Balanced Audio Technology VK-5SE Bedienungsanleitung

VK-5SE

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 State Blvd. Suite A Wilmington, DE 19804

Tel: 302-999-8855 Fax: 302-999-8818

VK-5SE

Special Edition

Balanced Stereo Preamplifier

Owner's Manual

1300 First State Blvd. Suite A Wilmington, DE 19804

Tel: 302-999-8855 Fax: 302-999-8818

Introduction

Thank you for your purchase of the Balanced Audio Technology VK-5SE preamplifier.

Please read this owner's manual to obtain the full benefit of the VK-5SE in your system. It will

provide you with the needed safety information and operating procedures for this exceptional

unit. For more technical information on the circuit design, please read the Balanced Audio

Technology VK-5 white paper.

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 should be the following:

Description Quantity

VK-5SE Preamplifier 1

Power Cord 1

Spare Fuse 1

Torx Wrench (T-10) 1

Spare Top Cover Screws 5

User’s Manual 1

VK-R1 Remote Control 1

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

to return the VK-5SE to the factory for service.

Reseating Tubes

Normally, reseating tubes upon delivery is not required. However, if any tubes have

noticeably drifted out of position due to high transportation stress, it will be advisable to

reseat the tubes. Use the supplied Torx wrench to remove the top cover.

Reseat the tubes in their sockets and reinstall the top cover.

NOTE: When using the Torx wrench, make sure it is fully inserted so that the screw head is

not stripped.

Physical Placement

It is recommended that you provide for 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-5SE preamplifier on top of other units, nor vice versa.

Connecting the VK-5SE to Your System

Balanced Components

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

back panel.

Note: The VK-5SE XLR connectors are wired as follows:

Pin 1: common/shield

Pin 2: positive

Pin 3: negative

Use either the Main 1 or Main 2 Output for connection to your power amplifier. Both yield

equivalent results.

Single-Ended Components

Single-ended components have RCA connectors. The VK-5SE preamplifier is

designed to work with any mix of single-ended and balanced components connected to its

inputs and outputs. All that is required to connect a single-ended component with RCA

connectors to the VK-5SE’s inputs or outputs is the optional balanced to single-ended

adapters. 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.

Mixed Balanced and Single-Ended Systems

Any mix of single-ended and balanced components can be connected to the VK-5SE by

following the above instructions.

Operating the VK-5SE

Turning the VK-5SE On:

When you turn the VK-5SE On, it will automatically go through a gentle power-on sequence.

This sequence takes 50 seconds, during which time the display will be flashing, indicating the

status of the unit.

1. The number on the display during this time indicates the volume setting. This will be

equal to the last volume setting before the unit was turned OFF. This setting can be

changed during this time by using the volume knob or Volume Up/Volume Down buttons

on your remote control transmitter. All other remote control functions except the

MUTE are disabled during this time.

2. Normally the VK-5SE 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-R1 remote control transmitter.

Turning the VK-5SE Off:

The unit can be turned OFF at any time (even while playing) without first activating the Mute

switch. It will automatically mute.

Gain Controls:

Separate left and right gain controls replace the traditional balance control and provide up to

4 dB attenuation for each channel. Turning them counterclockwise will reduce the gain of

the corresponding channel. The preferred position is up fully clockwise (pointer at 12

o'clock).

DISPLAY FUNCTIONS:

Volume Display. The two-digit display in the middle of the VK-5SE front panel shows

the current volume setting. The range of values for the volume settings is from 00 to 99.

With the volume set to 00, the VK-5SE output will automatically MUTE.

For volume settings from 22 to 99, the display changes by one count corresponding to a

gain change of 0.5dB. Between the numbers 13 and 22 this scale corresponds to 1dB per

step. The step size for the settings from 01 to 13 is equal to 1.5dB.

The maximum signal gain of the VK-5SE (volume display at 99) is equal to 16dB.

Mute LED. This is located directly above the digital display and turns ON when the

VK-5SE is in its Mute state.

Command LED. This is located to the left of the digital display. This LED is activated

whenever the remote control command is being received by the VK-5SE.

DISPLAY ON-OFF Function

Turning the display OFF: The VK-5SE display can be turned OFF at any time by simply

pressing the STORE button on your VK-R1 remote control transmitter TWICE.

Turning the display ON: To turn the VK-5SE display back on, simply press ANY button

except the MUTE on the VK-R1 remote control. The command associated with this button

will be executed and the display will turn ON.

VOLUME KNOB:

The volume control knob on the VK-5SE is linked to a digital encoder and is of a

continuously rotating type (there are no stops).

MUTE FUNCTION:

The VK-5SE has two mute modes: manual and automatic. The red LED above the digital

volume display goes ON when the unit is in MUTE state. To MUTE the VK-5SE, depress

the MUTE switch located on the right side of the front panel. Depressing this switch again

will return the unit to its normal operation and turn the mute LED off.

When the unit is powered up it automatically self-mutes until the proper operating points of

the circuitry are reached. It will then automatically go into Play mode, provided the Mute

function was not activated (the red Mute LED is Off).

Turning the VK-5SE OFF even for short time, will make the unit reset its power sequencing

circuit and mute its output. It will then require 50 seconds for the unit to become operational

again.

REMOTE CONTROL FUNCTIONS:

The VK-R1 remote control that comes with your VK-5SE has the following functions:

1. Volume Up and Volume Down control

2. Mute function

3. Fade Down/Fade Up function

4. Storing and recalling of the preset volume positions

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.

