B&K ST125.1 Owner's Manual - Purpose and Function
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PURPOSE AND FUNCTION
The ST125.3 (three channel), ST125.2 (two channel) and ST125.1 (mono) are high power amplifiers that are
designed for use in all types of audio or audio/video systems.
DESIGN AND
CONSTRUCTION
The ST125.3, ST125.2 and ST125.1 amplifiers utilize high quality electronic circuitry to achieve an environment
wherein a detailed, transparent, and highly musical sound can be realized. The high quality parts complement
includes: state-of-the-art solid state devices, 1% metal film resistors, computer grade electrolytic power supply
capacitors, and a high capacity toroidal transformer.
The ST125.3, ST125.2 and ST125.1 operate with a class A predriver and AB MOSFET power output stages.
These high power amplifiers are capable of delivering their full rater power while reproducing the most demanding
music passages effortlessly into the most demanding audiophile speakers.
FEATURES
Control Output
- one 3.5 mm 12 VDC @ 125 mA output for turning on amplifiers and controlling external
systems such as a projection screen or B & K amplifier.
Control Input
- one 3.5 mm jack that allows standby on/off with a 5-24 VDC control signal.
Gold Plated Connectors -
better sound with minimum signal loss and degradation.
Toroidal Transformer -
Efficient, high current, shielded transformer that supplies the amplifier with a clean and
constant supply of power, even during highly demanding source material passages.
Discrete Circuitry -
Dynamically provides a full, accurate, and three dimensional reproduction of source material
.
Class A Predriver -
Improves low level detail and clarity for smoother, more musical sound.
AB MOSFET Output Stage -
Provides efficient and linear power delivery, as well as protection from thermal
overload.
1% Metal Film Resistors -
Higher quality resistors for lower noise, better sound, and a greater degree of
repeatability.
High Current -
Ability to cleanly, accurately, and reliably reproduce demanding recordings or source materials
into low impedance drivers and speaker systems.
Computer Grade Capacitors -
Large capacity computer grade electrolytic capacitors for extended low frequency
control, increased power supply, and improved dynamics.