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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 warranted for one year from
the date of manufacture.
1300 First Stat Blvd. Suite A W ilmington DE 19804 Tel: 302-999-8855 www.balanced.com
VK-80
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Summary of Contents for Balanced Audio Technology VK-80
- Page 1 VK-80 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.
- Page 2 VK-80 Vacuum Tube Balanced Stereo Preamplifier Owner's Manual 1300 First Stat Blvd. Suite A W ilmington DE 19804 Tel: 302 -999-8855 www.balanced.com...
- Page 3 Vacuum Tube Current Sources in VK-80 Your VK-80 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 VK-80, being part of the signal gain stage, have a direct effect on the unit’s sound.
- Page 4 In order to change the tube type the user needs to remove the installed Current Source board, and replace it with either another board, 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.
- Page 5 CURRENT SOURCES CHANGING CURRENT SOURCES INTRODUCTION Package Content Physical Placement Connecting to your system FRONT PANEL CONTROLS VK-80 Power On sequence Turning the VK-80 Off PHASE Button and LED MONO button and LED MUTE button and LED INPUT selection VOLUME knob...
- Page 6 Thank you for your purchase of the Balanced Audio Technology VK-80 preamplifier. Please read this owner's manual to obtain the full benefit of the VK-80 in your system. It will provide you with the needed safety information and operating procedures for this exceptional unit.
- Page 7 Pin 3: negative For the VK-80, 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 VK-80 preamplifier is designed to work with mix of single-ended and balanced components connected to its inputs and outputs.
- Page 8 2. Normally the VK-80 will be not muted (Mute LED on the display is OFF) and will begin playing at the end of the 50 second delay. If so desired, the unit can be put in the MUTE mode during this delay interval either by depressing the front panel MUTE switch or by using the MUTE button on the VK-R5 remote control transmitter.
- Page 9 BALANCE adjustment when the VK-80 is switched into its Balance mode. More on that in the corresponding sections of this manual. The volume control knob on the VK-80 is linked to a digital encoder and is of a continuously rotating type (there are no stops).
- Page 10 DISPLAY FORMAT: The VK-80 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.
- Page 11 The VK-80 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 VK-80, depress the MUTE button located on the right side of the front panel. Depressing this button again will return the unit to its normal operation and turn the mute LED off.
- Page 12 VK-80 PROGRAMABLE FUNCTIONS The VK-80 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 time a particular input is selected, its unique combination of parameters is loaded into the operating memory.
- Page 13 Parameter Definitions: Every input of the VK-80 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.
- Page 14 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-80 allows the user to avoid this inconvenience by setting volume offsets between different inputs (using ANY input as a reference).
- Page 15 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.
- Page 16 Most often it is required to set the preamplifier gain to Unity (Gain of 1). The VK-80 allows the user to do so by using its FIXED gain function.
- Page 17 INPUT NAME programming: The VK-80 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: TAPE 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.
- Page 18 Mute Pressing this button will cause the MUTE function in the VK-80 to toggle between ON and OFF states. The Mute LED on the VK-80 front panel will reflect the status of the Mute circuit.
- Page 19 VK-R5 remote control transmitter. Fuse Protection: A blown fuse in the VK-80 is an indication of a serious problem. If a replacement fuse fails as well, no further attempts should be undertaken. Please contact the factory for professional service. The proper fuse ratings are as follows:...
- Page 20 Doing so will erase ALL user programmed setpoints, and will return the unit to its factory default state. In order to RESET the VK-80, do the following: 1. Turn the unit OFF. 2. Disconnect the power cord from the back of the unit.
- Page 21 Specifications 2 XLR’s + 3 RCA’s Inputs: Outputs: Main: 1 XLR + 1 RCA Tape Out 1 RCA Maximum Gain: 20dB Global Feedback: None Volume Control Resolution: .5dB Volume Control Number of Steps: Frequency Response: 2 Hz to 200 kHz Input Impedance (minimum:) 100kOhm each phase Output Impedance...
- Page 22 (available from the factory via phone or fax). Upon receipt of defective product, Balanced Audio Technology agrees to repair the product without charge for parts (except vacuum tubes if the unit is more than one year old), or labor. The product will then be returned via prepaid, insured freight, with carrier at the sole determination of Balanced Audio Technology.
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