Ashly SRA-Series User's Manual
Contents
1. 4 SRA Series Amplifier Operating Manual Ashly Audio Inc G47 Holt Road Webster NY 14560 9103 Toll Free 800 828 6308 Telephone 585 672 0010 FAX 585 872 0739 www ashly com All Trademarks referred to herein are the property of their respective owners R 042707 All Rights Reserved Rev 1 4 0306 Page 2 Important Safety Instructions 2 Introduction 3 The SRA Series 4 Physical Description 5 Installation 6 Operation 8 Troubleshooting 9 Spec Table 10 Dimensions 11 Warranty 12 This manual uses a Perpetual Table Of Contents Each page has a copy of the manual s contents in a gray box just like this one The section you are in will always be bold with the other sections grayed out The feature allows you to jump directly to another section without having to return to a Table Of Contents page Operator Manual SRA Series Amplifiers Important Safety Instructions Consignes de s curit lire attentivement This power amplifier can produce dangerous output voltage power and sound pressure levels In order to minimize the risk of injury damage or hearing loss please read the entire owners manual The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated dangerous voltage within the product s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to2. Requirements SRA Series amplifiers have specific physical electrical and signal requirements for proper operation These requirements will vary depending on your specific application setup and the settings on the amplifier When setting up and testing your system please take special care to double check all connections and settings Please refer to the specifications section of this manual for specific input output and other figures Installation Density SRA Series amplifiers produce substantial power output from a very small chassis When driven at the higher end of their potential they do produce heat that must be dissipated In cases where multiple SRA amplifiers are mounted together or a single SRA with other equipment it is recommended that a IRU space is left between units to allow for proper air circulation If the amplifier overheats it will go into thermal protect mode to prevent damage to itself and any connected components and speakers Copyright 2006 Ashly Audio Inc Operator Manual SRA Series Amplifiers Page Typical Applications Input From Source The most common use of a SRA Series amplifier is a 2 channel source driving 2 speaker channels In this illustration the 4 channel amplifier is receiving two stereo signals and is driving two pairs of stereo speakers The amplifier is in STEREO mode Input From Source a SRA Series amplifiers are well suited to BRIDGED operation to drive
3. 4 Physical Description 5 Installation 6 Operation 8 Troubleshooting 9 Spec Table 10 Dimensions 11 Warranty 12 Operator Manual SRA Series Amplifiers Limited Warranty Warranty service for this unit will be provided by ASHLY AUDIO INC in accordance with the following warranty statement ASHLY AUDIO INC warrants to the owner of this product that this product and the components thereof will be free from defects in workmanship and materials for a period of FIVE years from the date of purchase ASHLY AUDIO INC ASHLY AUDIO will without charge repair or replace at its option defective product or component parts upon prepaid delivery to the factory service department or authorized service center accompanied by proof of purchase date in the form of a valid sales receipt This warranty gives you specific legal rights and you may also have other rights which vary from state to state EXCLUSIONS This warranty does not apply in the event of misuse neglect or as a result of unauthorized alterations or repairs This warranty is void if the serial number is altered defaced or removed ASHLY AUDIO reserves the right to make changes in design or make additions to or improvements upon this product without any obligation to install the same on products previously manufactured Any implied warranties which may arise under the operation of State law shall be effective only for FIVE years from the date of purchase of the
