Owner's Manual
Page 1
POWER AMPLIFIER 94 94 Owner's Manual POWER ON OFF POWER SIGNAL CLIP PROTECTION CLIP SIGNAL CH A CH B 350 POWER AMPLIFIER XS SERIES E
POWER AMPLIFIER 94 94 Owner's Manual POWER ON OFF POWER SIGNAL CLIP PROTECTION CLIP SIGNAL CH A CH B 350 POWER AMPLIFIER XS SERIES E
Owner's Manual
Page 2
... range of circuit design. The wire which is coloured BROWN must be connected to the terminal in building PA equipment and its tradition of careful attention to every detail of applications. • Three operating modes are provided: STEREO mode in which CHANNEL A and B operate independently, PARALLEL mode in which a mono source is output by YAMAHA KEMBLE MUSIC (U.K.) LTD. 2 Introduction Thank you to change cut-off frequencies...
... range of circuit design. The wire which is coloured BROWN must be connected to the terminal in building PA equipment and its tradition of careful attention to every detail of applications. • Three operating modes are provided: STEREO mode in which CHANNEL A and B operate independently, PARALLEL mode in which a mono source is output by YAMAHA KEMBLE MUSIC (U.K.) LTD. 2 Introduction Thank you to change cut-off frequencies...
Owner's Manual
Page 3
... for a replacement. Contents Controls and Functions 4 Front Panel 4 Rear Panel 5 Speaker Impedance 7 Caution for normal ventilation. If you think internal inspection, maintenance, or repair is a potential fire and electrical shock hazard. • Do not touch the power plug with a damaged power cord is a fire and electrical shock hazard. • Do not allow the unit to become wet. Precautions • Connect this unit's power cord only to...
... for a replacement. Contents Controls and Functions 4 Front Panel 4 Rear Panel 5 Speaker Impedance 7 Caution for normal ventilation. If you think internal inspection, maintenance, or repair is a potential fire and electrical shock hazard. • Do not touch the power plug with a damaged power cord is a fire and electrical shock hazard. • Do not allow the unit to become wet. Precautions • Connect this unit's power cord only to...
Owner's Manual
Page 4
... problem is the main POWER switch. Controls and Functions s Front Panel POWER 1 ON OFF 234 POWER SIGNAL CLIP PROTECTION CLIP SIGNAL CH A CH B 1 POWER switch and indicator This is corrected, normal amplifier operation resumes. • If overheating occurs: Turn off the power to the amplifier to cool down . 4 The POWER indicator lights up when the amplifier is powered ON. 2 SIGNAL indicators These green LED indicators light up when the respective channel's output signal exceeds 2 Vrms. This is working. Output signal...
... problem is the main POWER switch. Controls and Functions s Front Panel POWER 1 ON OFF 234 POWER SIGNAL CLIP PROTECTION CLIP SIGNAL CH A CH B 1 POWER switch and indicator This is corrected, normal amplifier operation resumes. • If overheating occurs: Turn off the power to the amplifier to cool down . 4 The POWER indicator lights up when the amplifier is powered ON. 2 SIGNAL indicators These green LED indicators light up when the respective channel's output signal exceeds 2 Vrms. This is working. Output signal...
Owner's Manual
Page 5
... Turns the high pass (low cut) filter on . (The cut -off . BRIDGE STEREO PARALLEL • STEREO mode In this mode, the CHANNEL A input signal will be output from the output jacks of 25 Hz to select a filter type and control the cut-off frequencies for a subwoofer. NEL A, B) These knobs and sliding switches are fixed.) This setting is suitable when using the unit as a conventional stereo amp). SUB WOOFER ...... The CHANNEL A and B volumes can use the rear panel CHANNEL A volume control to adjust the output level...
... Turns the high pass (low cut) filter on . (The cut -off . BRIDGE STEREO PARALLEL • STEREO mode In this mode, the CHANNEL A input signal will be output from the output jacks of 25 Hz to select a filter type and control the cut-off frequencies for a subwoofer. NEL A, B) These knobs and sliding switches are fixed.) This setting is suitable when using the unit as a conventional stereo amp). SUB WOOFER ...... The CHANNEL A and B volumes can use the rear panel CHANNEL A volume control to adjust the output level...
Owner's Manual
Page 6
... 7. 5 INPUT terminals (CHANNEL A, B) Two types of balanced terminals for channels A and B are provided. The output impedance varies depending on page 7 for the connected speaker system is used . The minimum impedance for more information.) The following figures show terminal polarity in BRIDGE and PARALLEL mode. • XLR-3-31 type connector They are not used in STEREO, PARALLEL, and BRIDGE modes. • STEREO, PARALLEL mode B-2 CHANNEL A-2 4-8Ω/CHANNEL (STEREO) SPEAKERS B-1 CHANNEL A-1 4-8Ω/CHANNEL (STEREO) (-) (+) 8-16...
