B&K ST1430 Series II Manual de usuario

B & K Components Ltd.

P/N 12690

B&K Components, Ltd., 2100 Old Union Road, Buffalo, New York 14227

Page 1

Safety Precautions Page 2

Purpose and function Page 3

Design and construction Page 3

Features Page 3

Rear panel view Page 4

Rear panel description Page 4 - 5

Control muting Page 5 - 6

Level controls Page 6

Outputs Page 7

Inputs Page 7 - 8

System installation Page 8

Making the connection Page 9

Troubleshooting Page 10

Care and cleaning Page 10

Specifications Page 11

Warranty page 12

Manual and Power cord

Page 2

WARNING: TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS UNIT

TO RAIN OR MOISTURE.

The lightning flash with arrowhead, within an equilateral triangle, is intended to alert the

user of the presence of uninsulated “dangerous voltage” within the product’s enclosure

that may be sufficient magnitude to constitute a risk of electric shock to you.

The exclamation point within an equilateral triangle is intended to alert the user of the

presence of important operating and maintenance (servicing) instructions in the

literature accompanying the unit.

Observance of polarity is essential. Double-check connections before turning

the amplifier on. The amplifier can be damaged if polarities are incorrect.

Damage can occur to your speakers if the power rating* of each individual driver

is exceeded by the amplifier. Ensure that all the drivers in your speaker system

are capable of handling not only the power being delivered by the amplifier, but

the energy that is likely to be generated during strong passages.

Turn amplifier ‘off’ when plugging in or unplugging input and speaker cables!!!

The ST1430 series II is equipped with raised feet so that continuous ventilation

can be maintained. They help to maintain acoustic feedback into the amplifier at

a minimum. They also provide a measure of protection against scratching any

surface the unit might be resting on.

Do not stack anything on top of the amplifier (preamplifier, processor,

source...etc.).

Leave at least 2-3 inches clearance from the top of the amplifier to the next shelf,

component, etc., to ensure proper ventilation.

* If you are at all unsure of what the speaker ‘ratings’ are, contact your dealer.

Page 3

The ST1430 series II is a compact, very efficient, three channel power amplifier. It is

designed to be used in all types of audio or audio/video systems.

The ST1430 series II utilizes high quality electronic circuitry to achieve an environment

wherein a detailed, transparent, and highly musical sound can be realized. The high

quality parts complement include state-of-the-art solid state devices, 1% metal film

resistors, computer grade electrolytic power supply capacitors, and a high capacity

toroidal transformer.

The ST1430 series II operates class A predriver and AB high current MOSFET power

output stages. It is capable of reproducing the most demanding audio signals at rated

power levels.

- Efficient high current transformer for improved dynamics.

- More accurate and three dimensional reproduction of source

material.

- Improves low level detail for smoother, more musical sound.

- For efficient and linear power delivery.

- Provides short term protection from accidental shorting of output

devices and protection from thermal overload.

- Improve connections for better sound and minimized signal

loss and degradation.

- Low noise resistors for better sound and a greater degree

of repeatability.

- Ability to reproduce demanding recordings.

- Large capacity computer grade electrolytic capacitors

for extended low frequency control and improved dynamics.

Page 4

1. AC fuse holder 4. Inputs

2. AC Input receptacle 5. Level controls

3. Speaker outputs 6. Amplifier control muting input/output

1. AC fuse holder - Holds the AC Line fuse. This fuse is an 8 Amp / 250 Volt

Slow Blow fuse. Replace with same type and value fuse

only.

2. AC Input receptacle - For attaching the supplied AC power cord to the

amplifier.

3. Speaker outputs - For connecting the speakers to the amplifier. Explained

further on page 7.

4. Inputs - For connecting signal patch cables (interconnects) from the

preamplifier to the amplifier to pass signal. Explained further

on page 7.

Page 5

5. Level controls - For adjusting the input level of each channel into the

amplifier. There are level controls on the back of the

amplifier. One level control for each channel. Explained

further on page 6.

6. Amplifier control muting input/output -

To provide remote switching of mute on/off of the amplifier.

Explained further below.

A control is provided on each ST1430 series II amplifier to allow remote switching of

mute on/off. The preamplifier’s control output, such as is provided with B&K series

preamplifiers, can be utilized to provide a control signal to the ST1430 seriesII. If more

than one amplifier is being controlled, the control signal can be extended to include

each successive unit by simply running an RCA type audio cable from the CTRL OUT

connector of the first amplifier to the CTRL IN connector of the next unit (commonly

referred to as ‘daisy chaining’). An example of how to connect two amplifiers is

illustrated in figure B.

If a source other than a B&K series preamplifier is used to control multiple amplifiers,

only the control output voltage from the source is critical. It must be within the range, as

indicated on the rear panel, 5-24 volts DC is required. The amplifier will provide each

successive amplifier with a control voltage of 12 volts DC for reliable operation. The

amplifiers control output may be used as a source of 12 VDC @ 125 mA for other user

applications as well.

Page 6

If the control function is desired, each unit in the system must remain connected at all

times and the control must be enabled. To enable the control function, the CTRL

ENABLE button must be out for each controllable amplifier in the system. For more

information on the amplifiers output status under various control conditions, refer to the

table below.

@ CTRL IN Button position Output status @ CTRL OUT

Signal OUT Sound Signal

Signal IN Sound Signal

No Signal OUT Mute No Signal

No Signal IN Sound Signal

The level controls are an option that can be added to the amplifier. If your amplifier has

this option, the balanced inputs are not present.

There are three level controls on the back of the amplifier. One level control for each

channel.

When using the level controls, first start with them turned all the way up (clockwise).

Then adjust them according to your system requirements to match the sound level

coming from each speaker.

Page 7

Five way binding posts are provided. One pair for each channel. They are designed to

accept a banana-type plug or spade lug connector (shown below) and are color coded

for easy identification. The red (+) post should always be connected to the speakers (+)

jack. The black (-) post should always be connected to the speakers (-) jack.

Spade connector Banana jack

Here is a typical amplifier setup:

Unbalanced - RCA type connectors accept line input from the preamplifier’s

unbalanced output connectors. There are three input connectors, one

for each channel, that may be used to connect the amplifier to the

preamplifier.

RCA cable connector -

Page 8

Here is a typical input setup:

There will most likely be a number of cables involved in the installation of your home

entertainment system. Pre-planning is essential in order to maximize system efficiency.

We recommend the following as a means of helping you reach that goal:

Make a diagram of your proposed system by laying out the relative location of

each component in the system. Then lay out the proposed cable runs between

them. Number each cable and record its length on the diagram for future

reference.

Cable runs are critical in that they must be kept away from sources of power

radiation (amplifiers, power cords, heaters, etc...). For the sake of safety, they

should also be kept out of traffic areas.

The process of optimizing the system will include the type of cable, the length of

the run, and the obstructions it must deal with along its run. Your dealer can

advise you on the products available and their relative merits. If building custom

length audio cables is not your strength, your dealer should be able to help you

with that as well.

When possible, use a separate AC power line for the amplifier, one that is not

shared by any other component in the system of any other house hold

component.

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