Kramer Electronics 903 Stereo Amplifier User Manual
Contents
1. FCC and CE approved using STP cable for twisted pair products amp B gt KRAMER SIMPLE CREATIVE TECHNOLOGY K 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 Caution 9001 o lt Q al toc fe Institute of Quality 8 Control amp ES Q A UG x gt ed Quatty Kramer Electronics Ltd Web site www kramerelectronics com E mail info kramerel com P N 2900 006014 REV 42. 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 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
3. Kramer Electronics Ltd USER MANUAL Model 903 Personal Stereo Amplifier Contents Contents 1 Introduction 2 Getting Started 1 Quick Start Overview Your 903 Personal Stereo Amplifier Connecting the 903 Personal Stereo Amplifier Operating the 903 Personal Stereo Amplifier IAN BR wWHD Technical Specifications Figures Figure 1 903 Personal Stereo Amplifier Figure 2 Connecting the 903 Personal Stereo Amplifier Figure 3 903 Controls Tables Table 1 Features and Functions of the 903 Personal Stereo Amplifier Table 2 Technical Specifications of the 903 Personal Stereo Amplifier NI Aun BW NS ns 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 your Kramer MegaTOOLS 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 Ster
4. 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 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
5. LOGY Overview Overview The high performance 903 Personal Stereo Amplifier outputs up to 20W RMS per channel It uses Class D technology for highly efficient signal conversion to a pair of loudspeakers with minimum power loss The 903 includes Control knobs to adjust volume bass mid treble and stereo balance 4 input selector switches Outputs for a headphone set and for a pair of loudspeakers 3 stereo inputs on standard RCA connectors 1 stereo input on a mini 3 5mm socket A LOUD switch for automatic equalization in low volume listening 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 Avoid interference from neighboring electrical appliances that may adversely influence signal quality and position your Kramer 903 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 the unit MENTA Disconnect power and unplug unit from wall before installing or removing the device or servicing unit 1 This prevents the 903 from over heating The 903 can generate its maximum power output from a 12V power supply 2 Available from Kramer Electronics on our Web site at http www kramerelectronics com Your 903 Personal Stereo Amplif
6. eo Amplifier e Power adapter 12V DC Input 2 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 5 1 Connect the Inputs Headph n Connect the outputs gagpnone N Stereo Audio Stereo Audio Player 3 Player 4 Pair of Loudspeakers Step 2 Connect the power Step 3 Operate the amplifier see section 6 A K Y ___ n 4 Choose the input source INPUT SECTOR Adjust the volume and coda sound characteristics z ae KRAMER SIMPLE CREATIVE TECHNO
7. ier 4 Your 903 Personal Stereo Amplifier Figure 1 and Table 1 define the 903 Personal Stereo Amplifier RIGHT LEFT RIGHT LEFT RIGHT LEFT SPEAKERS OUT o INPUT 1 INPUT 2 INPUT 3 INPUT 4 ON Loup O DO O alo INPUT SELECTOR 3 2 1 m VOLUME Personal Stereo Amplifier Figure 1 903 Personal Stereo Amplifier KRAMER SIMPLE CREATIVE TECHNOLOGY Connecting the 903 Personal Stereo Amplifier Table 1 Features and Functions of the 903 Personal Stereo Amplifier Feature Function 1 INPUT 1 3 5mm Mini Jack Connects to an interface with a sound card or other player 2 INPUT 2 Right RCA Connector Connects to the right stereo audio line level source 2 3 INPUT 2 Left RCA Connector Connects to the left stereo audio line level source 2 4 INPUT 3 Right RCA Connector Connects to the right stereo audio line level source 3 5 INPUT 3 Left RCA Connector Connects to the left stereo audio line level source 3 6 INPUT 4 Right RCA Connector Connects to the right stereo audio line level source 4 7 INPUT 4 Left RCA Connector Connects to the left stereo audio line level source 4 8 SPEAKERS OUT R R L L Connect to the pair of loudspeakers Terminal Block Connectors 9 12VDC 12V DC connector for powering the unit 10 PHONES Connector Connects to the headphone set 11 ON LED llluminates when receiving power 12 LOUD Button Bo
8. osts equalization for low volume listening environments 13 BAL Control Knob Adjusts the balance between the right and left channels 14 VOLUME Control Knob Controls the signal output level 15 BASS Control Knob Controls the bass low frequencies 16 MID Control Knob Controls the mid frequencies 17 TREBLE Control Knob Controls the treble high frequencies 18 INPUT SELECTOR Buttons Pushing in selects the appropriate input from 1 to 4 Connecting the 903 Personal Stereo Amplifier Connect your 903 as the example in Figure 2 illustrates 1 Connect up to 4 stereo audio sources to the Left and Right RCA connectors INPUT 2 INPUT 3 and INPUT 4 Connect a music player to the 3 5 mm socket INPUT 1 Connect 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 Note Do not ground the loudspeakers Connect the PHONES connector to a headphone set plugging in a headphone set to the PHONES connector disconnects the loudspeakers Connect the 12V DC power adapter to the power socket and connect the adapter to the mains electricity 1 Unused inputs may be left unconnected Operating the 903 Personal Stereo Amplifier Headphone Set SS Stereo Audio Stereo Audio Player 3 a Player 4 Pair of Loudspeakers Fig
9. 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 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 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 Please use recommended interconnection cables to connect the machine to other components
10. ure 2 Connecting the 903 Personal Stereo Amplifier Operating the 903 Personal Stereo Amplifier To operate your 903 as Figure 3 illustrates 1 Choose the active audio source by pressing an INPUT SELECTOR button 2 Adjust the VOLUME BASS MID TREBLE and BALANCE controls as required 3 Select the LOUD switch setting as required OL Figure 3 903 Controls KRAMER SIMPLE CREATIVE TECHNOLOGY Technical Specifications 7 Technical Specifications Table 2 Technical Specifications of the 903 Personal Stereo Amplifier INPUTS 1 unbalanced stereo audio 1Vpp 50KQ on a 3 5mm mini jack 3 unbalanced stereo audio 1Vpp 50kKQ on RCA connectors OUTPUTS Stereo headphone on a 6 5mm connector loudspeakers on a terminal block connector automatic switching when a headphone is plugged in OUTPUT POWER 2x10W 40 OUTPUT MUSIC POWER 2x40W 40 BANDWIDTH 3dB 20kHz S N RATIO 77dB 1kHz CROSSTALK 73dB 1kHz all hostile CONTROLS Input selector switches bass 70Hz mid 1kHz treble 15kHz 13dB volume balance and loudness controls COUPLING AC AUDIO THD NOISE 0 5 AUDIO 2nd HARMONIC 0 3 POWER SOURCE 12V DC up to 2 5A DIMENSIONS 19cm x 13 5cm x 2 5cm 7 5 x 5 3 x 0 98 W D H WEIGHT 0 6kg 1 32lbs approx ACCESSORIES Power supply OPTIONS RK T2B 19 rack adapter 1 Specifications are subject to change without notice
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