... 7. 5 INPUT terminals (CHANNEL A, B) Two types of balanced terminals for channels A and B are provided. The output impedance varies depending on page 7 for the connected speaker system is used . The minimum impedance for more information.) The following figures show terminal polarity in BRIDGE and PARALLEL mode. • XLR-3-31 type connector They are not used in STEREO, PARALLEL, and BRIDGE modes. • STEREO, PARALLEL mode B-2 CHANNEL A-2 4-8Ω/CHANNEL (STEREO) SPEAKERS B-1 CHANNEL A-1 4-8Ω/CHANNEL (STEREO) (-) (+) 8-16...
Owner's Manual
Page 7
Using the barrier strip and binding posts simultanuously STEREO mode connections: MODE BRIDGE STEREO PARALLEL Set to BRIDGE - + + - SPEAKERS - + + - -+ +- Each speaker min. 8Ω Each speaker min. 8Ω BRIDGE mode connections: MODE BRIDGE STEREO PARALLEL Set to STEREO - + + - s Speaker Impedance In STEREO and PARALLEL modes, the minimum load (i.e., speaker) impedance is 8Ω. PARALLEL mode connections: MODE BRIDGE STEREO PARALLEL Set to PARALLEL -+ +- Make sure that the impedance does not fall below this specified impedance. In BRIDGE mode...
Using the barrier strip and binding posts simultanuously STEREO mode connections: MODE BRIDGE STEREO PARALLEL Set to BRIDGE - + + - SPEAKERS - + + - -+ +- Each speaker min. 8Ω Each speaker min. 8Ω BRIDGE mode connections: MODE BRIDGE STEREO PARALLEL Set to STEREO - + + - s Speaker Impedance In STEREO and PARALLEL modes, the minimum load (i.e., speaker) impedance is 8Ω. PARALLEL mode connections: MODE BRIDGE STEREO PARALLEL Set to PARALLEL -+ +- Make sure that the impedance does not fall below this specified impedance. In BRIDGE mode...
Owner's Manual
Page 8
...8486; Each speaker min. 4Ω BRIDGE mode connections: MODE BRIDGE STEREO PARALLEL Set to PARALLEL • Using the barrier strip - + + - SPEAKERS - + + - Not used -+ +- • Using the terminal posts - + + - Not used SPEAKERS - + + - -+ +- SPEAKERS - + + - Using the barrier strip or terminal posts STEREO mode connections: MODE BRIDGE STEREO PARALLEL Set to STEREO PARALLEL mode connections: MODE BRIDGE STEREO PARALLEL Set to BRIDGE • Using the barrier strip - + + - Not used SPEAKERS - + + - - + Speaker min...
...8486; Each speaker min. 4Ω BRIDGE mode connections: MODE BRIDGE STEREO PARALLEL Set to PARALLEL • Using the barrier strip - + + - SPEAKERS - + + - Not used -+ +- • Using the terminal posts - + + - Not used SPEAKERS - + + - -+ +- SPEAKERS - + + - Using the barrier strip or terminal posts STEREO mode connections: MODE BRIDGE STEREO PARALLEL Set to STEREO PARALLEL mode connections: MODE BRIDGE STEREO PARALLEL Set to BRIDGE • Using the barrier strip - + + - Not used SPEAKERS - + + - - + Speaker min...
Owner's Manual
Page 9
....) Speaker's continuous input capacity : 100 W Speaker's impedance : 8Ω I = √100/8 In this time make sure that they touch the chassis. Caution for speaker porality. * Shown actual size. Turn off the POWER switch. 2. Refer to prevent deterioration of the power amplifier, you can protect your amplifier is calculated as 3.5 [A]. • Speaker cable If you use a long speaker cable, use a speaker system that has sufficient input capacity. Be sure to the speaker's input capacity. Power amplifier _+ Fuse Speaker system...
....) Speaker's continuous input capacity : 100 W Speaker's impedance : 8Ω I = √100/8 In this time make sure that they touch the chassis. Caution for speaker porality. * Shown actual size. Turn off the POWER switch. 2. Refer to prevent deterioration of the power amplifier, you can protect your amplifier is calculated as 3.5 [A]. • Speaker cable If you use a long speaker cable, use a speaker system that has sufficient input capacity. Be sure to the speaker's input capacity. Power amplifier _+ Fuse Speaker system...
Owner's Manual
Page 10
... performance of the amps to the following instructions. Rack: Leave a gap of 10 cm or more maximum static pressure. Fan: Use a fan with 0.9 m3/min maximum wind and 5 mmH2O maximum static pressure). Mounting: Install the fan kit on the top slot of the rack. Fan kit XS350/XS250 Blanking panel XS350/XS250 Blanking panel XS350/XS250 71.5±0.1 78...
... performance of the amps to the following instructions. Rack: Leave a gap of 10 cm or more maximum static pressure. Fan: Use a fan with 0.9 m3/min maximum wind and 5 mmH2O maximum static pressure). Mounting: Install the fan kit on the top slot of the rack. Fan kit XS350/XS250 Blanking panel XS350/XS250 Blanking panel XS350/XS250 71.5±0.1 78...
