USER MANUAL
Contents
1. Operating the 905 Power Amplifier 7 1 3 Mixing the Input Signals 7 2 You can mix the input signals using the two INPUT SELECTOR buttons To mix the signals do the following 1 Press the selected input twice The other input button illuminates and both buttons enter the mixing mode 2 Press and hold the selected input button for 2 or 3 seconds until it blinks 3 Press the up and down arrows to adjust the mixing rate between the inputs To exit the mixing mode press the selected input Using the Audio Control Program The 905 Audio Control Program allows you to adjust the volume and to operate equalization controls for treble mid level and bass that cannot be adjusted from the front panel To use the Audio Control Program 1 Download and install the program on your PC from the Kramer Web site 2 Connect the PC to the 905 see section 6 1 3 Open the Audio Control program The Audio Control window appears see Figure 3 4 Connect the 905 to the correct COM port of the PC 5 Choose an input line 1 or 2 6 Make volume equalization and balance adjustments by operating the sliders in the window 7 Turn loudness On and Off by checking or unchecking the Loudness checkbox Operating the 905 Power Amplifier a 905 Audio Control Connected to 5 Com COM5 Disconnect Volume Middle Treble 20 Mute Input O Im Loudness2. Kramer rack supplied indirectly when the power cord is not adapter kit for a machine that is plugged directly into the socket in the wall for not 19 see the Rack Adapters example when using an extension cable ora user manual for installation power strip and that you use only the power instructions available from cord that is supplied with the machine http www kramerelectronics com KRAMER SIMPLE CREATIVE TECHNOLOGY Connecting the 905 Power Amplifier 6 Connecting the 905 Power Amplifier To connect the 905 as illustrated in the example in Figure 2 do the following 1 Connect an unbalanced stereo audio source for example the unbalanced output of the DVD 1 player to the L and R INPUT 1 RCA connectors 2 Connect a balanced stereo audio source for example the balanced stereo audio output of the DVD 2 player to the INPUT 2 terminal block connector 3 Connect the OUTPUT terminal block to a pair of loudspeakers Connect the L and the L terminal block connectors to the left loudspeaker and the R and the R terminal block connectors to the right loudspeaker Do not ground the loudspeakers 4 Connect the power cord to the power socket and connect the cord to the mains electricity not shown in Figure 2 5 Ifrequired connect a PC and or controller to the RS 232 port see section 6 1 DVD Speakers Figure 2 Connecting the 905 Power Amplifier Operating the 905 Power Amplif
3. VOL Read simple audio VOLUME VOLUME VOLUME level Short form VOL Advanced commands for controlling each stage of audio amplification Set audio bass level BASS CHANNEL BASS BASS CHANNEL BASS Short form ADB CHANNEL RESULT Read audio bass level BASS CHANNEL BASS CHANNEL BASS Short form ADB CHANNEL Set audio treble level TREBLE CHANNEL TREBLE TREBLE CHANNEL TREBLE Short form ADT CHANNEL fTREBLE RESULT Read audio treble TREBLE CHANNEL TREBLE CHANNEL TREBLE Short form ADT CHANNEL Set audio midrange MIDRANGE CHANNEL RANGE MIDRANGE CHANNEL Short form ADM CHANNEL RANGE MID_RANGE RESULT Read audio midrange MIDRANGE CHANNEL MIDRANGE CHANNEL Short form ADM CHANNEL Set audio loudness LOUDNESS CHANNEL LOUDNESS LOUDNESS Short form ADS LOUDNESS LOUDNESS RESULT Read audio loudness LOUDNESS CHANNEL LOUDNESS CHANNEL Short form ADS CHANNEL LOUDNESS Mute audio MUTE MUTE MODE MUTE MUTE MODE RESULT Read audio mute state MUTE MUTE MUTE MODE Set balance mode BALANCE OUT CHANNEL BALANCE LEVEL BALANCE OUT CHANNEL BALANCE LEVEL RESULT Read balance mode BALANCE OUT CHANNEL BALANCE OUT CHANNEL IBALANCE LEVEL Parameter Description STAGE IN OUT or numeric value of present audio processing stage For example 0 for input leve
