Yamaha XS250 - Manuals - manualsarea.com

Page 2 - Introduction; IMPORTANT

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 PAequipment and its tradition of careful attention to every detail of circuit design. These ampsfeature high power and superb q...

Page 3 - Precautions; Contents

3 Precautions Contents Controls and Functions ............................................. 4 Front Panel ........................................................... 4Rear Panel ........................................................... 5Speaker Impedance ..............................................

Page 4 - Controls and Functions; Front Panel; • When the amplifier is powered on:

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 indicatorThis is the main POWER switch. Press to power ONthe amplifier. Press again to power OFF. The POWERindicator lights up when the amplifier is powered ON. 2 SIGNAL ...

Page 5 - Rear Panel; dB and; • STEREO mode

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 - • STEREO, PARALLEL mode; • BRIDGE mode; • Barrier strip

6 4 SPEAKERS terminalsTwo 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 andoutput identical signals simultaneously. The outputimpedance varies depending on whether you useeither or b...

Page 7 - Speaker Impedance; . In BRIDGE mode it is 8; Using the barrier strip and binding posts simultanuously; STEREO mode connections:; PARALLEL mode connections:; BRIDGE mode connections:

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 - Using the barrier strip or terminal posts

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 - Caution for Speaker Connection; Turn off the POWER switch.; • Speaker fuse; : Speaker’s nominal impedance; • Speaker cable

9 Caution for Speaker Connection 1. Turn off the POWER switch. 2. Remove the cover attachment screws and remove theprotective cover from the speaker terminals. Screw 3. For Barrier strip:After removing approx. 15 mm of insulation from theends of the speaker cables, bind the bare ends of thespeaker w...

Page 10 - Rack Mounting; Mounting in an EIA standard rack; /min or more maximum wind and 5 mmH; Example of mounting; /min maximum wind and 5 mmH

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 theinterior of the amp to become very hot, causing the performance of the amps to be impaired. In particular, whenmounting in a rack who...

Page 12 - Specifications; General 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; Dimensions

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 theprotective circuit operation in each c a se. Protection Circuit Remedy Probable Cause Indicator CLIP indicator lights. PROTECTIONindicator lights. There is a short a...

Page 15 - YAMAHA CORPORATION

YAMAHA CORPORATION V352950 R1 1 IP 16 Pro Audio Division, #18/3 P.O. Box 3, Hamamatsu, 430-8651, Japan NP Printed in Taiwan