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  5. Owner's Manual

Balanced Audio Technology REX II Owner's Manual

Manual is about: Vacuum Tube Balanced Stereo Preamplifier

Summary of REX II

  • Page 1

    1 rex ii warranty registration form unit serial number: _______________________________________ customer name: _______________________________________ address: _______________________________________ _______________________________________ date of purchase: _______________________________________ pu...

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    2 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.

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    3 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.

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    4 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...

  • Page 5

    5 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 all...

  • Page 6: Warning:

    6 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...

  • Page 7

    7 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 t...

  • Page 8

    8 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...

  • Page 9

    9 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...

  • Page 10

    10 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 de...

  • Page 11

    11 led flashing unit is going through its power-on routine led on 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 th...

  • Page 12

    12 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 con...

  • Page 13

    13 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 di...

  • Page 14

    14 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 ...

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    15 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. The default set includes the following parameters: balan...

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    16 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 di...

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    17 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 differen...

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    18 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 ph...

  • Page 19

    19 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 ...

  • Page 20

    20 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 tape 2 tun 3 cd! 4 aux1 5 aux2 (it will automatically switch to ph1 if the optional phono card is installe...

  • Page 21

    21 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 descr...

  • Page 22

    22 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...

  • Page 23

    23 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 to...

  • Page 24

    24 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 t...

  • Page 25

    25 five year limited warranty terms and conditions 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, ex...