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 p
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.
REX II Vacuum Tube Balanced Stereo Preamplifier Owner's Manual 1300 First Stat Blvd.
TABLE OF CONTENT CURRENT SOURCES CHANGING CURRENT SOURCES AC SHUNT VOLTAGE REGULATORS INTRODUCTION Package Content Physical Placement Configuring the REX II Connecting to your system 4 FRONT PANEL CONTROLS REX II Power On sequence Turning the REX II Off PHASE Button and LED MONO button and LED MUTE button and LED INPUT selection VOLUME knob DISPLAY format FUCTION button DISPLAY Brightness function MUTE function 10 REX II PROGRAMMABLE FUNCTIONS Parameter Definitions 14 15 PROGRAMMING THE REX II BALANCE
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. 2. 3.
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.
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.
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.
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.
Pin 1: Pin 2: Pin 3: common/shield positive 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.
LED Flashing LED ON Unit is going through its Power-ON routine Unit is in its STANDBY mode When the unit is plugged into a power line, it will stay in the OFF state until the Standby button is pushed. The LED will then start blinking and the unit will go through a 50second warm-up sequence. At the end of that sequence it will turn ON. Pressing the button again will switch the unit into its Standby mode. The REX II can be turned OFF by pressing and holding the Standby button.
LED ON Inverting operation MONO Button and LED The Mono button allows the user to switch the REX II in Mono operation when the two channels are summed together. This may be useful, for example, while listening to old monophonic recordings. This function is also accessible via the VK-R3 remote control. LED OFF Stereo operation LED ON Mono operation MUTE Button and LED The Mute button disables the preamplifier output.
2. Four-character input name. That name is fully programmable (See the programming functions) and can include up to four character from the Latin, Cyrillic or Greek alphabets or digits. 3. Balance adjustment indicator. Characters L or R indicate that the balance is shifted in the corresponding direction. A BLANK character means that the gains of both channels are identical. 4.
will dim but never turn completely OFF. With the display OFF, issuing any remote control command that would normally require a display change (i.e.: Volume, Input selection, Fade) will automatically turn the display back ON. MUTE Function: The REX II has two mute modes: manual and automatic. The blue LED above the Mute button goes ON when the unit is in MUTE state. To MUTE the REX II, depress the MUTE button located on the right side of the front panel.
and Volume knob, or corresponding remote control buttons (Function and Volume Up/Down buttons). Every unit comes from the factory with a default set of parameters stored in its memory. This set of parameters is usable for many applications.
1. Input name (Examples include CD1, DVD1, PH-1, VKD5, or any other combination of up to four characters including the Latin, Cyrillic and Greek alphabet as well as digits) 2. Balance adjustment – gain shifted Left or Right. 3. Volume offset relative to any other input (to compensate for gross differences in various sources levels) 4. Phase: Inverting, Non-inverting or Last configuration 5. Stereo, Mono or Last configuration 6. Maximum allowable volume setting for a particular input.
It is quite common to have sources with very different output levels connected to a preamplifier. In this case, switching between different inputs is usually accomplished by a large change in volume. The REX II allows the user to avoid this inconvenience by setting volume offsets between different inputs (using ANY input as a reference). To program this feature: 1. Select any input that you would like to use as a reference. Play music at the level you find comfortable. 2. Press the Function button twice.
PHASE programming. Select the desired input. Press the Function button three times. The display will read: PHASE NINV. Use the volume knob to set the condition to NINV, INV or LAST. Exit the programming mode by pressing and holding the Function button . NOTE: In the LAST mode, the state of the PHASE switch will be the same as used the last time for that particular input. MONO/STEREO programming. Select the desired input. Press the Function button four times.
FIXED Gain mode In some systems (some A/V installations, for example) it is desirable to set a particular input to a fixed gain, that is then becomes unaffected by the volume knob. Most often it is required to set the preamplifier gain to Unity (Gain of 1). The REX II allows the user to do so by using its FIXED gain function. Press the Function button six times. The display will read: FIX OFF Enter any desired number for the fixed gain on the selected input (see below).
INPUT NAME programming: The REX II allows the user to assign any a custom name to any input. Those names may include up to four characters. The default names for the inputs are as follows: 1 2 3 4 5 TAPE TUN CD! AUX1 AUX2 (It will automatically switch to PH1 if the optional phono card is installed) Any combination of up to four Latin, Cyrillic, Greek alphabet characters or digits can be used to name the source. The examples may include: CD-2, DVD1, JOHN, VKD5, MARY, BOB1, etc.
REMOTE CONTROL FUNCTIONS: The optional VK-R3 remote control that comes with your REX II has the following functions: Volume Up and Volume Down control Mute function Fade Down/Fade Up function Input Source Selection 1 through 5 Phase switch Function switch Display/POWER switch. The following describes these functions. Volume Up and Down These two buttons are programmed with variable speed volume change profiles. The rate of volume change will be slow upon initial pressing of the Volume Up or Down buttons.
When the FADE button is pressed, the volume will go down all the way to zero (000 on display, unit in Mute). Pressing the Fade button again will cause the volume to ramp back up to its initial value. INPUT SELECT: Pressing any input selection button on the VK-R3 remote control will switch the REX II to that input. All of the set parameters associated with that input will be loaded at this point. DISPLAY/POWER switch.
Factory supplied fuses should be only replaced with the same type and rating parts. Servicing The Balanced Audio Technology REX II should require no service in normal operation. Please direct any further service inquiries to the factory. Cleaning To remove dust, occasionally wipe the front and top surfaces of your REX II with a damp soft cloth. If fingerprints appear, you may use a mild, non-alkaline soap solution. Do not use abrasive cleaners, as they may damage the fine finish of the unit.
RESETTING THE REX II: Under certain conditions it might become desirable to reset the internal microprocessor that controls all the functions of the REX II. Doing so will erase ALL user programmed setpoints, and will return the unit to its factory default state. In order to RESET the REX II, do the following: 1. Turn the unit OFF. 2. Disconnect the power cord from the back of the Control Module. 3. Wait about two minutes. 4. Press AND HOLD front panel buttons Input 3 and Input 5. 5.
Terms and Conditions Five Year Limited Warranty 1. Limited Warranty Upon receipt of the attached warranty registration form, Balanced Audio Technology warrants the purchased product to be free from manufacturing, materials, and workmanship defects for five years from date of original purchase, excepting vacuum tubes, subject to the following conditions.
