USER MANUAL - BroadcastStore.com
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1. 82 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 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 B Use the supplied DC power supply to feed power to the machine B Please use recommended interconnection cables to connect the machine to other components KRAMER For the latest information on our products and a list of Kramer distributors visit our Web site www kramerelectronics com Updates to this user manual may be found at http www kramerelectronics com manuals html We welcome your questions comments and feedback 007 o A lt 1QC e Institute of Quality 8 Control Kramer Electronics Ltd Web site www kramerelectronics com E mail info Okramerel com P N 2900 006014 REV 22. Kramer Electronics Ltd ah KRAMER USER MANUAL Model 903 Personal Stereo Amplifier Contents Contents 1 Introduction 2 Getting Started 3 Your Personal Stereo Amplifier 4 Using the Personal Stereo Amplifier 4 1 Connecting the Personal Stereo Amplifier 4 2 Operating the Personal Stereo Amplifier 5 Technical Specifications Figures Figure 1 903 Personal Stereo Amplifier Figure 2 Connecting the 903 Personal Stereo Amplifier Tables Table 1 Features and Functions of the 903 Personal Stereo Amplifier Table 2 Technical Specifications of the 903 Personal Stereo Amplifier DAA op W KRAMER Introduction 1 Introduction Dedication by Kramer Electronics since 1981 to the development and manufacture of high quality video audio equipment makes the Kramer line an integral part of the finest production and presentation facilities in the world In recent years Kramer has redesigned and upgraded most of the line making the best even better The Kramer line of professional video audio electronics is one of the most versatile and complete available and is a true leader in terms of quality workmanship price performance ratio and innovation In addition to our high quality accessories like the Kramer TOOLS 903 Personal Stereo Amplifier we also offer excellent switchers and matrices distribution amplifiers presentation processors interfaces remote controllers and computer related products Congrat
3. e of the agents listed in the web site www kramerelectronics com Ze Any product on which the serial number has been defaced modified or removed 35 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 Removal or 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 WILL NOT 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 Ze 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 inc
4. ications of the 903 Personal Stereo Amplifier Inputs 3 stereo inputs on RCA connectors 1 stereo input on mini 3 5 mm socket Outputs Stereo loudspeakers 4Q speakers or higher on terminal block Headphones Bandwidth 20 kHz 3dB S N Ratio 77 dB unweighted THD Noise 0 5 1kHz 60mV Controls 4 input selector switches volume bass mid treble and balance control knobs Output Power Up to 20 Watts RMS Dimensions 12 cm x 7 5 cm x 2 5 cm 4 7 x 2 95 x 0 98 W D H Power Source 12 VDC 2 5A Weight 0 3 kg 0 66lbs approx Accessories Power supply mounting bracket 1 Specifications are subject to change without notice 6 KRAMER ELECTRONICS LTD LIMITED WARRANTY Kramer Electronics hereafter Kramer warrants this product free from defects in material and workmanship under the following terms HOW LONG IS THE WARRANTY Labor and parts are warranted for three years from the date of the first customer purchase WHO IS 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 on
5. lude 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 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 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 500
6. ni 3 5 mm socket for easy interface with a sound card or any music player e ALOUD switch for automatic equalization in low volume listening Achieving the best performance means e Connecting only good quality connection cables thus avoiding interference deterioration in signal quality due to poor matching and elevated noise levels often associated with low quality cables e Avoiding interference from neighboring electrical appliances and positioning your Kramer 903 away from moisture excessive sunlight and dust 1 Plugging in the headphone set automatically disconnects the loudspeakers 2 Portable CD player minidisk player Walkman 3 Pressing the LOUD switch compensates for what the ear does not hear in noisy environments or with a low volume Pressing the LOUD switch with a high volume has little effect 2 KRAMER ELECTRONICS LTD Your Personal Stereo Amplifier Figure 1 and Table 1 define the 903 Personal Stereo Amplifier 1 90000009 L L R R SPEAKERS OUT T DC Personal Stereo Amplifier PHONES ON LOUD BAL Left VOLUME Right INPUT 4 Left Right INPUT 3 Left Right INPUT 2 INPUT 1 BASS MID TREBLE INPUT SELECTOR 4 3 2 1 00 0 0 20000 Y Figure 1 903 Personal Stereo Amplifier Table 1 Features and Functions of the 903 Personal Stereo Amplifier Feature Function 1 12V DC 12V DC connector for powering the