Owner's Manual
Page 11
... you use the power amplifier. Air intake (Side View) Front Air exhaust (Rear View) Completely open FILTER CHANNEL B CHANNEL A LOW CUT 40Hz OFF 80Hz HIGH CUT 5kHz OFF 10kHz LOW CUT 40Hz OFF 80Hz HIGH CUT 5kHz OFF 10kHz 20 15 25 30 10 6 3 40 00 -dB 0 CHANNEL B 20 15 25 30 10 6 3 40 00 -dB 0 CHANNEL A OUTPUT VOLTAGE 70V 100V INPUT CHANNEL B CHANNEL A INPUT CHANNEL B CHANNEL...
... you use the power amplifier. Air intake (Side View) Front Air exhaust (Rear View) Completely open FILTER CHANNEL B CHANNEL A LOW CUT 40Hz OFF 80Hz HIGH CUT 5kHz OFF 10kHz LOW CUT 40Hz OFF 80Hz HIGH CUT 5kHz OFF 10kHz 20 15 25 30 10 6 3 40 00 -dB 0 CHANNEL B 20 15 25 30 10 6 3 40 00 -dB 0 CHANNEL A OUTPUT VOLTAGE 70V 100V INPUT CHANNEL B CHANNEL A INPUT CHANNEL B CHANNEL...
Owner's Manual
Page 12
max.) Input Impedance Controls Front Panel Rear Panel Connectors Indicators Protection Circuits PC limiter Fan Speed Power Requirements Power Consumption Dimensions (W x H x D) Weight Input Output POWER PROTECTION CLIP SIGNAL US & Canada Europe Other Idling 1/8 output power, 4Ω Maximum output, 4Ω XS250 XS350 170 W + 170 W 250 W +...Balanced, 15 kΩ/Unbalanced POWER switch (ON/OFF) Volume (31 position)x 2 Mode switch (STEREO/BRIDGE/PARALLEL) Filter switch (OFF/SUBWOOFER/LOW CUT)x 2 (-12 dB/oct.) Freq. max., input 600Ω shunt Residual Noise Vol. max.) Rated Power...
max.) Input Impedance Controls Front Panel Rear Panel Connectors Indicators Protection Circuits PC limiter Fan Speed Power Requirements Power Consumption Dimensions (W x H x D) Weight Input Output POWER PROTECTION CLIP SIGNAL US & Canada Europe Other Idling 1/8 output power, 4Ω Maximum output, 4Ω XS250 XS350 170 W + 170 W 250 W +...Balanced, 15 kΩ/Unbalanced POWER switch (ON/OFF) Volume (31 position)x 2 Mode switch (STEREO/BRIDGE/PARALLEL) Filter switch (OFF/SUBWOOFER/LOW CUT)x 2 (-12 dB/oct.) Freq. max., input 600Ω shunt Residual Noise Vol. max.) Rated Power...
Owner's Manual
Page 13
A-1 ++ CHANNEL -+ B-1 - s Block Diagram INPUT CHANNEL A (BRIDGE) (PARALLEL) CHANNEL A + (BRIDGE) - (PARALLEL) G INPUT + CHANNEL B - A-2 ++ CHANNEL -+ B-2 - G INPUT CHANNEL B HPF FREQ BA LPF CHANNEL A LOW CUT SUB WOOFER OFF INV HPF FREQ LPF BA PARALLEL BRIDGE STEREO MODE LOW CUT SUB WOOFER OFF CHANNEL B CLIP SIGNAL PROTECTION Protector CLIP SIGNAL - SPEAKERS - s Dimensions D:319 W:480 H:132 Unit: mm 13
A-1 ++ CHANNEL -+ B-1 - s Block Diagram INPUT CHANNEL A (BRIDGE) (PARALLEL) CHANNEL A + (BRIDGE) - (PARALLEL) G INPUT + CHANNEL B - A-2 ++ CHANNEL -+ B-2 - G INPUT CHANNEL B HPF FREQ BA LPF CHANNEL A LOW CUT SUB WOOFER OFF INV HPF FREQ LPF BA PARALLEL BRIDGE STEREO MODE LOW CUT SUB WOOFER OFF CHANNEL B CLIP SIGNAL PROTECTION Protector CLIP SIGNAL - SPEAKERS - s Dimensions D:319 W:480 H:132 Unit: mm 13
Owner's Manual
Page 14
... your dealer or nearest Yamaha service center. A DC voltage of ±2 V or greater was generated in each case. Remedy Locate and correst the cause of at a speaker terminal, amplifier terminal, or wire. Check the amplifier ventilation conditions and take appropriate measures to protect the speaker system. 14 The relay operates to improve airflow around the amplifier. Troubleshooting The following table lists the...
... your dealer or nearest Yamaha service center. A DC voltage of ±2 V or greater was generated in each case. Remedy Locate and correst the cause of at a speaker terminal, amplifier terminal, or wire. Check the amplifier ventilation conditions and take appropriate measures to protect the speaker system. 14 The relay operates to improve airflow around the amplifier. Troubleshooting The following table lists the...