4. Idle Current 0 30A 0 52A 0 35A 0 62A Frequency Response 20 Hz 20 kHz 1 0 dB Damping Factor 8 ohm load lt 1 kHz gt 200 into 8Q Input Impedance 20 kOhm balanced Maximum Input Level 21 dBu Input Impedance 20kQ balanced Cooling Convection Front Panel Indicators per channel Clip amp Signal Front Panel Indicators overall power standby protect Attenuators Per channel front panel Input Connectors each channel 3 Pin Euroblock Output connectors each channel Screw terminals Amplifier Protection Output Overcurent DC Output Mail Supply Rail Overvoltage Chassis Temperature Inrush Limiting Mains Fuse Power Cable Connector 3 Prong IEC Dimensions 19 xX 175 x 117 Weight 10 0 lbs 10 0 lbs All Specifications Subject to Change or Improvement Without Notice Copyright 2006 Ashly Audio Inc Operator Manual SRA Series Amplifiers Page 11 Amplifier Dimensions All SRA Series amplifiers share the same dimensional measurements acd 483 TT 1 757 44 45 mm D00 D00 D00 10 io Wii 279 40 mm J00 100 ipa 437 5 a ie Remote Power Connections inel 4 Ch 3 Outputs Ch 4 Standby Delay Ashly Audio Inc Em ote lo s See 1 0 Sec 2 0 Sec 4 0 Sec Remote Standby G N SB Close Switch to Power Down Open Switch to Power Up Remote Standby All Rights Reserved Rev 1 4 0306 Page 12 Important Safety Instructions 2 Introduction 3 The SRA Series
5. Congratulations on your purchase of an Ashly SRA Series amplifier The SRA Series is made up of powerful high efficiency lightweight amplifiers incorporating the latest technologies We are confident that you will be pleased with the high performance superb sound quality reliability and more About Ashly Ashly Audio was founded in 1974 by a group of recording engineers concert sound professionals and electronics designers The first products were elaborate custom consoles for friends and associates but business quickly spread to new clients and the business grew The philosophy we established from the very beginning holds true today to offer only the highest quality audio tools at an affordable cost to the professional user ensuring reliability and long life More than thirty years later Ashly remains committed to these principles Ashly s exclusive Five Year Worry Free Warranty remains one of the most liberal policies available on any commercial grade product The warranty covers every product with the Ashly brand name and is offered at no extra cost to you our customer FCC Compliance This device complies with part 15 of the FCC Rules Operation is subject to the following two conditions 1 This device may not cause harmful interference 2 This device must accept any interference received including interference that may cause undesired operation All Rights Reserved Rev 1 4 0306 Page 4 Operator Manual SRA Se
6. a speaker load such as a subwoofer or a more powerful stereo output on a 4 channel model This illustration shows a 4 channel SRA driving a Stereo signal in BRIDGED mode Connectors amp Polarity SRA Series amplifiers utilize two types of professional audio connectors For the inputs 3 pin Euroblock connectors are utilized with their polarity clearly marked on the amplifier s rear panel Outputs are via screw terminal connectors The polarity for these connectors is also clearly marked on the unit s chassis However polarity changes when the unit is operated in BRIDGED mode Be sure to read the Operation section of this manual for important information on the two operating modes All Rights Reserved Rev 1 4 0306 Page 8 Operator Manual SRA Series Amplifiers Operation The amplifier s On Off Switch is a rocker type switch located on the left side of the front panel Turning on the amplifier initiates start up by activating the inrush current limiter When using the remote On Off function the main On Off switch must remain in the On position See page 11 for more information on remote On Off connections NOTE The power switch does NOT isolate the appliance from mains Make sure the mains power socket or an alternative disconnect device is near by and easily accessible When the product is connected to mains the line filter and the input of the fuse are energized 2 Channel Stereo Mode In this mode the amplifier s c
