Bryston ST Series User manual

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1

Table of contents

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BRYSTON

OWNER’S

MANUAL

Instructions

For

Bryston

ST

Sales

Amplifiers

Model

9B

ST

GENERAL

INSTRUCTIONS

Warranty

Information:

Thank

you

for

choosing

a

Bryston

product.

We

welcome

any

suggestions

you

may

have,

or

comments

regarding

the

operation

of

your

am¬

plifier.

We

consider

you,

our

customer,

to

be

Bryston’s

most

important

resource,

and

your

opinion

is

very

much

appreciated.

Bryston

products

are

warranted

to

be

free

from

manufacturing

defects

for

a

minimum

of

20,

(twenty),

years

from

the

original

date

of

manu¬

facture.

This

includes

all

parts,

labor

and

one¬

way

return

shipping.

This

warranty

covers

the

original

owner

and

any

subsequent

owners.

The

warranty

is

retroactive

for

any

Bryston

product

purchased

within

the

last

twenty

years.

Tamper¬

Bryston

9B-ST

Amplifier

[Description:

The

Bryston

9B-ST

is

a

multi-channel

power

amplifier

consisting

of

five

independent

ampli¬

fier

modules,

each

with

its

own

power

trans¬

former

and

+/-60V

power

supply.

Each

audio

channel

provides

connections

for

balanced

or

ing

by

anyone

other

than

factory

authorized

personnel

voids

the

warranty.

Warranty

service

may

be

obtained

by

returning

the

unit

to

any

authorized

Bryston

dealer

or

distributor.

You

may

also

contact

the

Bryston

factory

or

national

service

offices

directly

at

the

location

listed

on

the

rear

page

of

this

manual.

Please

keep

the

original

box

and

all

packing

material.

This

will

ensure

the

amplifier

is

pro¬

tected

in

the

unlikely

event

you

have

a

problem

and

must

return

it

for

service.

No

warranty

card

is

necessary

to

initiate

your

coverage.

Please

refer

to

the

back

page

for

more

detailed

war¬

ranty

information.

single

ended

input

and

will

supply

a

minimum

of

120

watts

of

power

into

8

ohms

or

200

watts

into

4

ohms.

A

remote

power

control

option

is

available

on

THX

versions.

Installation

Setup

And

Recommendations:

PROVIDE

ADEQUATE

VENTILATION

Do

not

place

the

amplifier

in

an

enclosed

un¬

ventilated

area.

Allow

at

a

minimum,

3

inches

of

space

at

the

top,

sides

and

back

as

your

ampli¬

fier

relies

on

convection

cooling

and

ample

air

flow

is

required.

Be

sure

cool

air

can

flow

freely

through

the

amplifier.

Do

not

install

near

heat

sources

such

as

other

power

amplifiers,

hot

air

vents,

radiators,

etc.

All

Bryston

amplifiers

contain

high

quality,

dedi¬

cated

circuitry

in

their

power

supplies

to

reject

RF,

line

spikes

and

other

power-line

problems.

Bryston

power

amplifiers

do

not

require

any

specialized

power

line

conditioners.

Simply

plug

the

amplifier

directly

into

its

own

wall

socket.

Make

sure

the

power

switch

on

the

front

of

the

amplifier

is

in

the

off

(out)

position.

Plug

the

power

cord

(female

end)

into

the

rear

of

the

amplifier,

then

insert

the

male

end

into

the

wall

outlet.

Finally,

upon

completion

of

the

installation

activate

the

9B

power

switch

only

after

all

other

equipment

is

pow¬

ered

up.

Note:

If

rack-mounting

the

19

inch

version

please

ensure

that

the

rear

of

the

9B

is

well

supported.

PLEASE

REFER

TO:

“BRYSTON’S

SAFETY

MANUAL”

FOR

FURTHER

OPERATING

INSTRUCTIONS.

Page

2

BRYSTON

9B

ST

MANUAL

9B

ST

Rear

Panel

Input:

The

9B

has

two

inputs,

one

for

a

balanced

source,and

one

for

single

ended

or

un-balanced

source.

The

BAL

input

connec¬

tor

will

accept

either

a

3

pin

‘XLR’

type

or

a

1/4”

Tip/Ring/

Sleeve

type.

