User manual B&K ST125.1

[. . . ] ST125. 3 ST125. 2 ST125. 1 Owner's Manual P/N13437 0702 B&K B&K Components, Ltd. , 2100 Old Union Road, Buffalo New York 14227-2725 Phone 1-800-543-5252 or (716) 656-0026, Fax (716) 656-1291 E-mail: info@bkcomp. com Web: www. bkcomp. com ii TABLE OF CONTENTS Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Purpose and Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Design and Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Speaker Fuses - for protection against amplifier damage in the case of shorted speaker wires. On the ST125. 1 mono amplifier, all outputs remain fused independently. Balanced Input - for connecting signal patch cables (interconnects) from the preamplifier to the amplifier. On the ST125. 1 mono amplifier, channels 2 and 3's XLR Balanced connections are not available. Balanced/Unbalanced Input Select - this switch is used to configure an AMPLIFIER PAIR for use as either balanced (XLR) or RCA unbalanced line inputs. This switch controls two amplifier channels and allows signal patch cables (interconnects) to be sourced from either balanced or unbalanced, preamplifier/processor or line outputs. On the ST125. 1 mono amplifier, channels 2 and 3's Balanced/Unbalanced Input Selectors, are not available. RCA Input - for connecting signal patch cables (interconnects) from the preamplifier to the amplifier. On the ST125. 1 mono amplifier, channels 2 and 3's RCA Unbalanced connections are not available. Amplifier Control Input/Output - provides remote switching of the amplifier's standby on/off feature. Explained further on page 8. 3 E FU E FU E FU CAUTION: FOR CONTINUED PROTECTION AGAINST RISK O F F I R E R E P L A C E ON LY WI T H S A M E T Y P E A N D R AT I N G . SE SE SE FUSE FUSE FUSE 4 B&K Components, Ltd. Made in the U. S. A. www. bkcomp. com * FUS FUS FUS MINUS - LEVEL ADJUSTMENT Generally in a home theater application, volume level is controlled by the A/V surround processor. Make a diagram of your proposed system by laying out the relative location of each component in the system. Number each cable and record its length on the diagram for future use. Cable runs are critical in that they must be kept away from the sources of power radiation (amplifiers, power cords, heaters, appliances, etc. ). The process of optimizing the system will include the type of cable, the length of the run, and the obstructions it must deal with along its run. Your dealer can advise you on the products available and their relative merits. If building custom length audio cable is not your strength, you dealer should be able to help you with that as well. When possible, use a separate AC power line for the amplifier, one that is not shared by any other household component. Tip: Take a piece of string (longer than the longest cable run) and mark it at each foot of length. Then do a mock cable run using the string, dressing it neatly along the way. Count the divisions to the next full foot, and add one foot to all for some movement of the components. This will provide you with ideal cable length. MAKING THE CONNECTION Before doing anything, insure that the power switch on the amplifier's front panel is in the `off' position. [. . . ] Over time you may wish to clean the exterior of the unit by wiping it with a damp cloth to remove any dirt or dust that accumulates on it. Unplug the amplifier and be sure that it has completely powered down before you apply any damp cloth. Do not let any liquid enter the amplifier through the vents in the top cover. You may clean the connectors on the back panel with isopropyl alcohol annually. 9 SPECIFICATIONS Power Rating: 8 ohms - ST125. 3/ST125. 2/ST125. 1 4 ohms - ST125. 3/ST125. 2/ST125. 1 THD (S+N) Frequency response Input sensitivity RCA unbalanced Input sensitivity XLR balanced Input impedance Damping factor - ST125. 3/ST125. 2/ST125. 1 Current (peak to peak) - ST125. 3/ST125. 2/ST125. 1 Slew rate Dynamic headroom - ST125. 3/ST125. 2/ST125. 1 S/N (A-weighted) Voltage gain Line voltage Dimensions (O. A. ) Weight Power consumption 140/140/170 watts @ 1 kHz 185/185/225 watts @ 1 kHz 0. 09 % @ 1 kHz 5 Hz ­ 45 kHz 1. 4 Volts 2. 8 Volts Pin 1 = Gnd, 2 = In +, 3 = In 33. 2 k ohms 100/100/180 30/30/60 Amps 14 V / sec 1. 0/1. 4/1. 5 dB 95 dB 28 120/220/240 VAC switchable 17"(w) X 16"(d) X 5. 75"(h) 37 lbs. [. . . ]