DSP 4x4 - Manual (Print).pub
Contents
1. 11 eeeeeee settee tte etter tte e ete eet eeeteee 12 3 Operation eee terete eee ee eee EE EEEE 13 3 1 Operation PreCaUtiOns ec ee eee rete 13 3 2 Controls and INGICATOLS eese eset tee ete eee eee eee etree 14 3 3 RS232 COMMANAS ov esseeeeeee crete settee eee eee e eee eee e eters 16 4 Troubleshooting ccc eee eet aeees 17 5 Technical Specifications ccc eees 18 6 Warranty Information 00 eet ee ees 19 6 1 Warranty SUMM Ary rrreeeee eee eee tee tte eter etter eeees 19 6 2 Return Procedure veveeccceeeeeee eset ee te settee sees ee ee tees aeees 19 7 ACCESSOLICS 101 001 ee ttn ter tetas 22 30 C0 C ESSE 23 1 Welcome Eg STEWARTAUDIO The Difference is Hear Congratulations on your purchase of the new Stewart Audio DSP 4x4 This unit has been designed and built to provide you with years of high quality audio performance and trouble free operation If after reading this manual you should have any questions concerning amplifier instal lation and operation please contact your Authorized Stewart Dealer or you may contact us directly using the contact information provided on the back of this manual 1 1 Features Your Stewart Audio DSP 4x4 is the result of years of experience in the design and manufacture of quality audio products As such it provides a combination of performance and operational benefits that simply can not be found in conventional audio products e2. 0x03 0x12 0x54 CHAN 0x03 0x12 0x10 0x10 0x03 0x12 0x11 0x11 0x03 0x12 0x12 0x12 0x03 1 The channel configuration is as follows 0x00 all channels 0x01 CH1 0x02 CH2 etc 2 The volume is in the range 0 100 expressed in hexadecimal This equates to a range of 0x00 0x64 16 4 Troubleshooting Problem No power LED indicator Procedure Ensure that only the provided 5VDC 1A power supply has been used and that it is connected to a live power outlet supplying 100 240VAC Problem No RS232 communication Procedure Ensure that the connections are done as specified in sec tion 2 5 Check that the communication is at 9600 baud Shorten the cable lengths to see if it affects the communication Problem No output on individual channel Procedure Refer to the DSP Control Center Software manual for instructions on using live mode to meter the signal in the DSP signal path If a condenser microphone is in use ensure phantom power is being supplied Check input connections see section 2 8 Check that the volume on the audio source is at a sufficient level 5 Technical Specifications Frequency Response THD N Signal to Noise Ratio Unweighted Crosstalk Input Sensitivity Input Impedance Balanced Unbalanced Phantom Phantom Power D A Conversion Current Draw Input Connectors Output Connectors LED Indicators Controls Serial Control Port Baud Rate amp Protocol USB Control Port USB Standards Program
3. 4 channels of digital signal processing e Configurable via USB Port e RS232 connection for remote control e 1 8 rack package e Made in the USA 1 2 Using this Manual In order to obtain maximum performance from your DSP 4x4 please take time to read this brief owner s manual and carefully follow the guidelines for connection and operation This manual provides you with the information necessary to safely in stall and operate your new DSP 4x4 in the most common scenarios If you find yourself requiring additional assistance please feel free to con tact your Authorized Dealer or you may contact us directly using the contact information provided on the back of this manual 2 Setup 2 1 Setup Precautions CAUTION Before installing your unit make sure that you have read the Important Safety Precautions at the begin ning of this manual 2 2 Product Installation The DSP 4x4 incorporates a number of different mounting options in order to fit your installation needs 2 2 1 Pole Mounting The DSP 4x4 has mount holes on the top of the unit which can be used with the AV Pole bracket available from Stewart Audio cur1 2 3 4 STEWART Part Number AV Pole t X q Ww Q 2 2 1 Universal Mount Installation The DSP 4x4 also has a universal bracket available which allows the unit to be mounted against a wall or under a table Two screws are included in the kit which will affix the bracket to the top of the unit Once this is