The

in

phase

(+)

terminal

is

pin

2

on

the

‘XLR’

and

tip

on

the

TRS.

The

input

impedance

is

15K

ohms.

The

input

pins

are

gold

plated.

Input

sensitivity

is

selectable

using

the

‘INPUT’

slide

switch.

In

the

‘BAL

REG’

position

2

Volts

in

=

100

Watts

/

8

ohms

output.

This

is

the

recommended

setting

when

using

Bryston

pre-amplifiers

or

Balanced

Vs

Unbalanced:

Balanced

cable

interconnects

should

be

used

whenever

possible,

as

they

provide

common

mode

noise

protection

from

external

electrical

interference,

and

with

active

balanced

outputs

a

6

dB

higher

signal

level

flows

in

the

cable.

The

unbalanced

cable

interconnect

is

provided

for

pre-amplifiers

without

balanced

output.

Un¬

balanced

cables

should

be

kept

to

10

feet

or

less.

In

general

never

use

longer

cables

than

necessary,

never

coil

excess

cable

length,

and

run

signal

wires

away

from

and

never

parallel

to

AC

power

or

speaker

cables.

Output:

Gold

plated

output

binding

posts

provide

three

different

interconnect

options.

Stripped

bare

wire

up

to

8

Ga.

can

be

passed

through

the

hole

in

the

binding

post

and

held

in

place

by

tightening

the

post

knob.

Additional

tightening

pressure

can

be

achieved

using

a

coin

in

the

slots

of

the

knob.

Copper

wire

is

malleable

and

may

require

further

tightening

a

month

or

any

pre-amplifier

having

active

balanced

outputs.

This

setting

also

produces

the

lowest

ampli¬

fier

noise

floor.

The

‘BAL

+6

dB”

setting

adds

6

db

of

gain

to

provide

an

input

sensitivity

of

1

Volt

in

=

100

Watts

/

8

ohms

output.

This

set¬

ting

is

primarily

for

balanced

out¬

puts

that

are

transformer

cou¬

pled,

or

other

low

level

sources.

The

‘UNBAL’

setting

selects

the

gold

plated

‘RCA’

type

tip/sleeve

connector.

The

input

impedance

is

50K

ohms.

The

output

is

in

phase

with

the

input

and

the

sensitivity

is

1

Volt

in

=

100

Watts

into

8

ohms

output.

two

after

initial

installation.

When

using

bare

wire

watch

out

for

fine

wire

fragments

shorting

from

one

wire

to

the

other.

Wire

terminated

with

banana

plugs,spade

lugs,

or

pins

are

also

accommodated

by

the

binding

posts.

We

recommend

gold

plated

connectors

to

prevent

corrosion

and

signal

distortion.

The

red

(+)

binding

post

is

the

output

and

normally

will

be

connected

to

the

red

(+)

con¬

nector

on

the

loudspeaker.

The

black

(-)

bind¬

ing

post

is

ground

and

should

be

connected

to

the

black

(-)

connector

on

the

loudspeaker.

Speaker

wire

should

be

kept

as

short

as

practi¬

cal

and

should

never

be

terminated

with

con¬

nectors

that

may

become

confused

with

AC

power

connectors.

Speaker

cables

should

be

dressed

away

from

input

and

power

cables,

and

even

each

other

when

runs

are

long.

The

minimum

speaker

ioad

on

the

amplifier

is

4

ohms.

Page

3

BRYSTON

9B

ST

MANUAL

Clipping

indicators:

All

Bryston

amplifiers

use

bicolor

LEDs

with

green

indicating

power

on

and

flashing

red

indi¬

cating

actual

overload

or

distortion.

Upon

power-

up

the

9B’s

LED’s

will

remain

“red”

until

all

volt¬

ages

stabilize

and

the

unit

comes

out

of

mute

and

the

LED

turns

green.

If

the

LED

indicator

contains

a

substantial

red

content,

when

program

is

present,

it

should

be

considered

as

a

sign

that

the

level

is

too

high

and

may

cause

speaker

damage

if

it

continues.

