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Yamaha XS250 Owner's Manual

Other manuals for XS250: Service Manual
Manual is about: Power amplifier

Summary of XS250

  • Page 1

    Power amplifier xs350 xs250 owner’s manual e power power amplifier xs series power signal clip signal clip protection ch a ch b on off 350

  • Page 2: Introduction

    2 introduction thank you for purchasing a yamaha xs350, xs250 series power amplifier. This series of audio amps was developed from yamaha's wealth of experience in building pa equipment and its tradition of careful attention to every detail of circuit design. These amps feature high power and superb...

  • Page 3: Precautions

    3 precautions contents controls and functions ............................................. 4 front panel ........................................................... 4 rear panel ........................................................... 5 speaker impedance ............................................

  • Page 4: Controls and Functions

    4 controls and functions ■ front panel power power signal clip signal clip protection ch a ch b on off 3 4 2 1 1 power switch and indicator this is the main power switch. Press to power on the amplifier. Press again to power off. The power indicator lights up when the amplifier is powered on. 2 sign...

  • Page 5: ■ Rear Panel

    5 ■ rear panel b-2 channel a-2 8-16 Ω (bridge) (–) (+) 4-8 Ω /channel (stereo) b-1 channel a-1 8-16 Ω (bridge) (–) – – + + (+) 4-8 Ω /channel (stereo) (bridge) (parallel) (bridge) (parallel) filter channel b channel a freq. Freq. Input channel b channel a input channel b channel a speakers g g mode ...

  • Page 6

    6 4 speakers terminals two types of speaker output terminals: binding post (channel a-1, b-1) and barrier strip (channel a-2, b-2) are available. These parallel wirings are internally connected and output identical signals simultaneously. The output impedance varies depending on whether you use eith...

  • Page 7: ■ Speaker Impedance

    7 ■ speaker impedance in stereo and parallel modes, the minimum load (i.E., speaker) impedance is 4 Ω . In bridge mode it is 8 Ω . Make sure that the impedance does not fall below this specified impedance. Using the barrier strip and binding posts simultanuously stereo mode connections: mode stereo ...

  • Page 8

    8 using the barrier strip or terminal posts stereo mode connections: mode stereo parallel bridge set to stereo parallel mode connections: mode stereo parallel bridge set to parallel – – + + speakers • using the barrier strip – speakers – – + + • using the terminal posts not used not used – – + + – +...

  • Page 9

    9 caution for speaker connection 1. Turn off the power switch. 2. Remove the cover attachment screws and remove the protective cover from the speaker terminals. Screw 3. For barrier strip: after removing approx. 15 mm of insulation from the ends of the speaker cables, bind the bare ends of the speak...

  • Page 10: Rack Mounting

    10 rack mounting ■ mounting in an eia standard rack if multiple high-power amp units are mounted in a rack with poor ventilation, the heat from the amps will cause the interior of the amp to become very hot, causing the performance of the amps to be impaired. In particular, when mounting in a rack w...

  • Page 11: ■ Portable Rack Mounting

    11 ■ portable rack mounting this unit uses a forced cooling system in which air comes in through the front opening and goes out from the sides and rear. If you mount a single unit on a portable rack, be sure to maintain vent openings on the rear and sides. Filter channel b channel a input channel b ...

  • Page 12: Specifications

    12 specifications ■ general specifications xs250 xs350 power output level (rated power) 8 Ω /stereo 170 w + 170 w 230 w + 230 w 20 hz~20 khz 4 Ω /stereo 250 w + 250 w 350 w + 350 w thd+n= 0.1% 8 Ω /bridge 500 w 700 w 1 khz 8 Ω /stereo 185 w + 185 w 250 w + 250 w thd+n= 0.1% 4 Ω /stereo 280 w + 280 w...

  • Page 13: ■ Block Diagram

    13 ■ block diagram protector clip clip mode off low cut sub woofer off low cut (parallel) (bridge) (parallel) (bridge) input input channel b channel a channel b channel a + – g g – + input b-2 a-2 channel – + + – + – – + – + + – b-1 a-1 channel speakers signal signal protection inv channel a channel...

  • Page 14: Troubleshooting

    14 troubleshooting the following table lists the main causes of abnormal operation and the corrective measures required, as well as the protective circuit operation in each c a se. Protection circuit remedy probable cause indicator clip indicator lights. Protection indicator lights. There is a short...

  • Page 15

    Yamaha corporation v352950 r1 1 ip 16 pro audio division, #18/3 p.O. Box 3, hamamatsu, 430-8651, japan np printed in taiwan.