4. done two holes are available for mounting the unit where desired Part Number AV Bracket A CAUTION Use only the screws provided in mounting brackets to the unit Do not over tighten 2 2 3 Product Dimensions 6 2in 15 7cm DSP 4x4 0 AVN 1 72in 4 3cm CLIP1 2 3 4 4 0in 10 3cm 1 72in 4 3cm 2 3 Input Connections Your DSP4x4 is provided with a 3 pin Phoenix connector for each input This connector will accept both balanced or unbalanced connections however some modifications must be made for an unbalanced connec tion See the next two sections for instructions on connecting the DSP 4x4 to its input source 2 3 1 Balanced Connections When using a balanced input source and connector you must ensure that the hot cold and ground pins of the connector are matched up to the and ground pins of the DSP 4x4 s Phoenix connector respec tively Diagrams have been provided for standard XLR and TRS con nectors Please refer to the manual of your input source in case it does not follow the standard pin out Input Connector Female XLR Male TRS Input Connector 27 s Ground V Shield 2 3 2 Unbalanced Input Connections When using an unbalanced input source and connector a jumper must be added between the negative terminals and the ground terminals Once this has been done the unbalanced source can be connected to the positive and gro
5. lasting operation 2 All of the safety and operating instructions should be read before the am plifier is installed or operated Retain these instructions for future refer ence All instructions should be followed all warnings on the amplifier and in the operating instructions should be adhered to 10 11 The unit should be situated so that its location and position does not inter fere with its proper ventilation For example the unit must not be placed on a rug bed sofa or similar surface that impedes airflow across the chassis Airflow through the ventilation openings should be unobstructed This unit should not be used near water for example near a bathtub in a wet basement near a swimming pool etc This unit is intended to be operated in a controlled indoor environment Do not place the unit near heat sources such as radiators heat registers stoves or other appliances that produce heat The unit should only be connected to 120 240 VAC 50 60 Hz power sup ply Do not defeat the ground or polarization of the power plug Route power cord and other cables so that they are not likely to be walked on tripped over or stressed Pay particular attention to condition of cords and cables at plugs and at the point where they exit the amplifi er To prevent risk of fire or injury damaged cords and cables should be replaced immediately Clean the unit with a clean damp cloth Do not use solvents or abrasive cleaners Neve
6. the warranty period 3 years from date of purchase that are not a result of misuse The following actions will void your warranty e The power cord or AC plug has been damaged through misuse e The amplifier has been exposed to moisture or extreme tempera tures e The amplifier has been dropped items have been dropped on the amplifier or the enclosure has been damaged e The amplifier has been opened by the operator e The amplifier was improperly packaged when sending to the fac tory for repair resulting in damage e Any of the precautions or instructions found in this manual were not followed Damages resulting to the amplifier which are not covered under this warranty can be factory repaired at cost to the customer Use the con tact information below to initiate the repair process 6 2 Return Procedure This section includes the return procedures which must be followed in order to prevent processing delay or cost to the customer Please read the entire section before contacting Stewart Audio for returns 6 2 1 Return Authorization Number All returns to the factory for service must be accompanied by a Return Authorization RA number One can be obtained by contacting Stewart Audio at 209 588 8111 or via e mail at support stewartaudio com NOTE Any defective products received without an RA number will be returned to sender at their expense If Stewart Audio is unable to contact the sender in 14 days the mer chandise
