Balanced Audio Technology REX II Bedienungsanleitung

REX II

WARRANTY REGISTRATION FORM

Unit Serial Number:

_______________________________________

Customer Name:

_______________________________________

Address:

_______________________________________

Date of Purchase:

_______________________________________

Purchased From:

Dealer Name:

_______________________________________

Address:

_______________________________________

IMPORTANT NOTE:

In order to receive the full five year product warranty, please mail

this completed form together with a copy of your sales receipt to

Balanced Audio Technology at the address below, within thirty days

of purchase.

Failure to do so will result in the product being warrantied for one

year from the date of manufacture.

1300 First Stat Blvd. Suite A Wilmington DE 19804 Tel: 302-999-8855 Fax: 302-999-8818

REX II

Vacuum Tube

Balanced Stereo Preamplifier

Owner's Manual

1300 First Stat Blvd. Suite A Wilmington DE 19804 Tel: 302-999-8855 Fax: 302-999-8818

TABLE OF CONTENT

CURRENT SOURCES 4

CHANGING CURRENT SOURCES 5

AC SHUNT VOLTAGE REGULATORS 6

INTRODUCTION 7

Package Content 7

Physical Placement 8

Configuring the REX II 8

Connecting to your system 9

FRONT PANEL CONTROLS 10

REX II Power On sequence 10

Turning the REX II Off 108

PHASE Button and LED 11

MONO button and LED 11

MUTE button and LED 11

INPUT selection 11

VOLUME knob 11

DISPLAY format 12

FUCTION button 12

DISPLAY Brightness function 13

MUTE function 13

REX II PROGRAMMABLE FUNCTIONS 14

Parameter Definitions 15

PROGRAMMING THE REX II 15

BALANCE adjustment 15

VOLUME offsets 16

PHASE 17

MONO/STEREO 17

MAXIMUM gain 17

FIXED gain 18

DISPLAY MODE 18

INPUT NAME 19

REMOTE CONTROL FUNCTIONS 20

Volume Up/Down 20

Mute 20

Fade 20

Input 20

Display/Power 21

Fuse Protection 21

Servicing 21

Cleaning 21

RESETTING THE REX II 22

WARRANTY 23

Vacuum Tube Current Sources in REX II

Your REX II incorporates a unique feature that allows you to optimize its sound to tailor it to your

individual taste or system requirements.

The Vacuum Tube current sources incorporated in the REX II, being part of the signal gain stage, have a

direct effect on the unit’s sound. Changing the tube type used in that circuit allows the user an extra

degree of control over the sound of the unit.

In its standard configuration the REX II current sources use the Russian 6C19 tubes. That tube is

basically a miniature version of the famous 6C33 tube, and provides, in our view, the best combination

of sonic characteristics and electrical performance.

However, the unique design of the REX II allows you to also use other tube types in that application.

Currently, the user has the following three choices for vacuum tube Current Sources:

1. The standard 6C19 tube current source as installed from the factory.

2. The 6H30 SuperTube current source which requires the purchase of the X-PAK accessory.

3. The 5881 tube current source.

NOTE: There are TWO Current Sources in REX II, located in the Power Module.

The REX II X-PAK accessory includes two current source boards.

In order to change the tube type the user needs to remove the installed Current Source boards, and replace

them with either another type, designed for a particular tube type, or install the 5881 tubes as a direct plug-in.

Only the 5881 tubes can be used directly upon the removal of the 6C19 current source board.

Please consult the factory regarding options for other tube types that may be available in the future.

WARNING:

The following procedure should only be performed by qualified personnel

To change the current source:

1. Turn the unit OFF and wait at least 5 minutes to allow the tubes to cool down and the power

supply charge to dissipate. Remove the Power Module top cover.

2. Remove the six screws holding each current source board.

3. Pull the current source boards straight up to disengage its connectors.

4. Install the new current source boards making sure their connectors are properly aligned. Boards

will be positioned properly when the mounting holes in the circuit boards align with the standoffs.