Holding the button depressed will cause the rate of change to accelerate, allowing for more

flexible control when large changes in volume are required.

Mute

Pressing this button will cause the MUTE function in the VK-5SE to toggle between ON and

OFF states. The Mute LED on the VK-5SE display will reflect the status of the Mute circuit.

Fade

Pressing the FADE button on the VK-R1 remote control will cause the volume to smoothly

decay over the period of several seconds. This allows for a gradual reduction in volume, as

opposed to the instantaneous MUTE function. This can be particularly useful during the

presentation or demonstration of your equipment. When the FADE button is pressed, the

volume will go down all the way to zero (00 on display, unit in Mute).

Pressing the Fade button again will cause the volume to ramp up and return to its initial

value.

VOLUME PRESETS:

Volume presets. This function provides for an instant change to a predetermined volume

setting at any time. This may be convenient when switching between sources with different

output levels or for accurate and repeatable gain adjustments during testing of audio

equipment.

The VK-5SE can store up to five user-defined volume settings. In addition, the sixth position

is reserved for the UNITY GAINn setting, useful and popular in Audio/Video system

installations. The UNITY GAIN position is NOT user programmable.

In the UNITY GAIN position the VK-5SE gain is set to 0dB. The signal from the selected

source will propagate through the unit with its volume unchanged. This is commonly used in

Audio/Video installations, when the overall sound volume is adjusted using the surround

sound processor master volume control.

To store a volume setting:

1. Set the VK-5SE volume to the desired level

2. Press the STORE button. The display will begin to flash

3. Press any Volume Preset button from 1 through 5. The volume setting number

will now be stored in this location

This preset volume associated with any of the five programmable buttons can be changed at

any time by simply following the same sequence.

To recall the volume setting:

1. Press the desired volume preset button (1 through 5) on the VK-R1 remote control

transmitter. The display will start flashing indicating the volume setting associated

with this button. (This is done for safety reason - to avoid a sudden unpredictable

change of volume).

The display will continue flashing for 10 seconds, during which time the previous

volume setting stays unchanged. If no further command is received during this time,

the display will return to the previous setting.

2. Pressing the same preset button for the second time will lock the desired volume

into the system and the volume will now change to the new selected setting.

UNITY GAIN Setting:

Pressing the Unity Gain button on the remote control will cause the “U” symbol to be displayed.

The second press of this button will make the VK-5SE to go into its Unity Gain mode. This will be

indicated by the character “U” on the volume display.

WARNING: Please use this function carefully. as invoking this setting will apply a full scale

signal from the source selected at this time to your power amplifier. If external surround

sound processor is used, set its volume control to low level before switching the VK-5SE into

its UNITY GAIN position.

Overcurrent Protection:

Both channels in the VK-5SE are protected from certain overload conditions via electronic current-

sensing circuits. If an overcorrect condition is detected in either channel (for example, a short in

one of the regulator tubes), the unit will immediately be disabled, its high voltage supplies

disconnected and the output muted. The protection circuit may be reset by turning the unit Off for

a short period of time. However, if the fault condition remains, the unit will again be disabled and

therefore require professional service.

Fuse Protection:

A blown fuse in the VK-5SE 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:

For 100-120 VAC Units: 2A 250V Slow Blow

For 200-240 VAC Units: 1.5A 250V Slow Blow

Factory supplied fuses should be only replaced with the same type and rating parts.

Servicing

The Balanced Audio Technology VK-5SE should require no service other than changing tubes to

maintain its high performance. The vacuum tubes used in the VK-5SE are high-quality 6H30s and

5881s rated for approximately 5000 hours of use. Please direct any further service inquiries to the

factory.

Cleaning

To remove dust, occasionally wipe the front and top surfaces of your VK-5SE 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.

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, excepting vacuum tubes, subject to the following conditions. Failure to return the enclosed

registration form within 30 days from original purchase will result in a warranty period of one year from

the date of manufacture.

2. Vacuum Tubes

Vacuum tubes (including replacements under warranty) are warranted for one year from the date of the original

VK-5SE purchase.

3. Limited to Original Purchaser

This warranty is for the sole benefit of the original purchaser of the covered product, and may not be transferred

to a subsequent purchaser of the product.

4. Conditions and Limitations

This warranty is subject to certain conditions and limitations, as follows. This warranty is void and inapplicable

if the product has not been used in accordance with the instructions found elsewhere in this manual, or if it has

been misused or abused, damaged by accident or neglect, or in transport once in possession of the purchaser.

The warranty is also void if the product has been repaired, modified, or tampered with by anyone other than

Balanced Audio Technology or its specifically authorized agents.

5. Remedy

If this product contains a materials, manufacturing, or workmanship defect that cannot be repaired at the

dealership where the product was purchased, it must be packed in original packaging and returned to Balanced

Audio Technology via insured freight, at the owners expense. If replacement packaging materials are required,

they will be supplied by the factory at a nominal charge. Returned products must be accompanied by a

written description of the defect, and a return authorization number (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. This constitutes the purchasers sole remedy.

6. Design Changes

Balanced Audio Technology reserves the right to modify its products or change specifications at any time

without obligation or liability to previous purchasers.

7. Miscellaneous

Any implied warranties relating to the above product shall be limited to the duration of this warranty. This

warranty does not extend to any incidental or consequential costs or damages to the purchaser. This warranty

gives you specific legal rights. You may also have other rights which vary from state to state.

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