User manual YAMAHA KAX-2500

[. . . ] POWER AMPLIFIER 使用说明书 Owner’s Manual ZH EN • Explanation of Graphical Symbols CAUT I O N RISK OF ELECTRIC SHOCK DO NOT OPEN The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated “dangerous voltage” within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the product. CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK). REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. The above warning is located on the top of the unit IMPORTANT SAFETY INSTRUCTIONS 1 2 3 4 5 6 7 Read these instructions. Install in accordance with the manufacturer’s instructions. [. . . ] IMPORTANT: When connecting this product to accessories and/or another product use only high quality shielded cables. Cable/s supplied with this product MUST be used. Failure to follow instructions could void your FCC authorization to use this product in the USA. * This applies only to products (KAX-5000) distributed by YAMAHA CORPORATION OF AMERICA. 4 Introduction Thank you for your purchase of the YAMAHA KAX-5000, KAX3500 or KAX-2500 power amplifier. These KAX-series amplifiers fully incorporate Yamaha’s renown technological expertise, and offer high reliability, rock-solid stability, and superb acoustic characteristics—all in a trim, 2U-sized package. Features • With two types of input jacks (balanced XLR and balanced phone) and three types of output jacks (Speakon, 5-way binding post, and phone), the KAX-series is suitable for a wide variety of applications and installed systems. • The unit offers three operating modes: STEREO (where Channels A and B operate independently), PARALLEL (where the unit outputs a mono source through twin amplifier systems), and BRIDGE (where the unit operates as a single high-power amp). • Each channel is equipped with an independent OFF/LOW CUT/SUBWOOFER switch—where LOW CUT engages a high-pass filter, and SUBWOOFER engages a low-pass filter. With LOW CUT or SUBWOOFER selected, you can adjust the cutoff frequency from 25 to 150 Hz. • Each channel has its own SIGNAL and CLIP indicators. • The PROTECTION indicator lights up—and sound output is automatically muted—whenever the unit’s protective circuitry is operating. The TEMP indicator lights up if the unit is running hot. • Variable-speed low-noise fans ensure high reliability. This Owner’s Manual covers the three models: KAX-5000, KAX-3500 and KAX-2500 power amplifiers. Please read through this manual carefully before beginning use, so that you will be able to take full advantage of the amplifier’s superlative features and enjoy trouble-free operation for years to come. After reading through the manual, please store it in a safe place. Contents Controls and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Speaker Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Speaker impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Rack Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . The fan speed will then vary automatically as the temperature changes. 5 SIGNAL indicator Lights up green when the corresponding channel’s output level exceeds 2 Vrms (equivalent to 1/2 W into an 8 Ω load, or 1 W into a 4 Ω load). 6 Volume control knobs Each control knob adjusts the volume of the corresponding channel, in 31 steps from –∞ dB to 0 dB. NOTE: If you wish to lock in the knob settings, you can fasten the supplied security cover over the knobs so that the settings will not be disturbed. 6 ■ Rear Panel 12 SUB LOW CUT WOOFER OFF SUB OFF WOOFER LOW CUT LOCK 5 LOCK SPEAKERS 2 3 3 90 50 125 90 2 ON OFF 50 125 25 Hz 150 STEREO BRIDGE PARALLEL 25 Hz 150 FREQUENCY FREQUENCY + 1+ - 1- 1+ + 1- 2+ + 2- - INPUT - 1 + + 1 - (-) BRIDGE (+) 43 6 1 FILTER switch and FREQUENCY adjustment knob (One pair for each channel) Use these controls to select the filter type and adjust the cutoff frequency on each channel (A and B). [. . . ] speaker system. 15 For details of products, please contact your nearest Yamaha representative or the authorized distributor listed below. 关于各产品的详细信息，请向就近的 YAMAHA 代理商或下列 经销商询问。 NORTH AMERICA CANADA Yamaha Canada Music Ltd. 135 Milner Avenue, Scarborough, Ontario, M1S 3R1, Canada Tel: 416-298-1311 MARTA Olimpus Music Ltd. Louis Street Msida MSD06 Tel: 02133-2144 ASIA THE PEOPLE’S REPUBLIC OF CHINA Yamaha Music & Electronics (China) Co. , Ltd. 2F, Yunhedasha, 1818 Xinzha-lu, Jingan-qu, Shanghai, China Tel: 021-6247-2211 U. S. A. Yamaha Corporation of America 6600 Orangethorpe Ave. , Buena Park, Calif. [. . . ]