5. Install the six mounting screws.

6. Turn the unit ON.

AC SHUNT VOLTAGE REGULATORS

The REX II preamplifier incorporates another feature that allows the user to optimize its sound – the

AC Shunt voltage regulators.

The AC Shunt voltage regulators perform the final “cleaning” of the REX II power supply rails.

They work to reduce the minute fluctuations in the DC voltages that may degrade the sound.

The AC Shunt Voltage Regulators are located in the REX II Power Module.

They incorporate two types of vacuum tubes, user selectable for the desired sound: 6C45 and 6H30.

To change the AC Shunt tube type remove the Power Module top cover and move the board-mounted

switch S1 to desired position. The switch is located close to the center of the board.

Only the selected tubes will have their filaments running at any time.

INTRODUCTION

Thank you for your purchase of the Balanced Audio Technology REX II

preamplifier. Please read this owner's manual to obtain the full benefit of the REX II

in your system. It will provide you with the needed safety information and

operating procedures for this exceptional unit.

WARNINGS:

To prevent the possibility of serious injury, electrical shock or fire:

DO NOT operate with the cover removed.

DO NOT expose to rain or moisture.

DO NOT defeat the ground power-plug.

DO NOT replace fuse with anything other than the same type and rating as supplied

by the factory.

Package Contents

Included in the box set should be the following:

Description Quantity

REX II Control Module 1

REX II Power Module 1

Power Cord 2

Spare Fuse 2

Torx Wrench (T-15) 1

Spare Top Cover Screws 1 10

User’s Manual 1

VK-R3 Remote Control (If ordered)

Save all the packaging material in a safe dry area for the unlikely event that

you need to return the REX II to the factory for service.

PHYSICAL PLACEMENT

It is recommended that you provide at least 6" of free space around each module

comprising the REX II preamlifier for proper ventilation.

Mount the modules on a hard surface with proper ventilation underneath.

Do not stack the REX II preamplifier on top of other units, nor vice versa.

WARNING

Stacking the modules (putting the Control Module on top of

the Power Module) is NOT permitted.

CONFIGURING THE REX II PREAMPLIFIER SYSTEM

The REX II preamplifier system consists of two modules.

Control Module performs all the control functions associated with the

duties of the preamplifier in your system. It also receives and processes the

remote control commands.

Power Module works in conjunction with the Control Module as an outboard

power supply.

The two modules are connected by two detachable cables. In addition each module

has its own power cord that must be plugged into the power outlet.

WARNING

Make sure your REX II is powered DOWN before making or

changing ANY connections between its two modules, to the

source components or power amplifiers.

Connect the two detachable cables between the modules, making sure the channels

are connected properly.

Plug the two power cords into power receptacles.

Make all the signal connections.

CONNECTING THE REX II TO YOUR SYSTEM

Balanced Components

Use balanced XLR interconnects. All input and output connectors are clearly

marked on the back panel.

Note: The REX II XLR connectors are wired as follows:

Pin 1: common/shield

Pin 2: positive

Pin 3: negative

For the REX II, use the Main 1 XLR Output for connection to your balanced power

amplifier. The Output 2 is configured as an RCA connector output.

Single-Ended Components

Single-ended components have RCA connectors. The REX II preamplifier is

designed to work with balanced interconnects only. If single ended components

need to be connected to the preamplifer, then the RCA/XLR adapters should be

used. These adapters are available from an authorized Balanced Audio Technology

dealer at a nominal charge.

Two types of adapters are available:

Input Adapters: RCA Female to XLR Male

Output Adapters: RCA Female to XLR Female.

REX II FRONT PANEL CONTROLS

STANDBY Button and LED

The Standby button is used to turn the unit ON and OFF and to switch the

preamplifier into its Standby mode. The LED indicates the status of the unit’s

power circuitry and has four state:

LED OFF Display OFF Unit is in OFF state

Display ON Unit is in ON state

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