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Summary of Contents for B&K ST260
- Page 1 ST260 Two Channel Amplifier OWNER’S MANUAL B & K Components Ltd. 12997 REV 050500...
- Page 2 B&K Components, Ltd., 2100 Old Union Road, Buffalo, New York 14227...
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Page 3: Table Of Contents
Table of contents Safety Precautions Purpose and function Design and construction Features Rear panel view Rear panel description Control muting Level controls Inputs Outputs Internal Bus Jumper description Mono application Bridged application System installation Making the connection Troubleshooting Care and cleaning Specifications Warranty Accessories included:... -
Page 4: Safety Precautions
Turn amplifier ‘off’ when plugging in or unplugging input and speaker cables!!! The ST260 is equipped with raised feet so that continuous ventilation can be maintained. They help to maintain acoustic feedback into the amplifier at a minimum. -
Page 5: Purpose And Function
The ST260's purpose and function The ST260 is a compact, very efficient, two channel power amplifier. It is designed to be used in all types of audio or audio/video systems. The term versatile is almost adequate to describe the variance of operational modes the ST260 is capable of providing. -
Page 6: Features
Toroidal Transformer - Efficient high current transformer for improved dynamics. Discrete Circuitry - More accurate and three dimensional reproduction of source material. Limited Protection - Provides short term protection from accidental shorting of output devices and protection from thermal overload. Gold Plated Connectors loss and degradation. -
Page 7: Rear Panel Description
The preamplifier’s control output, such as is provided with B&K series preamplifiers, can be utilized to provide a control signal to the ST260. If more than one amplifier is being controlled, the control signal can be extended to include each successive unit by simply running an RCA type audio cable from the CTRL OUT connector of the first amplifier to the CTRL IN connector of the next unit (commonly referred to as ‘daisy chaining’). -
Page 8: Level Controls
If the control function is desired, each unit in the system must remain connected at all times and the control must be enabled. To enable the control function, the CTRL ENABLE button must be out for each controllable amplifier in the system. For more information on the amplifiers output status under various control conditions, refer to the table below. -
Page 9: Inputs
Example: When using 4 ohm and 8 ohm speakers together, the 4 ohm may sound louder then 8 ohm at a given volume level. The level controls on the amplifier are used to match the speakers volume level. Clockwise will increase the output. Counter clockwise will decrease the output. -
Page 10: Outputs
Outputs Five way binding posts are provided. One pair for each channel. They are designed to accept a banana-type plug or spade lug connector (shown below) and are color coded for easy identification. The red (+) post should always be connected to the speakers (+) jack. -
Page 11: Internal Bus
Below is the default setup for the ST260 amplifier. By arranging the jumpers allows you to configure the amplifier for different applications. If you wish to use the amplifier as a stereo (two channel) amplifier, you need not change any of the settings. - Page 12 Along with being the left channel input, it is used as the input to the left bus and the left source for the ‘L+R BUS’. Because it is a BUS input, any signal input here will appear at the ‘L BUS’ jumper terminal for both of the ST260’s jumper modules.
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Page 13: Mono Application
Place the volume group jumper for both channels on the ‘NO VOL’ jumper terminal. The speaker output terminals on the ST260’s rear panel must be paralleled in order to complete the setup. Simply connect the (+) terminals for both channels together using a jumper wire (not supplied with the amplifier). -
Page 14: Bridged Application
Bridged application (High voltage) The ST260 may be bridged to drive a high impedance speaker. To use, place the source group jumper for both channels on the ‘L BUS’ jumper terminal. Place the volume group jumper for both channels on the ‘NO VOL’ jumper terminal. Place the jumper module on the ‘-L’... -
Page 15: System Installation
There will most likely be a number of cables involved in the installation of your home entertainment system. Pre-planning is essential in order to maximize system efficiency. We recommend the following as a means of helping you reach that goal: Make a diagram of your proposed system by laying out the relative location of each component in the system. - Page 16 Connect the wires from your speakers to the appropriate output on the amplifier. It is absolutely essential that you observe correct polarity in these connections. Example: If you connect your right output of your preamplifier to R channel input on the amplifier, remember to connect your right front speaker wires to R channel outputs.
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Page 17: Troubleshooting
PROBLEM No sound (‘on’ LED not illuminated) No sound on some or all selected channels (‘on’ LED illuminated) Sound lacks direction, bass weak Loud hum or buzz on one or more channels Channel sounds distorted and low in output ** Note : If unit continues to blow power inlet fuses, FUSE!!, have it serviced... -
Page 18: Specifications
ST260 SPECIFICATIONS Power rating: 8 ohms 4 ohms Frequency response Input sensitivity THD (S+N) Input impedance Damping factor Current (peak to peak) Slew rate Dynamic headroom S/N (A-weighted) Voltage gain Line voltage Dimensions (O.A.) Weight Power consumption Replacement fuses 60 watts @ 1 kHz... -
Page 19: Warranty
B&K Components Ltd., referred to herein as B&K, warrants your B&K equipment against all defects in material and workmanship for a period of five years from the date of purchase. This warranty applies only to the original purchaser and only to equipment in normal residential use and service. Defective equipment must be returned to B&K, prepaid, accompanied by sufficient payment to cover the cost of return shipping and handling, and will be repaired or replaced at the discretion of B&K whose decision as to the method of reparation will be final. - Page 20 B&K Components, Ltd. 2100 Old Union Road Buffalo, New York 14227 716-656-0023 www.bkcomp.com...
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