Kramer Electronics 907 audio amplifier
Contents
1. 1 907 Power Amplifier Functions Feature Function 1 INPUT Terminal Block Connector Connect to a balanced stereo audio source 2 OUTPUT Terminal Block Connector Connect to a balanced stereo acceptor speakers 3 GAIN DIP switches 4 position switch for setting the basic gain level 4 24V DC Connector 24V DC for powering the unit 5 MUTE Pushbutton Press to disable enable the audio output 6 VOLUME Potentiometer Knob Turn to raise or lower the output volume 7 MUTE LED llluminates yellow when the volume is disabled 8 ONLED llluminates green when receiving power KRAMER SIMPLE CREATIVE TECHNOLOGY Connecting the 907 Power Amplifier 5 Connecting the 907 Power Amplifier To connect the 907 as the example in Figure 4 illustrates do the following 1 Connect the balanced stereo audio source for example a stereo audio player to the INPUT terminal block connector 2 Connect the OUTPUT terminal block connectors to the acceptors a pair of speakers Do not ground the loudspeakers 3 Connect the 24V DC power adapter to the power socket and connect the adapter to the mains electricity 4 If necessary adjust the basic volume level by setting the GAIN DIP switches see Table 2 5 Adjust the output volume by turning the VOLUME potentiometer Table 2 DIP switch Gain Levels 00 01 10 11 Setting Gain 20dB 26dB 32dB 36dB 5 1 Connecting the Stereo Audio Inp2. Kramer Electronics Ltd USER MANUAL Model 907 Power Amplifier Contents Contents 1 Introduction Getting Started 2 1 Quick Start Overview 4 Your 907 Power Amplifier 5 Connecting the 907 Power Amplifier 5 1 Connecting the Stereo Audio Input 6 Technical Specifications Figures Figure 1 907 Power Amplifier Functions Figure 2 Connecting the Balanced Stereo Audio Input Output Figure 3 Connecting the Unbalanced Stereo Audio Input Figure 4 Connecting the 907 Power Amplifier Tables Table 1 907 Power Amplifier Functions Table 2 DIP switch Gain Levels Table 3 907 Technical Specifications Aann Bw sm DO Ur Un st uu 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 MultiTOOLS 907 Power Amplifier which is ideal for e Presentation rooms and multimedia applications for quick local audio amplification e Personal audio listening for example a PC and portable CD player Each package includes the following items e The 907 Power Amplifie
3. l 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 limitations 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 B gt 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 Use the supplied DC power supply to feed power to the machine B gt Please use recommended interconnection cables to connect the machine to other components FCC and CE approved using STP cable for twisted
4. n 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 adjustment 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 the name of the nearest Kramer authorized service center consult your authorized dealer LIMITATION OF IMPLIED WARRANTIES All implied warranties including warranties of merchantability and fitness for a particular purpose are limited in duration to the length of this warranty EXCLUSION OF DAMAGES 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 commercia
5. ower amplifier for line level stereo audio signals It accepts a balanced stereo audio signal on a terminal block connector It delivers 150 watts per channel of music output to the speakers The 907 features e Input and output on terminal block connections e A volume control knob e Gain control DIP switches e A mute button e 24V DC power To achieve the best performance e 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 907 away from moisture excessive sunlight and dust No operator serviceable parts inside unit Use only the Kramer Electronics input power wall adapter that is provided with this unit Disconnect power and unplug unit from wall before installing or removing device or servicing unit 1 Available from Kramer Electronics on our Web site at http www kramerelectronics com 2 For example part number 2535 000245 3 Your 907 Power Amplifier Your 907 Power Amplifier Figure 1 and Table 1 define the unit 48 QO OY l MultiTooLs MUTE VOLUME WE ON O oo wo gt Power Amplifier 807 0 Figure 1 907 Power Amplifier Functions Table
6. pair products For the latest information on our products and a 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 Disconnect the unit from the power supply before opening servicing PN 2900 000523 Rev 3 Kramer Electronics Ltd Web site www kramerelectronics com E mail info kramerel com P N 2900 000523 REV 3
7. r e Power adapter 24V DC input 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 e Review the contents of this user manual e 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 Accessories and Rack Adapters GROUP 11 Sierra Products 2 Download up to date Kramer user manuals from our Web site at http www kramerelectronics com 3 The complete list of Kramer cables is on our Web site at http www kramerelectronics com 1 Getting Started 2 1 Quick Start This quick start chart summarizes the basic setup and operation steps Step 1 Connect the inputs and outputs see section 4 Connect the input Connect the outputs Stereo Audio Player Speakers Step 2 Connect the power Step 3 Operate the machine see section 4 GAIN Adjust or Mute the volume Set the GAIN DIP switches Al with the VOLUME knob and MUTE pushbutton 2 KRAMER SIMPLE CREATIVE TECHNOLOGY Overview 3 Overview The Kramer MultiTOOLS 907 is a high performance Class D p
8. roduct 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 warranty 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 of nature 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 conjunctio
9. ut Figure 2 and Figure 3 illustrate how to wire a balanced unbalanced input connection Figure 2 Connecting the Figure 3 Connecting the Balanced Stereo Audio Unbalanced Stereo Audio Input Output Input 1 Switch OFF the power on each device before connecting it to your 907 After connecting your 907 switch on its power and then switch on the power on each device 5 Technical Specifications Stereo Audio Player Speakers Figure 4 Connecting the 907 Power Amplifier 6 Technical Specifications The 907 technical specifications are shown in Table 3 Table 3 907 Technical Specifications INPUT Balanced stereo audio on a terminal block connector OUTPUT Balanced stereo audio speakers on a terminal block connector OUTPUT POWER 40W per channel into 8Q OUTPUT MUSIC POWER 150W per channel into 8Q INPUT SENSITIVITY 1 2Vrms AMPLIFIER TYPE Class D VOLTAGE GAIN 200B x10 BANDWIDTH 3dB 20kHz S N RATIO 60 2dB COUPLING DC AUDIO THD NOISE 1 9 AUDIO 2nd HARMONIC 0 3 POWER SOURCE 24V DC 5A DIMENSIONS 10 7cm x 10 4cm x 4 0cm 4 2 x 4 1 x 1 6 W D H WEIGHT 0 32kg 0 7Ibs ACCESSORIES Power supply OPTIONS RK 1 19 rack mount adapter Specifications are subject to change without notice 6 KRAMER SIMPLE CREATIVE TECHNOLOGY LIMITED WARRANTY Kramer Electronics hereafter Kramer warrants this p
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