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B&K ST140M manual

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Table of contents for the manual

  • Page 1

    ST140M Sin g le Channel Amplifier OWNER’S MANUAL B & K Components Ltd. 12999 rev 0005[...]

  • Page 2

    12999 rev 0005 B&K Components, Ltd., 2100 Old Union Road, Buffalo, New York 14227[...]

  • Page 3

    Page 1 12999 rev 0005 Table of contents Safety Precautions Page 2 Purpose and function Page 3 Design and construction Page 3 Features Page 3 Rear panel view Page 4 Rear panel description Page 4 - 5 Control muting Page 5 - 6 Level controls Page 6 Outputs Page 7 Inputs Page 8 System installation Page 9 Making the connection Page 9 - 10 Troubleshootin[...]

  • Page 4

    Page 2 12999 rev 0005 SAFETY PRECAUTIONS PLEASE READ BEFORE INSTALLING WARNING: TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE. The li g htnin g flash with arrowhead, within an equilateral trian g le, is intended to alert the user of the presence of uninsulated “dan g erous volta g e” within the product’s enclosu[...]

  • Page 5

    Page 3 12999 rev 0005 The The ST140M's purpose and function The ST140M is a compact, very efficient, single channel power amplifier. It is designed to be used in all types of audio or audio/video systems. Design and construction The ST140M utilizes high quality electronic circuitry to achieve an environment wherein a detailed, transparent, and[...]

  • Page 6

    Page 4 12999 rev 0005 Rear Panel View 1. AC fuse holder 5. RCA input (unbalanced) 2. AC Input receptacle 6. Level controls** 3. Speaker outputs 7. Amplifier control muting input/output 4. Balanced Input ** OPTIONS AVAILABLE FOR THE ST140M AMPLIFIER Rear panel description 1. AC fuse holder - Holds the AC Line fuse. This fuse is an 8 Amp / 250 Volt S[...]

  • Page 7

    Page 5 12999 rev 0005 6. Level controls - Option available for the ST140M amplifier. For adjusting the input level to the amplifier. Explained further on page 6. 7. Amplifier control muting input/output - To provide remote switching of mute on/off of the amplifier. Explained further below. Control muting A control is provided on each ST140M amplifi[...]

  • Page 8

    Page 6 12999 rev 0005 )LJXUH& 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 cont[...]

  • Page 9

    Page 7 12999 rev 0005 )LJXUH' Outputs Five wa y bindin g posts are provided. One pair for each channel. The y are desi g ned to accept a banana-t y pe plu g or spade lu g connector (shown below) and are color coded for eas y identification. The red (+) post should alwa y s be connected to the speakers (+) jack. The black (-) post should alw[...]

  • Page 10

    Page 8 12999 rev 0005 Inputs Unbalanced - RCA type connectors accept line input from the preamplifier’s unbalanced output connectors. There are two input connectors, that may be used to connect the amplifier to the preamplifier. The Channel 3 input is used for normal operation. RCA cable connector - Operation - For unbalanced operation, ensure th[...]

  • Page 11

    Page 9 12999 rev 0005 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 re[...]

  • Page 12

    Page 10 12999 rev 0005  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 ri g ht front output of your preamplifier to channel 1 input on the amplifier, remember to connect your ri g ht front speaker wire[...]

  • Page 13

    Page 11 12999 rev 0005 Troubleshooting PROBLEM POSSIBLE CAUSE POSSIBLE SOLUTION No sound (‘on’ LED not illuminated) 1. Power cord not plu gg ed in. 2. Power off at AC source. 3. AC power inlet fuse blown or faulty. 4. Control switch in the wron g position. 1. Reconnect power cord. 2. Check AC switch or fuse. 3. Check for shorts or overloadin g [...]

  • Page 14

    Page 12 12999 rev 0005 ST140M SPECIFICATIONS Power rating: 8 ohms 170 watts @ 1 kHz 4 ohms 225 watts @ 1 kHz Frequency response 5 Hz - 45 kHz Input sensitivity 1.4 Volts THD (S+N) 0.09 % @ 1 kHz Input impedance 33.2 k ohms Damping factor 180 Current (peak to peak) 60 Amps Slew rate 14 V / ) sec Dynamic headroom 1.5 dB S/N (A-weighted) 95 dB Voltage[...]

  • Page 15

    Page 13 12999 rev 0005 Limited Warrant y B&K Components Ltd., referred to herein as B&K, warrants your B&K equipment a g ainst all defects in material and workmanship for a period of five years from the date of purchase. This warranty applies only to the ori g inal purchaser and only to equipment in normal residential use and service. D[...]

  • Page 16

    12999 rev 0005 B&K Components, Ltd. 2100 Old Union Road Buffalo, New York 14227 716-656-0023 www.bkcomp.com[...]