4. for adjusting the volume and a mute button e unbalanced stereo input RCA connectors and a balanced stereo input on a terminal block e AnRS 232 port Control your 905 e Directly via the front panel push buttons e By RS 232 serial commands transmitted by a touch screen system PC or other serial controller The 905 is housed in a 19 1U enclosure and is powered by a universal AC power supply To achieve the best performance Use only good quality connection cables to avoid interference deterioration in signal quality due to poor matching and elevated noise levels often associated with low quality cables e Avoid interference from neighboring electrical appliances that may adversely influence signal quality and position your Kramer 905 away from moisture excessive sunlight and dust 4 Your 905 Power Amplifier Figure 1 and Table 1 define the 905 1 Available from Kramer Electronics on our Web site at http www kramerelectronics com 3 Your 905 Power Amplifier Power Amplifier 6 8 9 INPUT4 000000000000000C LEFT RIGHT INPUT 2 SPKR OUT RS232 L L GR R b Lb Re R 3300 CLOW Y 2000 Figure 1 905 Power Amplifier KRAMER SIMPLE CREATIVE TE
5. 0D ILF Line feed ASCII 10 0x0A ISP Space ASCII 32 0x20 9 7 2 Command Terms Command A sequence of ASCII letters A Z a z and Command and parameters must be separated by at least one space Parameters A sequence of alphameric ASCII characters 0 9 A Z a z and some special characters for specific commands Parameters are separated by commas Message string Every command entered as part of a message string begins with a message starting character and ends with a message closing character 14 KRAMER SIMPLE CREATIVE TECHNOLOGY 905 Commands in Protocol 3000 9 7 3 9 7 4 9 7 5 Note A string can contain more than one command Commands are separated by a pipe character Message starting character For host command query For machine response Device address Optional for K NET K NET Device ID followed by Query sign follows some commands to define a query request All outputs sign defines all outputs Message closing character For host messages carriage return ASCII 13 CRLF For machine messages carriage return ASCII 13 line feed ASCH 10 Command chain separator character When a message string contains more then one command a pipe character separates each command Spaces between parameters or command terms are ignored Entering Commands You can directly enter all commands using a terminal
6. 8 F machine 3 on each side and Storage humidity range 5 to 95 RHL non condensing replace those screws through the ear brackets O CAUTION When installing on a 19 rack avoid hazards by taking care that 1 Itis located within the recommended environmental conditions as the operating ambient temperature of a closed or multi unit rack assembly may exceed the room ambient temperature 2 Once rack mounted enough air will still flow around the machine 3 The machine is placed straight in the correct horizontal position 2 Place the ears of the machine against the rack rails and insert the er proper screws not provided 4 You do not overload the circuit s When through each of the four holes in connecting the machine to the supply circuit the rack ears overloading the circuits might have a detrimental effect on overcurrent protection and supply e In some models the front panel wiring Refer to the appropriate nameplate may feature built in rack ears ratings for information For example for fuse e Detachable rack ears can be replacement see the value printed on the removed for desktop use product label e Always mount the machine in the 5 The machine is earthed grounded in a rack before you attach any cables reliable way and is connected only to an or connect the machine to the electricity socket with grounding Pay particular Power attention to situations where electricity is Ifyou are using