7. will be considered scrap and may be disposed of 6 2 2 Shipment Instructions If Stewart Audio requests that you ship the defective product back to their service center please refer to the guide below To ensure prompt warranty service be sure to follow all instructions 1 Return Authorization RA is required for product being sent to the factory for service 2 See packing instructions in section 6 2 3 3 Ship the defective product using a method which provides for or der tracking or order confirmation The service center is located at the following address Stewart Audio 14397 Cuesta Court Suite D1 Sonora CA 95370 4 Use a bold black marker and write the RA number on three sides of the box 5 Record the RMA number for future reference The RA number can be used to check the repair status 6 2 3 Packaging Instructions Should Stewart Audio request that you ship your product to their ser vice center these instructions must be followed in order to ensure safe delivery If they are not followed Stewart Audio assumes no responsi bility for damaged goods and or accessories that are sent with your unit 20 6 2 3 Packaging Instructions cont 1 Please write the RA number on three sides of the box Include the Stewart Audio RA number inside the box and a brief description of the problem 2 You will be advised during the RA process what accessories should be included with the amplifier Power supplies connectors cor
8. Control Power Supply Input Construction Cooling Mounting Dimensions Weight Safety Environmental Warranty 18 20Hz 20kHz 0 2dB lt 0 007 gt 120dB at OdB gain lt 95dB 40dB to 3dB 20k Q 10k Q 2 4k Q 24VDC 25mA Software Controlled 24 bit 48kHz 400mA 5VDC 3 5 Euro Block 3 5 Euro Block Power Phantom Power Clip USB Programming RS232 Operation Bidirectional RS232 9600 baud 8 bits 1 stop bit no pari ty no flow control Front panel female mini USB B USB 2 0 Low Speed Stewart Audio DSP Control Center External in line 5VDC Included Aluminum Chassis Convection Cooling Universal Bracket Pole Mountable 1 7 4 3cm H x 6 2 15 7cm W x 4 0 10 3cm H 0 6lbs 0 3kg CE In Progress RoHS 3 years 6 Warranty Information 6 1 Warranty Summary All Stewart Audio amplifiers and accessories unless excluded in this summary are covered by a 3 year limited warranty on parts and labor from the data of purchase In order to be eligible for warranty repairs the amplifiers and accessories must have been purchased through an authorized Stewart Audio dealer and submitted by the original purchas er This warranty is only valid in the country in which the amplifier was purchased 6 1 1 Eligibility Requirements Stewart Audio warrants against all malfunctions which come as a result of component or manufacturer defect The amplifier is also covered from all failures which arise during
9. D indicator on the rear of the DSP 4x4 will illuminate CAUTION Microphones or other input devices which do not require phantom power can be permanently damaged by the application of phantom power Stewart Audio will not be held responsible for damage to these devices 2 4 Output Connections Your DSP 4x4 is provided with a 3 pin Phoenix connector for each out put This connector offers a balanced output to interface with the input of another device Connection methods for balanced and unbalanced outputs are identical as the methods for inputs as referenced in section 2 3 NOTE Early versions of the DSP 4x4 ship with different input and output pin configurations Pay careful attention to the silk screened labels on the rear of the unit 2 5 RS232 Connection Your DSP 4x4 can be controlled using the RS232 connection on the rear of the device For the available RS232 commands see section 3 3 All communications should be performed at 9600 baud 8 bits 1 stop bit no parity and no flow control v py TX ER Yo RX aS A NOTE TX and RX labelings are relative to the Stewart Audio Device 3 Operation 3 2 Controls and Indicators 3 1 Operating Precautions 1 Before use your DSP 4x4 must be configured to customize its op eration including input and output wiring hookup Improper wiring can result in damage to equipment or potentially harm to the opera tor Consult section 2 for setup instructions 2 Tampering w
