User manual YAMAHA XS350-XS250

[. . . ] · Variable-speed low-noise fan(s) ensures high reliability even under demanding conditions. This owner's manual covers the two models XS350, XS250. In order to take full advantage of your power amp and enjoy long and trouble-free operation, please read this owner's manual carefully before use. WARNING: THIS APPARATUS MUST BE EARTHED IMPORTANT THE WIRES IN THIS MAINS LEAD ARE COLOURED IN ACCORDANCE WITH THE FOLLOWING CODE: GREEN-AND-YELLOW : BLUE : BROWN : EARTH NEUTRAL LIVE As the colours of the wires in the mains lead of this apparatus may not correspond with the coloured markings identifying the terminals in your plug, proceed as follows: The wire which is coloured GREEN and YELLOW must be connected to the terminal in the plug which is marked by the letter E or by the safety earth symbol or coloured GREEN and YELLOW. The wire which is coloured BLUE must be connected to the terminal which is marked with the letter N or coloured BLACK. [. . . ] If noise occurs, use the telephone away from the unit. Clean the contacts of the phone plug before connecting it to the SPEAKERS jack of this unit. Dirty contacts may generate heat. · · · · · · · · · · · · · · · · · Contents Controls and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Speaker Impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Caution for Speaker Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Rack Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Mounting in an EIA standard rack . . . . . . . . . . . . . . . . . . . . . 10 Portable Rack Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Fixed Installation Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 General Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 3 Controls and Functions s Front Panel POWER 1 ON OFF 2 3 4 POWER SIGNAL CLIP PROTECTION CLIP SIGNAL CH A CH B 1 POWER switch and indicator This is the main POWER switch. The POWER indicator lights up when the amplifier is powered ON. 4 PROTECTION indicator These LED indicators light up to indicate that the protection circuit is working. The speaker system is disconnected from the amplifier outputs and no sound is output from the speakers. The protection circuit is activated in the following situations: · When the amplifier is powered on: The protection circuit is activated for approximately 3 seconds when the amplifier is powered on. After 3 seconds, the protection system is deactivated automatically, and the amplifier is ready to use. · If a DC voltage is present at the amplifier's outputs: If the DC voltage problem is corrected, normal amplifier operation resumes. [. . . ] max. ) Input Impedance Controls Front Panel Rear Panel 8, f= 1 kHz STEREO BRIDGE 8/STEREO 4/STEREO 8/BRIDGE 8/STEREO 4/STEREO 8/BRIDGE 2/STEREO Half Power 4~8/STEREO 8/BRIDGE 8, Po= 1 W 4~8/STEREO 8/BRIDGE 170 W + 170 W 250 W + 250 W 500 W 185 W + 185 W 280 W + 280 W 560 W 400 W + 400 W 10 Hz~40 kHz (THD+N= 0. 1%) 0. 05% +0. 5, ­1 dB 0. 05% 65 dB, 20 Hz~20 kHz ­70 dB ­75 dB 100 dB 100 ±30 V/µs ±40 V/µs +1. 7 dB 32. 1 dB +3. 1 dB 32. 1 dB 10 Hz~50 kHz XS350 230 W + 230 W 350 W + 350 W 700 W 250 W + 250 W 400 W + 400 W 800 W 600 W + 600 W Half Power, RL= 8, Vol. max. , input 600 shunt 12. 7 kHz LPF IHF-A network Vol. max. ) Rated Power into 8 30 k/Balanced, 15 k/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. control (25 Hz~125 Hz)x 2 Barrier strip terminal XLR-3-31 type/ch Barrier strip terminal 5-way binding posts Green x 2 (Red) x 2 (Red) x 2 (Green) POWER switch ON muting, DC detection, Temp. [. . . ]