7. reo Amplifier respectively 4 1 Connecting the Personal Stereo Amplifier Connect your 903 as the example in Figure 2 illustrates 1 Connect a stereo audio source to the Left and Right RCA connectors for up to 3 inputs that is INPUT 2 INPUT 3 and INPUT 4 2 Connect a music player to the 3 5 mm socket INPUT 1 3 Connect one or both of the following outputs e The SPEAKERS OUT connector to a pair of loudspeakers by connecting the left loudspeaker to the L and the L terminal block connectors and the right loudspeaker to the R and the R terminal block connectors Do not Ground the loudspeakers e The PHONES connector to a headphone set plugging in a headphone set to the PHONES connector disconnects the loudspeakers 4 Connect the 12V DC power adapter to the power socket and connect the adapter to the mains electricity 4 2 Operating the Personal Stereo Amplifier Operate your 903 as Figure 2 illustrates 1 Choose the active audio source via an INPUT SELECTOR switch 2 Adjust the volume bass mid treble and balance controls as required 3 Select the LOUD switch setting as required 1 Unused inputs may be left unconnected 4 KRAMER ELECTRONICS LTD Using the Personal Stereo Amplifier Headphone Pair of Loudspeakers Figure 2 Connecting the 903 Personal Stereo Amplifier KRAMER Technical Specifications 5 Technical Specifications Table 2 Technical Specif
8. ulations on purchasing your Kramer 903 Personal Stereo Amplifier This product is ideal for e Presentation rooms and multimedia applications for quick local audio amplification e Personal audio listening for example PC and portable CD player The package includes the following items e 903 Personal Stereo Amplifier e Power adapter 12V 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 3 Your Personal Stereo Amplifier The high performance 903 Personal Stereo Amplifier can output up to 20 Watts RMS as it uses the latest Class D technology for highly efficient conversion to the pair of loudspeakers with the absolute minimum power loss 1 Download up to date Kramer user manuals from the Internet at this URL http www kramerelectronics com manuals html 2 More than is needed for personal and small presentation applications 3 This prevents the 903 from over heating The 903 can generate its maximum power output from a 12V power supply KRAMER Your Personal Stereo Amplifier The 903 includes e Control knobs to adjust volume bass mid treble and stereo balance e 4INPUT SELECTOR switches e Outputs for a headphone set and for a pair of loudspeakers e 3 stereo inputs on standard RCA connectors e An additional input on a mi
9. unit 2 SPEAKERS OUT L L R R Connect to the pair of loudspeakers Terminal Block Connectors 3 INPUT 4 Left RCA Connector Connects to the left stereo audio line level source 4 4 INPUT 4 Right RCA Connector Connects to the right stereo audio line level source 4 5 INPUT 3 Left RCA Connector Connects to the left stereo audio line level source 3 6 INPUT 3 Right RCA Connector Connects to the right stereo audio line level source 3 7 INPUT 2 Left RCA Connector Connects to the left stereo audio line level source 2 8 INPUT 2 Right RCA Connector Connects to the right stereo audio line level source 2 9 INPUT 1 Mini 3 5 mm Socket Connects to an interface with a sound card or other player 10 INPUT SELECTOR Switches Pushing in selects the appropriate input from 1 to 4 11 Treble Control Knob Controls the treble high frequencies 12 MID Control Knob Controls the mid frequencies 13 Bass Control Knob Controls the bass low frequencies 14 Volume Control Knob Controls the signal output level 15 Balance Control Knob Adjusts the balance between the right and left channels 16 LOUD Switch Boosts equalization for low volume listening environments 17 ONLED llluminates when receiving power 18 PHONES connector Connects to the headphone set KRAMER Using the Personal Stereo Amplifier 4 Using the Personal Stereo Amplifier Sections 4 1 and 4 2 describe how to connect and how to operate your 903 Personal Ste
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