10. The Difference is Hear DSP 4x4 STEWART cCLIP1 2 3 4 PHANTOM POWER S OUTPUT 1 OUTPUT 2 OUTPUT3 OUTPUT 4 INPUT1 INPUT2 INPUT3 INPUT 4 1 2 DSP 4x4 Owner s Manual September 2013 www stewartaudio com Important Safety Instructions Before using your Stewart Audio Inc Product please read this Own er s Manual carefully to ensure optimum trouble free performance WARNING TO REDUCE THE RISK OF ELECTRICAL SHOCK DO NOT EX POSE THIS AMPLIFIER TO RAIN OR MOISTURE DANGEROUS HIGH VOLTAGES ARE PRESENT INSIDE THE ENCLOSURE DO NOT OPEN THE CABINET REFER SERVICING TO QUALIFIED PERSONNEL ONLY CAUTION A A CAUTION TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE COVER OR BACK NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED SERVICE PERSONNEL The lighting bolt within arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of un insulated dangerous voltage within the product s enclosure that may be of sufficient mag nitude to constitute a risk of electrical shock to person The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance servicing instruction in the literature accompanying the appliance Important Safety Instruction Please Read Prior to Product Installation 1 Installation should be performed by a trained and licensed professional to insure safe and
11. ds etc This is dependent on the failure assessment 3 When shipping your amplifier it is important that it has adequate protection We recommend you use the original packing material when returning the product for repair If you do not have the origi nal box see number 4 4 If you provide your own shipping pack the minimum recommend ed requirements for materials are as follows a 275 P S I burst test Double Wall carton that allows for 2 inch solid Styrofoam on all six sides of unit or 3 inches of plastic bubble wrap on all six sides of unit b Securely seal the package with an adequate carton sealing tape c Do not use light boxes or peanuts NOTE Damage caused by poor packaging will not be covered under warranty 6 2 4 Payment of Non Warranty Repairs Payment for non warranty repairs must be submitted to Stewart Audio before the product will be returned to the customer 21 7 Accessories The following accessories are available from Stewart Audio for your amplifier All part numbers shown are Stewart Audio Part Numbers Mounting Brackets AV POLE Pole mount bracket for AV Series amplifiers AV BRACKET Universal mounting bracket for AV Series amplifiers Connection Adapters ADPT RCA Mono Female RCA to male Euroblock ADPT SUMRCA Stereo Female RCA to male Euroblock ADPT SUM35 Stereo Female 3 5mm to male Euroblock To purchase these accessories or to see the full Stewart Audio product lineup visit u
12. ith the circuitry or making unauthorized changes is DSP 4x4 STEWART not only dangerous but may also violate local regulations 3 Use care when making connections between the unit and the input or output equipment 3 CLIP1 2 3 4 NOTE Stewart Audio will not be held responsible for damage to your DSP 4x4 or connected equipment if the instructions in this manual are not followed NOTE For additional operating precautions please refer to Important Safety Instructions located on Page 2 PHANTOM POWER OUTPUT 1 OUTPUT 2 OUTPUT 3 OUTPUT 4 INPUT1 INPUT2 INPUT3 INPUT 4 1 2 3 4 RS232 8 USB 2 0 Connector 5 Output Connections 3 5mm Power LED 6 Input Connections 3 5mm 3 Clip Indicator LED 7 Phantom Power Indicator LED Power Connector 3 5mm 3 RS232 Connector 3 5mm 3 2 1 Controls The DSP 4x4 is configured entirely via USB programming An RS232 connection allows remote control of select functions see section 3 3 There is no power switch so the unit will remain on continuously when plugged in Due to the inherently low power consumption design there is no need for a sleep mode 3 2 2 Indicators The DSP 4x4 has 3 sets of LEDs to indicate power channel clipping and phantom power The green power LED on the front of the device will illuminate whenev er the unit is plugged in The red clip LED s will illuminate momentarily when the DSP has de tected that the signal is clipping within the proces
