 never be left plugged into the outlet when not being used 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 qualified service personnel if The power supply cord or the plug has been damaged Objects have fallen into or liquid has been spilled onto the product The product has been exposed to rain The product does not appear to operate normally or exhibits a marked change in performance The product has been dropped or the enclosure damaged 11 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 moomugz FRONT AND REAR CONTR
4. 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 LF FILTER 30HZ SWITCH The low frequency LF filter rolls off frequencies below 30Hz when this switch is turned to the ON position This filter improves the audio by limiting unwanted inaudible low frequency speaker cone movement Unless a preceding device such as a mixer already has such a 30Hz roll off this filter should generally be employed for optimum audio and to protect your speaker from excessive cone excursions beyond its rated limit at sub audio frequencies Generally this switch should only be left OFF if you are monitoring the whole signal for frequency content such as for studio playback 15 FAN The fan speed is varied continuously automatically to maintain the proper internal operating temperature Rear to front airflow keeps amps and racks cool Rack Mounting The SPA Series amplifiers are designed for standard 19 rack mounting as well as st
5. 1 8lb 19Kg The specifications above are correct at the time of printing of this manual For improvement purposes all specifications for this unit including design and appearance 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 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 WILL ALSO VOID THE WARRANTY NADY SYSTEMS INC 6701 SHELLMOUND STREET EMERYVILLE CA 94608 Tel 510 652 2411 Fax 510 652 5075 www nadywireless com
6. OLS SPA 2404 STEREO POWER AMPLIFIER PO e TM 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 connected equipment and always turn off your power amplifier before your other connected equipment 2 POWER LED INDICATOR This LED illuminates when the power is turned ON 3 CLIP PEAK LED INDICATORS These LEDs illuminate if any section of the power REAR PANEL 6 CIRCUIT BREAKER A bimetallic circuit breaker is provided for protection of the amplifier Press to reset if it trips If it continuously trips upon resetting refer servicing to qualified personnel 7 POWER CONNECTOR The cord connector is used to connect the AC power source to your power amplifier CAUTION DO NOT REMOVE THE CENTEH GROUNDING PIN 8 GROUND LIFT SWITCH owitch to right to disconnect the chassis from ground if necessary to eliminate hum caused by ground loops CHANNEL 18 20 22 513 164 T 24 ad 12 26 6 28 00 30 CHANNEL A 20 18 22 cLP sG 1 T 24 LL t 26 8 6 2 lt n amplifier s output are withi
7. Y INPUT IMPEDANCE FREQUENCY RESPONSE at 10dB below rated output power VOLTAGE GAIN DISTORTION SMPTE 1M S N ratio GENERAL SPECIFICATIONS PROTECTIONS CONTROLS INDICATORS CONNECTORS POWER SUPPLY FUSES AC Primary Rear Panel Breakers AC Secondary Internal Fuses DIMENSIONS WEIGHT SPA 850 SPA 1400 SPA 2400 20 425 800 1400 750 750 500 500 Bridgedso 600 100 1600W 40 2400 SPA 850 SPA 1400 SPA 2400 1 15V 3 4dBU 1 15V 3 4dBU 1 15V 4dBU 10KQ Unbalanced amp Balanced 25Hz 25KHz 0 1dB 3dB points 5Hz 50KHz 30dB 32dB 34dB lt 0 03 lt 0 03 1009 850 1400 2400 Full short circuit open circuit thermal ultrasonic RF protection stable into reactive or mismatched loads ON OFF muting current limiter crowbar Front Power switch 40 detent input level control for each channel Rear Parallel Mono Bridge selector 30Hz filter selector clip ON OFF selector ground lift switch AC voltage selector switch AC breaker SIGNAL 2 x green LED CLIP 2 x red LED POWER 1 green LED POWER IEC power cord jack INPUT Active balanced XLR and 1 4 6 3mm TRS OUTPUT Touch proof binding posts SPEAKON Connectors Voltage selectable 110 120V or 220 240V AC 50 60Hz 11A 15A 10A 250V 3AG 12A 250V 3AG Fast Blow x 2 Fast Blow x 2 19 0 x 15 7 x 3 5 483 x 400 x 88 8mm 29 916 13 6Kg 34 30 15 6Kg 20A 25A 250V 3AG Fast Blow x 2 4
8. ack 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 Since the airflow is from the rear to the front it is important to keep both the inlet in the rear and the output in the front clear of obstructions to enable efficient cooling airflow Since the amp exhausts to the front it does not contribute to heat buildup in the rear of the rack It is important however that the other devices used in the rack allow plenty of cool air in the rear to enable proper cooling of the amp Never block the air vents in the sides 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 Internal Fuse Protection Each of the SPA Series amplifiers has backup internal fuse protection on each channel on the secondary output circuitry of the power transformer In almost all cases of power overload the external back panel circuit breaker which is wired in the primary power input circuit of the power transformer will trip before the internal fuses blow Nevertheless these fuses are valuable in that they can sometimes iso
9. ible 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 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 13 MODE SELECTOR SWITCHES below for more explanation 12 CLIP LIMITER SWITCH This switches the internal Clip Limiter ON or OFF for both channels The limiter prevents excessive signals from overloading the amplifier and thus flattening the peaks of the waveform and introducing distortion by automatically lowering the amplifier gain to minimize overd