7. Balance b Figure 3 Audio Control Window 7 3 Using Serial Commands To operate your device using serial commands you need to install Kramer s control software that can be downloaded from the Kramer Electronics Web nal site For an explanation of all control commands see section 9 1 Download control software from our Web site at http www kramerelectronics com 10 KRAMER SIMPLE CREATIVE TECHNOLOGY Technical Specifications 8 Technical Specifications 905 technical specifications are shown in Table 2 Table 2 905 Technical Specifications INPUTS 1 unbalanced stereo audio input on RCA connectors 1 balanced stereo audio input on a 5 pin terminal block connector OUTPUTS 1 speaker stereo audio output on a 4 pin terminal block connector INPUT SENSITIVITY 80 320mVpp unbalanced 690mVpp balanced 40 220mVpp unbalanced 780mVpp balanced OUTPUT POWER 40 W per channel into 8Q 80W per channel into 40 MAX VOLTAGE GAIN 80 44dB unbalanced 37dB balanced 40 4648 unbalanced 34dB balanced OUTPUT MUSIC POWER 300W per channel into 40 BANDWIDTH 3dB gt 20kHz S N RATIO 93dB CROSSTALK 55dB 1kHz 43dB 20kHz CONTROLS Bass 8 5dB to 12 5dB 100Hz mid 9dB to 13dB 1kHz treble 8dB to 12 5dB 10kHz balance 12dB to OdB volume lt 35dB to 35dB 1kHz ADDITIONAL CONTROLS Loudness 9dB 500Hz 9dB 1kHz 8 5dB 15
8. CHNOLOGY Your 905 Power Amplifier Table 1 905 Power Amplifier Functions Feature Function 1 INPUT SELECTOR 1 2 Buttons Press to select the input audio source 1 unbalanced or 2 balanced 2 Volume 14 Buttons Press to increase or decrease the output volume 3 MUTE Button Press to turn off or turn on the audio output The button illuminates when the audio output is disabled 4 INPUT 1 Left and Right RCA Connectors Connect to the unbalanced stereo audio source 5 INPUT 2 Terminal Block Connector Connect to the balanced stereo audio source 6 SPKR OUT L L R R Terminal Block Connector Connect to a balanced stereo acceptor speakers 7 RS 232 9 pin D sub Connector Connects to a PC or serial controller 8 PROGRAM Switch Switch up before performing a firmware upgrade leave down for normal operation Installing the 905 in a Rack 5 Installing the 905 in a Rack This section provides instructions for rack mounting the 1U unit Before Installing in a Rack How to Rack Mount Before installing in a rack be sure that the To rack mount a machine environment is within the recommended range 1 Attach both ear brackets to the Operating temperature range 5 to 45 C 41 to 113 F machine To do so remove the Operating humidity range Oto 90 RHL non condensing screws from each side of the Storage temperature range 20 to 70 4 to 15
9. HNOLOGY Introduction 1 Introduction Welcome to Kramer Electronics Since 1981 Kramer Electronics has been providing a world of unique creative and affordable solutions to the vast range of problems that confront the video audio presentation and broadcasting professional on a daily basis In recent years we have redesigned and upgraded most of our line making the best even better Our 1 000 plus different models now appear in 11 groups that are clearly defined by function Thank you for purchasing the Kramer 905 Power Amplifier which is ideal for Presentation rooms and multimedia applications for quick local audio amplification e Personal audio listening for example a PC and portable CD player The package includes the following items e 905 Power Amplifier Power cord Windows based Kramer control software e This user manual 2 Getting Started We recommend that you e Unpack the equipment carefully and save the original box and packaging materials for possible future shipment Review the contents of this user manual Use Kramer high performance high resolution cables 1 GROUP 1 Distribution Amplifiers GROUP 2 Switchers and Matrix Switchers GROUP 3 Control Systems GROUP 4 Format Standards Converters GROUP 5 Range Extenders and Repeaters GROUP 6 Specialty AV Products GROUP 7 Scan Converters and Scalers GROUP 8 Cables and Connectors GROUP 9 Room Connectivity GROUP 10 Acce
10. Kramer Electronics Ltd USER MANUAL Model 905 Power Amplifier Contents Contents 1 Introduction 2 Getting Started 2 1 Quick Start 3 Overview 4 Your 905 Power Amplifier 5 Installing the 905 in a Rack 6 Connecting the 905 Power Amplifier 6 1 Connecting the 905 via RS 232 7 Operating the 905 Power Amplifier 7 1 Using the Front Panel Buttons 7 1 1 Adjusting the Volume 712 Muting the Output 7 1 3 Mixing the Input Signals 7 2 Using the Audio Control Program 7 3 Using Serial Commands 8 Technical Specifications 9 905 Commands in Protocol 3000 9 1 Operating Commands 9 2 Help Commands 9 3 Device Initiated Messages 9 4 Result and Error Codes 9 5 