13. r pour any liquid on the unit When left unused for a long period of time the power cord should be unplugged form the outlet Damaged units requiring service should be repaired by a qualified service technician when The power cord or AC plug has been damaged Objects have fallen or liquid has spilled into the unit The unit has been exposed to rain or other moisture The unit does not appear to operate normally or exhibits a marked change in performance e The unit has been dropped or the enclosure damaged aon The user should not attempt to service the unit beyond that described in the operating instructions All other servicing should be referred to quali fied service personnel Table of Contents Important Safety INStrUCTIONS e eee etree eet e eet e eee ae erent eeees 2 Table Of CONTENtS eeeeeee eee e et tte eet e eee e eter teeter teaser teaser tear eres 4 1 Welcome 0 cei eerie errr ert 5 1 1 F AtUureS sree tte ee ttt tee te tteteeee tats 5 1 2 Using this Manual sessesessssessrresssssrensrrrnnennsnnrerrnnennnernenrenne 5 VARS Y 0 REECE EEE EOE SOOEESSEOOSEEOSEOOOOOOOSOOOOOSOEOOOOOOSSOS 6 2 1 Setup PreCAUtiONS eee reer eet eet e eee ertee eter aeees 6 2 2 Product Installation seseeseeeeee eee ee esse tere eeeeeeees 6 2 3 Input CONNECTIONS 1 eeeee teeter tte eet e tte e tte e ete e eter eteees 8 2 4 Output CONNECTIONS eee etter tte te ttre tte ete 12 2 5 RS232 COMME CTtION
14. s at www stewartaudio com 22 8 Notes For Your Record In the spaces provided below record the model and serial number located at the rear of your amplifier Retain this information for future reference 23 STEWARTAUDI The Difference is Hear oO 14397 Cuesta Court Suite D1 Sonora Ca 95370 Phone 209 588 8111 Fax 209 586 8113 www stewartaudio com
15. sing chain Unlike a power amplifier this does not mean that harm is being done to the unit if it is driven while clipping for an extended period of time Rather this light indicates that the signal is clipping and will appear distorted on the outputs because it has exceeded the available 24dB headroom availa ble on most processing blocks The green phantom power LED s will illuminate when 24VDC phantom power is being applied to a channel This is switched via the DSP Con trol Center Software For more information please reference the DSP Control Center Software manual 3 3 RS232 Commands Command Name and Description Hex Command VOLUME_UP_10 Increases volume by 10 on CHAN VOLUME_UP_5 Increases volume by 5 on CHAN VOLUME_DOWN_10 Decreases volume by 10 on CHAN VOLUME_DOWN_5 Decreases volume by 5 on CHAN VOLUME_DISCRETE Sets CHAN volume to VOL FORCE_MUTE_ON Turn mute off for CHAN FORCE_MUTE_OFF Turn mute on for CHAN MUTE_TOGGLE Toggle mute on CHAN CHANGE_PRESET_1 Change to preset 1 during operation CHANGE_PRESET_2 Change to preset 2 during operation CHANGE_PRESET_3 Change to preset 3 during operation FIRMWARE_VERSION Returns the current version in the for mat 0x12 0x46 0x56 0x03 0x02 OxXX OxYY 0x03 XX Version YY Revision 0x12 0x55 CHAN 0x03 0x12 0x75 CHAN 0x03 0x12 0x44 CHAN 0x03 0x12 0x64 CHAN 0x03 0x12 0x55 CHAN VOL 0x03 0x12 0x4D CHAN 0x03 0x12 0x6D CHAN
16. und terminals Please refer to the manual of your input source in case it does not follow the standard pin out For your convenience pre wired connectors are available for purchase see the next page for details T NOTE A jumper is required for connecting an unbalanced input Input Connector y G d fo RCA 4 ce F Shand A jumper has been added between the amp EREN negative terminals and ground eaund Input CONNEC S Male TS PS we ba P nad L A jumper has been added between the Ground negative terminals and ground Shield Pre wired unbalanced connectors are available for purchase from Stew art Audio The summing adapters will properly sum a stereo source for use with the mono input on the rear of the DSP 4x4 without causing sound cancellation Part numbers are found below the diagrams gt D gt ADPT RCA ADPT SUMRCA ADPT SUM35 Mono Stereo Stereo Female RCA Female RCA Female 3 5mm 2 3 3 Phantom Power The DSP 4x4 is designed with software selectable 24VDC phantom power on all 4 channels capable of supplying 25mA per channel This power level is sufficient to operate most condenser microphones in a typical DSP 4x4 application Phantom power can be switched on off via the Stewart Audio Control Center Software or using RS232 commands documented in section 3 3 When phantom power is being supplied on a channel the appropriate LE
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