1 vk-31 warranty registration form unit serial number: _______________________________________ customer name: _______________________________________ address: _______________________________________ _______________________________________ date of purchase: _______________________________________ pur...
2 vk-31 vacuum tube balanced stereo preamplifier owner's manual 1300 first state blvd. Suite a w ilmington, de 19804 tel: 302-999-8855 fax: 302-999-8818.
3 table of content introduction 4 package content 4 physical placement 5 connecting to your system 5 front panel controls 6 vk-31 power on sequence 6 turning the vk-31 off 6 phase button and led 7 mono button and led 7 mute button and led 7 input selection 7 volume knob 7 display format 8 fuction bu...
4 introduction thank you for your purchase of the balanced audio technology vk-31 preamplifier. Please read this owner's manual to obtain the full benefit of the vk-31 in your system. It will provide you with the needed safety information and operating procedures for this exceptional unit. Warnings:...
5 physical placement it is recommended that you provide at least 6" of free space around the unit for proper ventilation. Mount the unit on a hard surface with proper ventilation underneath. Do not stack the vk-31 preamplifier on top of other units, nor vice versa. Connecting the vk-31 to your syste...
6 vk-31 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 ...
7 phase button and led this button allows the user to invert the absolute polarity of the signal to compensate for some recordings that are made out-of-phase. The led indicates whether the unit is in its inverting or noninverting mode. This function is also accessible via the vk-r3 remote control. L...
8 display format: the vk-31 vacuum fluorescent display (vfd) is capable of showing up to twelve alphanumeric characters. Its format depends on the mode of operation. In the normal play mode the display has the following format: 1. One character indicating the selected input number. 2. Four-character...
9 display on-off function changing the display brightness: the vk-31se display can be dimmed or turned completely off by simply pressing the display button on your vk-r3 remote control transmitter. Each press will reduce the brightness of display and led indicators in steps from full on to off, and ...
10 vk-31 programable functions the vk-31 programming functions allow the user to optimize the unit configuration for any particular system set up. The flexible programming facility defines each signal input with a group of user-selectable parameters that are then stored in the unit’s memory. Every t...
11 parameter definitions: every input of the vk-31 is defined with the following set of parameters. 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 – gai...
12 relative volume adjustment. 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 vk-31 allows the user to avoid this inconvenience by setting volu...
13 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 pha...
14 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 vk-31 allows the user to do so by u...
15 input name programming: the vk-31 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 installed...
16 remote control functions: the optional vk-r3 remote control that comes with your vk-31 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 descri...
17 input select: pressing any input selection button on the vk-r3 remote control will switch the vk-31 to that input. All of the set parameters associated with that input will be loaded at this point. Display/power switch. The display/power button on the vk-r3 remote control provides two functions: ...
18 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...
