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13000 rev 0005

The ST3140's purpose and function

The ST3140 is a compact, very efficient, three channel power amplifier.  It is designed
to be used in all types of audio or audio/video systems.  

Design and construction

The ST3140 utilizes high quality electronic circuitry to achieve an environment wherein
a detailed, transparent, and highly musical sound can be realized.  The high quality
parts complement include state-of-the-art solid state devices, 1% metal film resistors,
computer grade electrolytic power supply capacitors, and a high capacity toroidal
transformer.

The ST3140

 

operates class A predriver and AB high current MOSFET power output

stages.  It is capable of reproducing the most demanding audio signals at rated power
levels. 

Features

Toroidal Transformers

 - Efficient high current transformer for improved dynamics.

Discrete Circuitry

 - More accurate and three dimensional reproduction of source

material.

Class A Predriver

 - Improves low level detail for smoother, more musical sound.

AB MOSFET Output Stage

 - For efficient and linear power delivery.

Limited Protection

 - Provides short term protection from accidental shorting of output

devices and protection from thermal overload.

Gold Plated Connectors

 - Improve connections for better sound and minimized signal

loss and degradation.

1% Metal Film Resistors

 - Low noise resistors for better sound and a greater degree of

repeatability.

High Current

 - Ability to reproduce demanding recordings.

Computer Grade Capacitors

 - Large capacity computer grade electrolytic capacitors

for extended low frequency control and improved dynamics.

Summary of Contents for ST3140

Page 1: ...ST3140 Three Channel Amplifier OWNER S MANUAL B K Components Ltd 13000 rev 0005...

Page 2: ...13000 rev 0005 B K Components Ltd 2100 Old Union Road Buffalo New York 14227...

Page 3: ...es 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 7 8 System installation Page 8 Making the connection Page 9 Tr...

Page 4: ...ct Damage can occur to your speakers if the power rating of each individual driver is exceeded by the amplifier Ensure that all the drivers in your speaker system are capable of handling not only the...

Page 5: ...ost demanding audio signals at rated power levels Features Toroidal Transformers Efficient high current transformer for improved dynamics Discrete Circuitry More accurate and three dimensional reprodu...

Page 6: ...ption 1 AC fuse holder Holds the AC Line fuse This fuse is an 8 Amp 250 Volt Slow Blow fuse Replace with same type and value fuse only 2 AC Input receptacle For attaching the supplied AC power cord to...

Page 7: ...being controlled the control signal can be extended to include each successive unit by simply running a 3 5mm mini jack cable from the CTRL OUT connector of the first amplifier to the CTRL IN connecto...

Page 8: ...ute No Signal No Signal IN Sound Signal Note The control voltage is for muting control only Each amplifier must be connected to its own source of AC power in order for it to operate Level controls The...

Page 9: ...red post should always be connected to the speakers jack The black post should always be connected to the speakers jack Spade connector Banana jack Here is a typical amplifier setup Inputs Unbalanced...

Page 10: ...of safety they should also be kept out of traffic areas 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...

Page 11: ...ker wires to channel 1 s outputs Always observe polarity when connecting speakers connect amplifiers to the speakers and amplifiers to speakers Double check all connections Plug the amplifier s power...

Page 12: ...or replace cable 4 Check all switch settings Sound lacks direction bass weak 1 Speakers connected out of phase 1 Check connections making sure that cables are connected to and to Loud hum or buzz on...

Page 13: ...dance 33 2 k ohms Damping factor 100 Current peak to peak 30 Amps Slew rate 14 V sec Dynamic headroom 1 0 dB S N A weighted 95 dB Voltage gain 28 Line voltage 120 220 240 VAC switchable Dimensions O A...

Page 14: ...rms of this warranty and B K shall not be liable for any incidental or consequential damage arising out of a defect in material or workmanship of the unit during the terms of this warranty or thereaft...

Page 15: ...13000 rev 0005 B K Components Ltd 2100 Old Union Road Buffalo New York 14227...

Page 16: ...13000 rev 0005 B K Components Ltd 2100 Old Union Road Buffalo New York 14227 716 656 0023 www bkcomp com...

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