7. pas exposer cet appareil pour pleuvoir ou l humidit Ne pas utiliser l appareil pres de l eau Le nettoyer a l aide d un tissus sec 8 Ne pas bloquer les ouvertures de ventilation installer selon les consignes du fabricant 9 Eloigner des sources de chaleur tel radiateurs fourneaux ou autres appareils qui produisent de la chaleur 10 Ne pas modifier ou amputer le syst me de la mise terre Une prise avec mise terre comprend deux lames dont une plus large ainsi qu une mise terre ne pas la couper ou la modifier Si la prise murale n accepte pas la fiche consulter un lectricien pour qu il remplace la prise desuete 11 Prot ger le cordon de secteur contre tous bris ou pincement qui pourraient l endommager soit a la fiche murale ou l appareil 12 N employer que les accessoires recommand s par le fabricant 13 Nvutiliser qu avec les syst mes de fixation chariots tr pied ou autres approuv s par le fabricant ou vendus avec l appareil 14 D brancher l appareil lors des orages lectriques ou si inutilis pendant une longue p riode de temps 15 Un entretient effectu par un centre de service accr dit est exig si l appareil a t endommag de quelque fa on si il a t expos la pluie l humidit ou s il ne fonctionne pas normalement ou qu il a t chapp PR eS oe Copyright 2006 Ashly Audio Inc Operator Manual SRA Series Amplifiers Page 3 Introduction
8. persons The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance instructions in the literature accompanying the device Read these instructions Keep these instructions Heed all warnings Follow all instructions To reduce the risk of fire or electric shock do not expose this apparatus to rain or moisture Do not use this apparatus near water 7 Clean only with dry cloth 8 Do not block any ventilation openings Install in accordance with the manufacturer s instructions 9 Do notinstall near any heat sources such as radiators heat registers stoves or other apparatus including amplifiers that produce heat 10 Do not defeat the safety purpose of the polarized or grounding type plug A polarized plug has two blades with one wider than the other A grounding type plug has two blades and a third grounding prong The wide blade or the third prong are provided for your safety If the provided plug does not fit into your outlet consult an electrician for replacement of the obsolete outlet 11 Protect the power cord from being walked on or pinched particularly at plugs convenience receptacles and the point where they exit from the apparatus 12 Only use attachments accessories specified by the manufacturer 13 Use only with the cart stand tripod bracket or table specified by the manufacturer or sold with the apparatus When a cart is
9. hannels operate fully independent of each other Each signal enters the unit and is amplified separately Bridged Mono Mode In this mode a single input is connected to channel 1 or 1 amp 3 in 4 channel models and is connected to the two output channels that have been Bridged together Each output channel processes the signal but the polarity of channel 2 and channel 4 in 4 channel models is reversed The single load is connected between the two positive channel outputs While the total output of the amplifier remains the same both the available output voltage and the minimum impedance that can be connected are doubled as compared with stereo operation Only Channel 1 or 1 amp 3 is active A signal feeding Channel 2 or 4 will have no effect on the output Copyright 2006 Ashly Audio Inc Operator Manual SRA Series Amplifiers Page 9 Troubleshooting No Sound Signal LED not lit Check AC plug Confirm that AC outlet works by plugging Clip LEDs not lit in another device Signal LED not lit Make sure the signal source is operating and try another cable Check position of Volume Pots Signal LEDs responding to signal level Check the speaker wiring for breaks Try another speaker and cable Protect LED is lit Overheating will cause protective muting Check for proper ventilation Distorted Sound Power LED is lit Pot eae Check the wiring and try another speaker Signal LEDs responding
10. ndby connector to be active This feature includes a 0 5 second turn on delay Delay Switches These switches provide additional turn on delay when the Standby connector is used The switches are additive providing as much as 7 5 seconds of delay to the 0 5 second Standby delay Mains Connector Connection to the mains is via this 3 Prong IEC connector WARNING Do not remove the mains connector ground It is illegal and dangerous All Rights Reserved Rev 1 4 0306 Page 6 Operator Manual SRA Series Amplifiers Installation SRA Series amplifiers are designed for use in both fixed and mobile sound systems Each amplifier is shipped unless otherwise specified with the following factory settings