User manual B&K REFERENCE 125.7

[. . . ] B & K Components, Ltd. User Manual REFERENCE 125. 5 S2 REFERENCE 125. 7 S2 Five or Seven Channel Amplifier 13740 0604 ii USER MANUAL - REFERENCE 125. 5 S2, REFERENCE 125. 7 S2 © 2004 B & K Components Ltd. All rights reserved. The information in this manual is copyright protected. No part of this manual may be copied or reproduced in any form without prior written consent from B & K Components, Ltd. B & K Components Ltd. SHALL NOT BE LIABLE FOR OPERATIONAL, TECHNICAL OR EDITORIAL ERRORS/OMISSIONS MADE IN THIS MANUAL. [. . . ] The Reference 125. 5 S2 or Reference 125. 7 S2 operates with a class A predriver and AB MOSFET power output stages. These high power amplifiers are capable of delivering full range while reproducing the most demanding music passages effortlessly into the most demanding audiophile speakers. FEATURES High Current - Ability to cleanly, accurately, and reliably reproduce demanding recordings or source materials into low impedance drivers and speaker systems. Class A Predriver - Improves low level detail and clarity for smoother, more musical sound. AB MOSFET Output - Provides efficient and linear power delivery, as well as protection from thermal overload. Gold Plated Connectors - Improved sound with minimum signal loss and degradation. Five Way Binding Posts - High quality binding posts accommodate up to 4 gauge wire. Control Output - One 3. 5mm (1/8") 10-12 VDC @ 200 mA output for controlling other amplifiers or controlling external systems that use a voltage trigger. Control Input - One 3. 5mm (1/8") jack that allows standby on/off with a 5-24 VDC control signal. 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. 1% Metal Film Resistors - High quality resistors used in all active circuitry to reduce noise and obtain better sound purity. Computer Grade Capacitors - Large capacity computer grade electrolytic capacitors for extended low frequency control, increased power supply, and improved dynamics. Balanced Inputs - Balanced inputs deliver the quietest and most accurate signal path between the preamplifier and amplifier. Full Power Operation - Capability to operate at full power with a square wave input. Differential Input Stage - A current source load assures DC stability and wide bandwidth linearity. These connectors accept balanced output from the preamplifier's balanced output connectors. Balanced Interconnect Cable PIN 1 (GND) 1 3 Amplifier Balanced Input Connector PIN 2 (+) 2 3 1 PIN 2 (+) 2 PIN 1 (GND) PIN 3 (-) PIN 3 (-) RCA UNBALANCED There are five unbalanced (RCA) input connectors on the Reference 125. 5 S2 and seven unbalanced (RCA) input connectors on the Reference 125. 7 S2. These connectors accept an unbalanced (RCA) output from the preamplifier's (RCA) volume level outputs. Ground Signal RCA connector 6 INPUT/OUTPUT CONNECTIONS Use either RCA unbalanced or XLR balanced to connect the preamplifier to amplifier. RCA Unbalanced Connections SURROUND LEFT SURROUND BACK LEFT FRONT LEFT CENTER FRONT RIGHT SURROUND RIGHT SURROUND BACK RIGHT CONTROL I/O CONTROL IN ALLOWS AMPLIFIER OPERATION WHEN A 5-24V SIGNAL IS APPLIED WITH A 3. 