Balanced Audio Technology VK-60SE Manual de usuario

VK-60SE

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-60SE

Special Edition

Balanced Power Amplifier

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-60SE power

amplifier. Please read this owner’s manual to obtain the full benefit of the VK-60SE in

your system. This manual provides you with necessary safety information and operating

procedures for this exceptional unit. For more technical information on the circuit

design, please read the Balanced Audio Technology VK-60 White paper.

WARNINGS:

To prevent the possibility of serious injury, electrical shock, or fire:

DO NOT operate with the bottom cover removed.

DO NOT expose to rain or moisture.

DO NOT defeat the ground power-plug.

DO NOT replace fuses 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-60SE Power Amplifier 1

6C33C-B Output Tubes 4

6SN7 Signal Tubes 6

6H30 Super Tubes 2

6V6 Power Tubes 2

Power Cord 1

Torx Wrench (T-10) 1

Spare Cover Screws 5

Spare Fuses 5

Owner’s Manual 1

Optional Accessories (as ordered)

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

return the VK-60SE to the factory for service.

Installing Tubes

1. Install the six 6SN7 tubes in the positions V1 through V6

2. Install the four 6C33C-B output tubes into positions V9 through V12

3. Install the two 6H30 SuperTubes into posiitons V7 and V8

4. Install the two 6V6 tubes into positions V13 and V14

Physical Placement

It is recommended that you provide open space above the unit for proper ventilation, with

no electronic components placed directly overhead.

Mount the unit on a hard surface with proper ventilation underneath. Avoid placing the

unit directly on a carpeted floor.

Connecting the VK-60SE to Your System

For Balanced Preamplifiers:

Use balanced XLR interconnects. The left and right channel input connectors are clearly

marked on the back panel of the VK-60SE.

Note: The VK-60SE XLR inputs are wired as follows:

Pin 1: common/shield

Pin 2: positive

Pin 3: negative

For Single-Ended Preamplifiers:

Single-ended preamplifiers have RCA connectors. The VK-60SE power amplifier is

designed to work with either balanced or single-ended preamplifiers connected to its inputs.

All that is required to connect a single-ended preamplifier with RCA connectors to the

VK-60SE’s inputs is the optional balanced to single-ended adapters. These adapters are

available from Balanced Audio Technology at a nominal charge.

For Speaker Connections:

The speaker connectors are clearly marked on the back panel of the VK-60SE. There are

several sets of output taps marked LOW, MEDIUM and HIGH for connecting a variety of

speakers to the VK-60SE. Please note that some experimentation may be required. Try

each output tap until you find the one that gives the most balanced performance in your

system.

Operating the VK-60SE

Normal operation of the VK-60SE requires simply turning the unit on. There are no

meters to connect, bias setpoints to remember, or drifting bias points to adjust. Please

read the Autobias Feature section for more details.

Turning the VK-60SE On:

The power switch is located at the rear of the unit. When you turn the unit on, it will go

through a gentle power-on sequence. After about one minute, four LED’s visible from

the top of the chassis should light up. This indicates that full operating bias has been

reached and the unit is now ready to play.

Turning the VK-60SE Off:

The unit can be turned Off at any time (even while playing). If needed, please wait at

least 30 seconds before turning the unit ON again.

Autobias Feature:

The VK-60SE implements a sophisticated autobias circuit that automatically compensates

for tube aging and line voltage fluctuations, as well as marginal mismatching of tubes.

The successful operation of the autobias circuit is noted by individual LED’s that glow

visibly next to each output tube when viewed from the top of the chassis. A total of four

LED’s should light up to indicate proper operation of the circuit. If one of the LED’s

fails to light up (after the unit is warm),

there could be two reasons for this problem:

1. The particular output tube is defective. In this case replacing this tube with a

known good one should turn the LED ON.

2. The amplifier was overstressed and the protective fuse inside opened. These

fuses protect output tubes from overloading. There are four fuses mounted on the

two PC boards. Please refer to the section on replacing fuses for correct

procedure.

Replacing Fuses:

WARNING: Please turn the unit OFF and disconnect the power cord before

proceeding.

There are five fuses in the VK-60SE. The main Slow-Blow fuse (10A rating for 110-

120VAC line voltage and 5A for the 200-240VAC range) is located on the unit’s back

panel. The four 3A Fast-Acting protection fuses are mounted on the VK-60SE printed

circuit boards and can be acsessed through the holes in the amplifier bottom plate. If the

pilot LED on the front panel goes out, try replacing the main fuse on the back panel with

the same type fuse.

If one or more of the autobias LED’s has gone out, turn the unit off and wait for few

minutes before proceeding, allowing the internal electrical charge to dissipate. Place the

VK-60SE on its side and hold securelly. Through the acsess holes in the bottom plate,

remove and replace the blown fuse with the 3A Fast-Acting type.

In either case, if the unit still fails to operate properly, please contact the factory for

professional service.

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

Replacing Output Tubes:

In order to replace the 6C33C-B output tubes, please contact the factory and supply them

with the unique identification number stamped on the side of the tube needing

replacement. This information will be used by Balanced Audio Technology to provide an

optimal replacement tube for your amplifier.

Please do not substitute any random tube as a replacement. Although the automatic

bias circuit in the VK-60SE will accept virtually any random set of output tubes, the unit

will not be guaranteed to meet all of its performance specifications under such conditions.

Finally, the determination that a single tube replacement is prudent rests solely with the

customer, based on actual hours of use for the particular set of tubes. The factory

assumes no responsibility for possible performance decrease under such conditions.

Servicing:

The Balanced Audio Technology VK-60SE should require no service other than tube

replacement to maintain its high performance. Please direct any further service inquiries

to the factory.

Cleaning:

To remove dust, occasionally wipe the front and top surfaces of your VK-60SE 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.

VK-60SE 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

warranty registration form together with a copy of your sales receipt within 30 days from original

purchase will result in a warranty period of one year from the date of manufacture.

2. Vacuum Tubes

The 6SN7, 6H30 and 6V6 vacuum tubes (including replacements under warranty) are warrantied for one year

from the date of the original VK-60SE purchase. The output 6C33C-B vacuum tubes are warrantied for ninety

days.

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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