On Off Switch Off High Pass Filter s Off Attenuators oo Gain Selector 26 dB Mode Selector Stereo Before connecting to mains power make sure that the switches are set to the configuration needed for your particular application Always switch the amplifier off before making any changes to the settings Failure to do so could result in damage to the unit or other components in your system CAUTION When mounting or connecting the amplifier always disconnect it from the mains Use four screws and washers when mounting the amplifier to the front rack rails Rear support is also recommended especially for mobile or touring use To reduce the risk of fire or electric shock do not expose this apparatus to rain or moisture
11. nly Amplifier Rear Panel Channel 1 Channel 2 Ch1 Outputs Channel 3 ae Channel 4 or Page 5 Important Safety Instructions 2 Introduction 3 The SRA Series 4 Physical Description 5 Front Panel Rear Panel Installation 6 Operation 8 Troubleshooting 9 Spec Table 10 Dimensions 11 Warranty 12 Channel Attenuators amp LEDs These knobs adjust the attenuation of the input signal of each channel from to 0 The Sig LED will begin to light when the output voltage reaches approximately 0 3 volts When clipping occurs the Clip LED will light Terminals marked Orca He ac OC with ff are HAZARDOUS 1 3 Pin Euroblock Input Connectors These connectors are used for all input signals 2 Input Switches The HPF switch sets the High Pass Filter for each pair of channels channel to 80Hz or Off The Gain switch sets the amplifier gain to 36dB or 26dB sensitivity The Mode switch selects the amplifiers operating mode Bridge or Stereo 3 Screw Terminal Output Connectors These connectors provide the amplifiers output signal In Bridge Mode the even channel connector becomes the Bridged Channel LIVE External wiring to these terminals connectors requires installation by trained personnel or pre manufactured cables Standby Connector This 2 Pin Euroblock connector provides for remote standby switching The Power switch must be in the On position for the Sta
12. product Ashly Audio shall be liable only to correct defects in the product itself and not for any damage or injury which may result from or be incidental to or a consequence of such defect Some states do not allow either limitations on how long an implied warranty lasts or the exclusion or limitation of incidental or consequential damages so the above limitations or exclusions may not apply to you OBTAINING WARRANTY SERVICE For warranty service in the United States please follow this procedure 1 Return the product to Ashly freight prepaid with a written statement describing the defect and application the product is used in Ashly Audio will examine the product and perform any necessary service including replacement of defective parts at no further cost to you 2 Ship your product to Ashly Audio Inc Attn Service Department 847 Holt Road Webster NY 14580 9103 For units purchased outside The United States of America service will be provided by an authorized distributor of ASHLY AUDIO INC Copyright 2006 Ashly Audio Inc
13. remains The protect LED is lit as well as the clip LED of the affected channel s M Main supply rail overvoltage protection The amplifier is switched off if the main supply rails have too high of a voltage The amplifier will automatically restart after 5 seconds if no fault remains The protect LED is lit as well as the clip LED of the affected channel s M Chassis internal temperature monitoring The amplifier is switched off when the internal ambient temp reaches 70 C The amplifier will again switch on when the internal ambient temp reaches 55 C The protect LED is lit as well as the clip LED of ALL channels M Inrush limiting The turn on current is limited This is active during initial startup as well as when exiting standby mode M Mains fuse There is a 5 amp time delay fuse Copyright 2006 Ashly Audio Inc Operator Manual SRA Series Amplifiers Physical Description Each model in the SRA Series is IRU and weighs 9 pounds 2 Ch or 10 pounds 4 Ch They have the same physical design though there are obvious differences between two and four channel versions The model number is indicated on the left side of the front panel Amplifier Front Panel 1 Mounting Holes For rack mounting 2 Power Switch Switches the unit on or off 3 Status LEDs Indicate status of Power Standby and Protect 4 Air Inflow Vents Cool air enters here 5 Headphone Jack 2075 amp 2150 o