5mm MINI JACK INPUT 1 R I N G + 1 2 V LO W P O W E R INPUT 2 INPUT 3 INPUT 4 INPUT 5 INPUT 6 INPUT 7 SLEEVE GROUND CTRL IN CTRL OUT 12VDC 200mA TIP +12V CTRL ENABLE XLR (BALANCED) XLR (BALANCED) XLR (BALANCED) XLR (BALANCED) RCA (UNBALANCED) RCA (UNBALANCED) RCA (UNBALANCED) RCA (UNBALANCED) BUTTON OUT BUTTON OUT OR CONTROL I/O CONTROL IN ALLOWS AMPLIFIER OPERATION WHEN A 5-24V SIGNAL IS APPLIED WITH A 3. 5mm MINI JACK BUTTON OUT BUTTON OUT INPUT 1 R I N G + 1 2 V LO W P O W E R INPUT 2 INPUT 3 INPUT 4 INPUT 5 INPUT 6 INPUT 7 SLEEVE GROUND CTRL IN CTRL OUT 12VDC 200mA TIP +12V CTRL ENABLE XLR (BALANCED) XLR (BALANCED) XLR (BALANCED) XLR (BALANCED) RCA (UNBALANCED) RCA (UNBALANCED) RCA (UNBALANCED) RCA (UNBALANCED) BUTTON PUSHED IN BUTTON PUSHED IN BUTTON PUSHED IN BUTTON PUSHED IN SURROUND LEFT SURROUND BACK LEFT FRONT LEFT CENTER FRONT RIGHT SURROUND RIGHT SURROUND BACK RIGHT XLR Balanced Connections SPEAKER OUTPUTS Binding posts are provided for speaker connections. There is one pair provided for each amplifier channel output. They are designed to accept a banana-type plug, spade-lug connector (shown right), terminal posts, or bare wire. They are color coded for easy identification. The positive (+) RED post should always be connected to the speakers (+) RED jack. The negative (-) BLACK post should always be Spade Connector connected to the speakers (-) BLACK jack. CONTROL IN ALLOWS AMPLIFIER OPERATION WHEN A 5-24V SIGNAL IS APPLIED WITH A 3. 5mm MINI JACK Banana Jack CHANNEL 1 OUTPUT CHANNEL 2 OUTPUT CHANNEL 3 OUTPUT CHANNEL 4 OUTPUT CHANNEL 5 OUTPUT CHANNEL 6 OUTPUT CHANNEL 7 OUTPUT POSITIVE N E G AT I V E POSITIVE N E G AT I V E POSITIVE N E G AT I V E POSITIVE N E G AT I V E POSITIVE N E G AT I V E POSITIVE N E G AT I V E POSITIVE CAUTION AC LINE RISK OF ELECTRIC SHOCK DO NOT OPEN SERIAL # H i g h Pe r f o r m a n c e Audio/Video Systems Hand-Made in the U. S. A. )+( )-( )+( )-( )+( )-( )+( )-( )+( )-( )+( )-( )+( Surround Back Left Surround Left Front Left Center Front Right Surround Right Surround Back Right SE FU SE FU SE FU SE FU SE FU SE FU SE FU Shown right is the amplifier to speaker connections (4 gauge (AWG) wire maximum). R I N G + 1 2 V LO W P O W E R TIP +12V CTRL ENABLE SLEEVE GROUND CTRL IN CTRL OUT 12VDC 200mA XLR (BALANCED) CHANNEL 1 INPUT CHANNEL 2 INPUT CHANNEL 3 INPUT CHANNEL 4 INPUT CHANNEL 5 INPUT CHANNEL 6 INPUT CHANNEL 7 INPUT XLR (BALANCED) XLR (BALANCED) XLR (BALANCED) RCA (UNBALANCED) RCA (UNBALANCED) RCA (UNBALANCED) RCA (UNBALANCED) CONTROL I/O FUSE C AU T I O N : F O R C O N T I N U E D PROTECTION AGAINST RISK O F F I R E R E P L A C E O N LY W I T H S A M E T Y P E A N D R AT I N G . SE F SE F SE F SE F SE F SE F SE F USE USE USE USE USE USE USE FU U FU FU FU U FU FU FU N E G AT I V E )-( SYSTEM INSTALLATION There will most likely be a number of cables involved in the installation of your home entertainment system. [. . . ] For more information on the amplifier's output status under various control conditions, refer to the table below. *Note: The control input voltage is intended for standby on/off control only. For best amplifier operation, each amplifier is recommended to have its own source of AC power. Operational Outline Hardware (3. 5mm) Not Connected Connected Connected @ CTRL IN No Voltage No Voltage Voltage Output Status Sound No Sound Sound @ CTRL OUT +12V 0V +12V TROUBLESHOOTING PROBLEM No sound (power 'on' LED not illuminated). [. . . ]