It

should

be

remembered

that

the

Bryston

ST

se¬

ries

are

powerful

amplifiers,

and

that

it

is

possible

to

damage

almost

any

speaker

if

an

amplifier

is

used

in

a

thoughtless

or

abusive

manner.

Brys¬

ton

will

not

be

responsible

for

damage

caused

in

this

manner.

The

clip-sensing

circuit

uses

an

AC

comparator

to

detect

any

source

of

signal

distortion

including

clipping,

short

circuits

in

cabling,

excessive

DC

or

supersonic

signals,

whether

at

the

input

or

out¬

put.

Most

conditions

which

could

cause

the

red

LED

to

light

for

more

than

a

moment

or

two

can

be

dangerous

to

your

loudspeakers

and

should

be

corrected

immediately.

If

a

specific

LED

remains

“red”

without

signal

present,

it

may

indicate

a

thermai

overload

condition

and

the

channel

is

shut

down

until

safe

operating

temperatures

return.

Bryston

9B

ST

Remote

Power

Control

-

THX

units

only

r

REMOTE

POWER

CONTROL^

LOCAL

REMOTE

SELECT

’LOCAL’

WHEN

NOT

USING

REMOTE

POWER

CONTROL

DC

OR

AC

4-12V

FRONT

PANEL

POWER

SWITCH

MUST

BE

’ON’

WHEN

USING

REMOTE

POWER

FUNCTION.

n

©

I

i©

The

9B

ST

remote

power

control

function

allows

the

user

to

link

the

power

on/off

of

the

9B

to

an

exter¬

nal

preamplifier,

processor,

or

other

control

device.

This

is

useful

in

installations,

such

as

home

the¬

ater,

for

powering

up

multiple

am¬

plifiers,

often

at

distant

locations

from

the

source.

Located

on

the

back

panel

of

the

9B

ST

is

a

two

screw

terminal

input

connector.

The

amplifier

can

be

powered-up

by

applying

4-12

Volts

(AC

or

DC

of

either

polarity)

connected

to

the

termi¬

nals

of

the

jack.

This

jack

will

accept

1/4

inch

stripped

wire

ends,

inserted

into

the

square

holes

provided,

and

the

adjacent

screws

carefully

tightened

to

hold

them

in

place.

The

input

current

remains

at

less

than

3

ma

regardless

of

voltage,

there¬

fore

22

Ga

wire

is

sufficient.

^

The

front

panel

power

switch

must

be

left

in

the

"on"

position

(in),

at

all

times

for

the

am¬

plifier

to

operate

in

remote

power

control

mode.

^

In

‘REMOTE’

position

the

amplifier

can

only

be

turned

on

by

applying

a

remote

control

voltage

of

4-12

volts.

In

the

‘LOCAL’position

the

amplifier

will

not

respond

to

remote

control

voltage,

only

the

front

panel

power

switch.

^

At

all

times

the

power

can

be

turned

off

by

using

the

front

panel

power

switch.

Page

4

Typical

Surround

Sound

Hookup:

Shown

below:

is

a

typical

hookup

between

a

surround

sound

processor

and

the

9BST.

We

show

balanced

interconnects

which

we

rec¬

ommend

especially

when

the

9B

is

located

more

than

10

feet

from

the

processor.

The

connections

would

be

similar

using

the

unbal¬

anced

interconnects.

This

suggested

layout

when

viewed

from

the

front

of

the

9B

has

the

center

channel

in

the

middle

and

left

and

right

front

channels

adjacent

to

the

center

with

left

UNBALANCED

OUTPUTS

RIGHT

CENTER

LEFT

LSURR

SUB

@

(§)(§)

@

@

RSURR

REMOTE

12V

OUTPUT

RIGHT

BALANCED

OUTPUTS

CENTER

LER

LSURR

SUB

and

right

surround

speakers

juxtaposed

to

the

appropriate

left

and

right

front

channels.

This

particular

setup

allows

you

to

easily

monitor

the

status

of

each

individual

channel

as

the

power

LED’s

will

correlate

with

the

positions

of

the

speakers

in

most

rooms

(see

diagram

below).

It

should

be

noted

that

be¬

cause

each

channel

on

the

9B

is

identical

any

channel

can

be

operated

with

any

input

and

arranged

as

required.