14. ries Amplifiers Important Safety Instructions 2 The SRA Series PLOS SRA Series amplifiers are high efficiency lightweight amplifiers incorporating the latest The SRA Series 4 amplifier technologies Protection Physical Description 9 The series provides a power range of 75 to 150 watts per channel at 4 ohms 20Hz 20kHz Installation 6 1 THD The SRA series is available in 2 and 4 channel versions at two power points All Operation 8 models will drive 4 or 8 ohm loads All models are IRU with the two and four channel versions weighing 9 pounds and 10 pounds respectively All SRA amplifiers utilize a state of the art efficient high speed switched mode power supply and offer remote power on off among the many standard features Troubleshooting 9 Spec Table 10 Dimensions 11 SRA Series Power Ratings per channel Stereo Mono Bridged 4Q Warranty 12 80 Input connections are via 3 pin Euroblock connectors e Output connectors are screw terminal strips e Rear panel switches include selectable High Pass Filters Gain and Operation Mode Protection SRA Series Amplifiers come standard with several protection circuits M Output over current protection The output current is limited to safe levels regardless of load M DC output protection The amplifier is switched off if more than 2 volts of dc is present on the output The amplifier will automatically restart after 5 seconds if no fault
15. to signal level The signal source might be clipping Keep the volume pots at least halfway up so that the source does not have to be overdriven Clip LEDs not lit Keep the volume pots at least halfway up and try changing input sensitivity with the gain selector on the rear Squeals and Feedback Squeals and Feedback Microphone feedback should be eliminated with mixer controls If noise continues to build up with no microphone gain there is a serious fault in the signal processors or cables Working in succession from the signal source towards the amplifier and check each device in the signal path by reducing its gain or by unplugging it All Rights Reserved Rev 1 4 0306 Page 10 Operator Manual SRA Series Amplifiers Spec Table SRA 2075 SRA 4075 SRA 2150 SRA 4150 Power Output Per Channel Stereo Mode all channels driven 8 ohms 20 Hz 20 kHz 1 THD 2 x 40W 4 x 40W 2 x 80W 4 x 80W 4 ohms 20 Hz 20 kHz 1 THD 2x75W 4x75 W 2 x 150 W 4 x 150 W Bridged Mono Mode 8 ohms 20 Hz 20 kHz 1 THD 1 x 150 W 2 x 150 W 1 x 300 W 2 x 300 W Spec Table 10 Signal to Noise 20 Hz 20 kHz unweighted gt 98 dB gt 98 dB gt 105 dB gt 105 dB Voltage Gain 26 dB 36 dB sensitivity selectable Output Circuitry Class D Class D Class D Class D Power Consumption Pink Noise 4 Ohm 1 8 Output 18 75W 37 5W 37 5W 75 0W 1 8 Draw 39 0W 74 0W 64 0W 125W 1 8 Current 0 69A 1 24A 1 10A 1 98A Idle Power 17 0W 30 0W 20 0W 36 0W
16. used use caution when moving the cart apparatus combination to avoid injury from tip over 14 Unplug this apparatus during lightning storms or when unused for long periods of time 15 Refer all servicing to qualified service personnel Servicing is required when the apparatus has been damaged in any way such as power supply cord or plug is damaged liquid has been spilled or objects have fallen into the apparatus the apparatus has been exposed to rain or moisture does not operate normally or has been dropped IPON 9 gt CAUTION RISK OF ELECTRIC SHOCK Cet amplificateur de puissance peut produire un voltage et une pression acoustique qui pourrait tre dangereuse ou pourrait meme causer des probl mes ou perte accuit auditive Consultez le manuel d instruction et observez les consignes Le symbole de la fl che dans un triangle quilateral symbolisant la foudre est pr vu pour sensibiliser l utilisateur la pr sence de tension de voltage non isol e l int rieur de l appareil Elle pourrait constituer un danger de risque de d charge lectrique pour les utilisateurs Le point d exclamation dans le triangle quilat rale alerte l utilisateur de la pr sence de consignes qu il doit d abord consulter avant d utiliser l appareil Lisez ces instructions Conservez ces instructions Observez les avertissements Suivez ces instructions Pour r duire le risque de feu ou la d charge lectrique ne
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