10. late the problem to a single channel allowing operation of the other channel Also because they require added effort to rectify they increase the vigilance of the operator in correctly eliminating the cause of the overload problem before further use These fuses are located inside the units and require removal of the top of the chassis CAUTION Never open the unit when connected to AC power as you can be severely shocked resulting in serious injury or even death Please wait at least 5 minutes after disconnecting the unit from AC power to let any internal capacitors discharge before opening Replace the fuse with the same type size and power rating as noted in the illustration for your SPA Series amp If it continuously blows stop replacing the fuse and refer servicing to qualified personnel Internal Fuses for SPA 850 1400 SPA 850 10A 250V x2 SPA 1400 12A 250V x2 both 3AG Fast Blow Internal Fuses for SPA 2400 SPA 2400 25A 250V x2 both 3AG Fast Blow 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 SPA 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 damaged speakers resulting from improper wiring careless
11. n 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 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 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 9 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 10 L R CHANNEL OUTPUT CONNECTORS Speakon amp Binding Posts The Speakon and binding post banana jack outputs are compatible with a speaker load of 2 or greater 40 greater for bridged operation Connections are as depicted on the rear panel and in the following CONNECTIONS section on page 8 of this manual FRONT AND REAR CONTROLS 11 BALANCED INPUT CONNECTORS 1 4 TRS amp XLR These 1 4 6 3mm TRS Tip Ring Sleeve phone jacks and XLR jacks are compat
12. nect a speaker load less than 2 ohms as it can damage your amplifier Note Do not use the PARALLEL MONO switch when feeding the amp 2 separate signals amplifier s r3 CHANNEL um Fad bas CHANNEL B m E m cB m PIN 1 Note You can also connect both channel outputs to the Channel A Speakon ChA Pin2 ChB 1 and ChA Pin2 Ch B Pin1 CHANNEL A PIN 1 PIN 1 Bridged Mono Mode To put the amplifier in bridged mono mode turn the amplifier off and slide the mode selector switch 13 toward the right 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 Use 4 a Err DT T T E M ua Do Not Use This Speakon for Bridge Mode CHANNEL A PIN 1 1 E E E m AT gi SPECIFICATIONS POWER SPECIFICATIONS EIA out power 1Hz THD maximum 1 Both channels ELECTRICAL SPECIFICATIONS INPUT SENSITIVIT
13. on noise free on off built in DC offset independent DC and thermal overload protection on each channel short circuit and speaker protection DC servo operation built in current limiter Parallel outputs allow daisy chaining amps e 115V 60 2 230 50Hz AC select switch Clip and Signal LED indicators for each channel Durable double rack space 2U steel casing e SPA 850 2 x 350W 040 2 425W 920 Bridge mono 600W 8Q 850W 9 40 SPA 1400 2 x 500W 4Q 2 800W 220 Bridge mono 1000W 9 89 1400W 9 40 SPA 2400 2 x 750W 4Q 2 x 1400W 220 Bridge mono 1600W 9 89 2400W 9 40 Congratulations on your choice of stereo power amplifiers you have purchased one of the finest stereo amplifiers on the market today This unit was developed using the expertise of professional sound engineers and working musicians You will find that your new NADY AUDIO SPA 850 1400 2400 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 amplifiers FEATURE c 3 Lc 4 FRONT AND REAR CONTROLS 5 INSTALLATION 7 CONNEG 2 Ea 8 BLOCK DIAGRAM a 10 SPECIFICATIONS Date of Purchase Dealer s Name City State J Model
14. pe wu lt STEREO POWER S A 850 AMPLIFIER ane ER i SIG cuP sig us Ce SPA 1400 wii PTL cranes 7 amy 2 STEREO POWER AMPLIFIER zw SS A cup sG 15 5168 1 I POWER STEREO POWER AMPLIFIER gt 94 gt lt TI TT mx Th foo WENT Ful ED E Fd EN Offering top power superior performance and full professional operating features in a roadworthy compact chassis the SPA Series are perfect for even the most demanding sound reinforcement installation and touring applications The operating instruction in this manual are for the SPA 850 SPA 1400 and SPA 2400 power amplifiers The operation and functions of these units are the same except as noted Continuously variable speed fan with back to front air flow Full operating features user defeatable clip limiter switchable 30Hz low cut filter balanced XLR and 1 4 TRS inputs detent volume controls stereo dual channel parallel input or bridged mono operating models with selector switch binding post and Neutrik Speakon outputs ground lift switch Complete advanced safety reliability features soft start turn
15. rive This limiting is primarily used to protect full range speakers from high frequency distortion or damage to the horns caused by bass overdrive However when driving a subwoofer defeating the limiter can produce a desired extra punch to bass instruments such as kick drums 13 MODE SELECTOR SWITCH The SPA 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 channels 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 It also enables easy daisy chaining with other amps by using the other set of input connectors 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 all the connections when daisy chaining resulting in hum e STEREO INPUT This is the most common mode generally used and allows 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
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