Basic Routing Commands 9 6 Audio Parameters Commands 9 7 Protocol 3000 Syntax 9 7 1 Host Message Format 9 7 1 1 Simple Command 9 7 1 2 Command String 9 7 1 3 Device Message Format 9 7 1 4 Device Long Response 9 7 2 Command Terms 9 7 3 Entering Commands 9 74 Command Forms 9 7 5 Command Chaining 9 7 6 Maximum String Length O 9 1 A WwW E _ Ria A ps e e pl DAnnrnrwfPPpPpPHFPF HPWNNHNNN NY Contents Figures Figure 1 905 Power Amplifier Figure 2 Connecting the 905 Power Amplifier Figure 3 Audio Control Window Tables Table 1 905 Power Amplifier Functions Table 2 905 Technical Specifications Table 3 Communication Parameters 11 11 ii KRAMER SIMPLE CREATIVE TEC
11. arranty WHAT IS COVERED AND WHAT IS NOT COVERED Except as below this warranty covers all defects in material or workmanship in this product The following are not covered by the warranty 1 Any product which is not distributed by Kramer or which is not purchased from an authorized Kramer dealer If you are uncertain as to whether a dealer is authorized please contact Kramer at one of the agents listed in the Web site www kramerelectronics com 2 Any product on which the serial number has been defaced modified or removed or on which the WARRANTY VOID IF TAMPERED sticker has been torn reattached removed or otherwise interfered with 3 Damage deterioration or malfunction resulting from i Accident misuse abuse neglect fire water lightning or other acts ofnature ii Product modification or failure to follow instructions supplied with the product iii Repair or attempted repair by anyone not authorized by Kramer iv Any shipment of the product claims must be presented to the carrier v Removalor installation of the product vi Any other cause which does not relate to a product defect vii Cartons equipment enclosures cables or accessories used in conjunction with the product WHAT WE WILL PAY FOR AND WHAT WE WILLNOT PAY FOR We will pay labor and material expenses for covered items We will not pay for the following 1 Removal or installations charges 2 Costs of initial technical adjustments set up including ad
12. ier 6 1 7 1 7 1 2 Connecting the 905 via RS 232 You can connect to the 905 via an RS 232 connection using for example a PC Note that a null modem adapter connection is not required To connect to the 905 via RS 232 Connect the RS 232 9 pin D sub rear panel port on the 905 unit via a 9 wire straight cable only pin 2 to pin 2 pin 3 to pin 3 and pin 5 to pin 5 need to be connected to the RS 232 9 pin D sub port on your PC Operating the 905 Power Amplifier You can operate your 905 using e The front panel buttons see section 7 1 e The Audio Control program see section 7 2 RS 232 serial commands transmitted by a touch screen system or other serial controller see section 7 3 Using the Front Panel Buttons The front panel buttons let you e Select an input by pressing the INPUT 1 or INPUT 2 buttons Adjust the volume see section 7 1 1 e Mute the sound see section 7 1 2 e Mix the input signals see section 7 1 3 Adjusting the Volume To adjust the volume of the output signal 1 Press the up volume arrow 1 to increase the volume 2 Press the down volume arrow to decrease the volume Muting the Output To temporarily turn off the output e Press the MUTE button The button illuminates and the sound turns off To turn on the output e Press the MUTE button The illumination turns off and the sound turns on at the previous volume level KRAMER SIMPLE CREATIVE TECHNOLOGY
13. isconnect the unit from the power supply before opening servicing Caution 9001 O lt g al toc 2 Institute of Quality amp Control Kramer Electronics Ltd Web site www kramerelectronics com E mail info kramerel com P N 2900 000498 REV 1
