Instruction/ maintenance manual of the product ST55.2 B&K
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P/N13436 0702 B&K SB ! IMPL Y ETTER B&K Components, Ltd. ST55.2 OWNER’S MANUAL.
ii 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.
iii TABLE OF CONTENTS Table of Contents .............................................................................................................. ......................................iii Safety Pr ecauti ons .....................................
1 SAFETY PRECAUTIONS PLEASE READ BEFORE INSTALLING WARNING: to prevent fire or sh ock hazard, do not expose this unit to rain or moisture. Car e should be taken to prev ent objects or liquid from entering th e enclos ure. Never handle the po wer cord with wet hands.
2 PURPOSE AND FUNCTION The ST55.2 is a compact, very efficient, two channel power am plifier. It is designed for use in all types of audio or audio/video systems. The term versatile is al most adequate to describe the va riance of operational modes the ST55.
3 REAR PANEL R LEVEL L LEVEL HI LO HI LO BUS INPUT LEFT RIGHT LEFT RIGHT MONO BUS OUTPUT WHEN SWITCH IS SET TO ENABLE, THE AMPLIFIER WILL ONL Y OPERATE WHILE A 5-24VDC SIGNAL IS APPLIED TO CTRL IN WHE.
4 CONTROL MUTING A control is provided on each ST55.2 amplifier to allow re mote switching of mute on/off. The preamplifier’s cont rol output, such as is provided with B&K seri es preamplifiers, can be utilized to provide a contro l signal to the ST55.
5 LEVEL CONTROLS There are two level controls on the back of the amplifier. One level control for each channel. Whe n using the level controls, first start with them turned al l the way up (c lockwise). Then a djust them according to your system requirements to match the sound l evel coming from ea ch speaker.
6 Here is a typical amplifier setup: MINUS PLUS PLUS MINUS RIGHT LEFT Channel 1 (-) (+) (-) (+) Channel 2 INTERNAL BUS STRUCTURE In order to gain access to the internal bu s structure, you must first remove the top cover. Tu rn the amplifier so the rear panel is facing your.
7 MINUS PLUS PLUS MINUS RIGHT LEFT (-) (+) NOT USED RB U S L+R BUS LB U S NO VOL USE VOL JUMPER DESCRIPTION The jumper modules are used in configuring e ach channel. Each jumper termin al location is conveniently labeled as to the source it can be configured to provi de.
8 BRIDGED APPLICATION (HIGH VOLTAGE) The ST55.2 may be bridged to drive a high impedance spe aker. To use, place the source g roup jumper for both channels on the ‘L BUS’ j umper terminal. Place the volume group jumper for both channels on the ‘ NO VOL’ jumper terminal.
9 SYSTEM INSTALLATION There will most likely be a num ber of cables involved in the installation of your home entertainment system. Preplanning is essential in order to ma ximize system efficiency. We recommend the follo wing as a means of helping you reach that goal.
10 TROUBLESHOOTING PROBLEM POSSIBLE CAUSE POSSIBLE SOLUTION No sound (‘on’ LED not illuminated) 1. Power cord not plugged in. 2. Power off at AC source. 3. AC power inlet fuse blown or faulty 4. Control Input not activated. 1. Reconnect power cord.
11 SPECIFICATIONS Power Rating: 8 ohms 4 ohms 55 watts @ 1 kHz Not recommended THD (S+N) 0.09 % @ 1 kHz Frequency response 5 Hz – 45 kHz Input sensitivity 0.77 Volts Input impedance 33.2 k ohms Damping factor 100 Current (peak to peak) 20 Amps Slew rate 14 V / sec Dynamic headroom 1.
12 LIMITED WARRANTY B & K Components Ltd., referred to herein as B & K, warrants your B & K equipment against all d efects in material and workmanship for a period of five years from the date of purchase. This warranty applies o nly to the original purchaser and only to equip ment in normal residential use and service.
13 WWW.BKCOMP.COM B&K Components, Ltd. 2100 Old Union Road Buffalo, New York 14227 Phone: 716 – 656 - 0026.
An important point after buying a device B&K ST55.2 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought B&K ST55.2 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data B&K ST55.2 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, B&K ST55.2 you will learn all the available features of the product, as well as information on its operation. The information that you get B&K ST55.2 will certainly help you make a decision on the purchase.
If you already are a holder of B&K ST55.2, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime B&K ST55.2.
However, one of the most important roles played by the user manual is to help in solving problems with B&K ST55.2. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device B&K ST55.2 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