14. justment of user controls or programming These costs are the responsibility of the Kramer dealer from whom the product was purchased 3 Shipping charges HOW YOU CAN GET WARRANTY SERVICE 1 To obtain service on you product you must take or ship it prepaid to any authorized Kramer service center 2 Whenever warranty service is required the original dated invoice or a copy must be presented as proof of warranty coverage and should be included in any shipment of the product Please also include in any mailing a contact name company address and a description of the problem s 3 For name of the nearest Kramer authorized service center consult your authorized dealer LIMITATION OFIMPLIED WARRANTIES All implied warranties including warranties of merchantability and fitness for a particular purpose are limited in duration to the length of this warranty EXCLUSIONOFDAMAGES The liability of Kramer for any effective products is limited to the repair or replacement of the product at our option Kramer shall not be liable for 1 Damage to other property caused by defects in this product damages based upon inconvenience loss of use of the product loss of time commercial loss or 2 Any other damages whether incidental consequential or otherwise Some countries may not allow limitations on how long an implied warranty lasts and or do not allow the exclusion or limitation of incidental or consequential damages so the above limita
15. kHz COUPLING DC AUDIO THD NOISE 0 2 1kHz 1V AUDIO 2nd HARMONIC 0 15 1kHz AMPLIFIER TYPE Class D POWER SOURCE 100 240V AC 2 1A DIMENSIONS 19 x7 x1U W D H WEIGHT 2 0kg 4 4165 ACCESSORIES Power cord Table 3 Communication Parameters RS 232 Protocol 3000 Default Baud Rate 9600 Data Bits 8 Stop Bits 1 Parity None Command Format ASCII 1 Specifications are subject to change without notice 11 905 Commands in Protocol 3000 9 905 Commands in Protocol 3000 This section describes all commands sent to the 905 For an explanation of the syntax and use of Protocol 3000 see section 9 7 9 1 Operating Commands Following are the specific commands that the room controller RC device sends to the 905 to operate the external devices 9 2 Help Commands Command Syntax Response Protocol handshaking HCR OK CRLF 9 3 Device Initiated Messages Command Syntax Start message Kramer Electronics LTD Device Model Version Software Version Switcher actions Audio channel has switched breakaway mode AUD IN gt OUT 9 4 Result and Error Codes Syntax Command ran successfully no error PARAMETERS Protocol Errors Syn
16. l 1 for pre amplifier 2 for amplifier OUT etc CHANNEL Input or Output OLUME BASS TREBLE MID RANGE Audio parameter in Kramer units minus sign precedes negative values increase current value decrease current value MIX 0 or OFF T or ON 13 905 Commands in Protocol 3000 9 7 9 7 1 Start Protocol 3000 Syntax Protocol 3000 is used to control the 905 via an RS 232 connection using a PC touch screen other serial controller or RC type controller Host Message Format Address optional Body Delimiter Destination_id Message CR 9 7 1 1 Simple Command Start Command string with only one command without addressing Body Delimiter Command Parameter_1 Parameter_2 9 7 1 2 Command String Start Formal syntax with commands concatenation and addressing Address Body Delimiter Destination_id Command 1 Parameter1_1 Parameter1_2 CR Command 2 Parameter2 1 Parameter2 2 Command 3 Parameter3_1 Parameter3_2 9 7 1 3 Device Message Format Start Address optional Body delimiter Sender id Q Message 9 7 1 4 Device Long Response Start Echoing command Address optional Body Delimiter Sender id a Command SP Param1 Param 2 result CR LF Carriage return ASCII 13 0x
17. ssories and Rack Adapters GROUP 11 Sierra Products 2 We recommend that you use only the power cord supplied with this device 3 Download up to date Kramer user manuals from our Web site at http www kramerelectronics com 4 The complete list of Kramer cables is on our Web site at http www kramerelectronics com 1 Contents 2 1 Quick Start This quick start chart summarizes the basic setup and operation steps Step 1 Mount the machine see Section 5 Mount the machine in a rack or stick the 4 rubber feet to the underside 1 Connect the inputs 2 Connect the output Pair of Speakers Step 3 Connect the control port see Section 6 1 If required connect the RS 232 control port to PC or controller Step 4 Turn the power ON Step 5 Operate the machine see Section 7 INPUTS VOLUME Choose the input adjust the volume via the front panel or via the PC and RS 232 connection 2 KRAMER SIMPLE CREATIVE TECHNOLOGY Overview 3 Overview The Kramer 905 is a high performance power amplifier for line level stereo audio signals It accepts either a stereo audio signal on an RCA connector or a balanced stereo audio signal on a terminal block connector It delivers a speaker output of 80 watts RMS per channel into a 4 load on 10A 4 pin terminal block connector The 905 features e Two input selector buttons e Two buttons
18. tax error ERROO1 Command not available for this device ERROO2 Parameter is out of range Unauthorized access command run without the ERRO004 matching login 9 5 Basic Routing Commands Command Syntax Response Switch audio only AUD IN gt OUTI AUD IN gt OUTI IN gt OUTI RESULT Short form A IN gt OUT INP OUT Switch audio only AUD IN gt OUT IINPOUT AUD IN gt OUTI RESULT Short form A IN gt OUT IN gt OUT Read audio connection AUD OUT AUD IN gt OUT Short form A OUT AUD AUD 1 IN gt 2 Parameter Description N Input number 0 to disconnect output 12 KRAMER SIMPLE CREATIVE TECHNOLOGY 905 Commands in Protocol 3000 gt Connection character between in and out parameters OUT Output number or for outputs 9 6 Audio Parameters Commands Command Syntax Response Set simple audio VOLUME VOLUME VOLUME VOLUME RESULT volume Short form VOL VOLUME Increase decrease VOLUME VOLUME RESULT simple audio volume Short form
19. tions and exclusions may not apply to you This warranty gives you specific legal rights and you may also have other rights which vary from place to place NOTE All products returned to Kramer for service must have prior approval This may be obtained from your dealer This equipment has been tested to determine compliance with the requirements of EN 50081 Electromagnetic compatibility EMC generic emission standard Part 1 Residential commercial and light industry EN 50082 Electromagnetic compatibility EMC generic immunity standard Part 1 Residential commercial and light industry environment CFR 47 FCC Rules and Regulations Part 15 Radio frequency devices Subpart B Unintentional radiators CAUTION DO Servicing the machines can only be done by an authorized Kramer technician Any user who makes changes or modifications to the unit without the expressed approval of the manufacturer will void user authority to operate the equipment BO Use the supplied DC power supply to feed power to the machine DO Please use recommended interconnection cables to connect the machine to other components FCC and CE approved using STP cable for twisted pair products For the latest information on our products and list of Kramer distributors visit our Web site www kramerelectronics com where updates to this user manual may be found We welcome your questions comments and feedback Safety Warning D
20. with ASCII communications software such as HyperTerminal Hercules etc Connect the terminal to the serial Ethernet or USB port on the Kramer device To enter press the Enter key is also sent but is ignored by command parser For commands sent from some non Kramer controllers like Crestron some characters require special coding such as X Refer to the controller manual Command Forms Some commands have short name syntax in addition to long name syntax to allow faster typing The response is always in long syntax Command Chaining Multiple commands can be chained in the same string Each command is delimited by a pipe character When chaining commands enter the message starting character and the message closing character only once at the beginning of the string and at the end 15 905 Commands in Protocol 3000 Commands in the string do not execute until the closing character 15 entered A separate response is sent for every command in the chain 9 7 6 Maximum String Length 64 characters 16 KRAMER SIMPLE CREATIVE TECHNOLOGY LIMITED WARRANTY Kramer Electronics hereafter Kramer warrants this product free from defects in material and workmanship under the following terms HOW LONGIS THE WARRANTY Labor and parts are warranted for seven years from the date of the first customer purchase WHOIS PROTECTED Only the first purchase customer may enforce this w
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