For

Bryston

amplifiers

with

rear

panel

gain

adjustment

including

the

THX

designation

the

correct

THX

position

is

as

indicated

on

the

back

panel.

OH-QT

TW’lf

I

I

flA.

The

“BAL

THX”

or

the

“UNBAL

THX”

position

(see

diagram)

is

the

correct

setting

for

the

slide

switch.

Do

not

place

the

slide

selector

in

the

middle

or

+6

dB

position

if

installed

in

an

authorized

THX

system.

BAL

+

6dB

INPUT

sn

S

ERI

ES

Thx

UNBAL

THX

J

"WARNING!

RISK

OF

HAZARDOUS

ENERGY!

MAKE

PROPER

SPEAKER

CONNECTIONS.

SEE

OPERATING

MANUAL

BEFORE

USING.

120W80

9B

PRO

THX

The

9B

professional

version

provides

a

rotary

gain

control

which

must

be

turned

fully

clockwise

if

installed

in

a

THX

system

and

the

slide

switch

above

(see

diagram)

must

also

be

in

either

the

“BAL

THX”

or

“UNBAL

THX”

position.

^

□

]C]?SnCDQ]

ODpro

BAL

+

6

dB

UNBAL

THX

LEVEL

"WARNING!

RISK

OF

HAZARDOUS

ENERGY!

MAKE

PROPER

SPEAKER

CONNECTIONS.

SEE

OPERATING

MANUAL

BEFORE

USING.

-14

dB

THX

120W80

+

RO.

Box

2170,

677

Neal

Drive,

Peterborough,

Ont.,

Canada

K9J

7Y4

Tel:

(705)

742-5325

®

Fax:

(705)

742-0882

Bryston

products

are

warranted

to

be

free

from

manufacturing

defects

for

a

minimum

of

twenty

years

from

the

original

date

of

manufacture.

This

includes

parts,

labour

and

return

shipping

to

the

first

owner

and

all

subsequent

owners.

Warranty

coverage

is

automatic

and

commences

with

the

original

date

of

manufacture

which

is

kept

on

file

at

Bryston.

In

the

event

of

a

defect

or

malfunction,

Bryston

will

remedy

the

problem

by

repair

or

replacement,

as

we

deem

necessary,

to

restore

the

product

to

full

performance.

This

warranty

is

considered

void

if

the

defect,

malfunction

or

failure

of

the

product

or

any

component

part

was

caused

by

damage

(

not

resulting

from

a

defect

or

malfunction

)

or

abuse

while

in

the

possession

of

the

customer.

Tampering

by

persons

other

than

factory

authorized

service

personnel,

or

failure

to

fully

comply

with

Bryston

operating

instructions,

voids

the

warranty.

This

warranty

gives

you

specific

legal

rights

and

you

may

also

have

other

rights

which

may

vary

from

province

to

province

and

country

to

country.

FOR

BRYSTON

SERVICE

OUTSIDE

CANADA:

CONTACT

YOUR

LOCAL

DISTRIBUTOR

OR

CHECK

OUR

WEB

SITE

AT:

www.bryston.ca

OR

CALL

BRYSTON

DIRECTLY

AT:

PHONE:

705-742-5325

FAX:

705-742-0882

BRYSTON

SERVICE

CANADA:

24

STEINWAY

BLVD,.

UNIT

48

ETOBICOKE,

ONTARIO

CANADA

M9W

6T8

PHONE:

416-675-2585

FAX:

416-675-3103

BRYSTON

LTD.

P.O.

BOX

2170,677

NEAL

DRIVE

PETERBOROUGH,

ONTARIO

CANADA

K9J

7Y4

PHONE:

705-742-5325

FAX:

705-742-0882

BRYSTON

SERVICE

U.S.A.:

30

COVENTRY

ST.

NEWPORT

VERMONT.

U.S.A.

05855

PHONE:

802-334-1201

FAX:

802-334-6658

Specifications:

9B-120-R

channel

power

rating:

120

Watts

into

8

Q

200

Watts

Into

4

Q

input

impedance:

I

balanced

15kO

unbalanced

50

kQ

sensitivity:

bal

input

reg

2

Volt

in

=

100

Watts/8Q

bal

input

+6

1

Volt

In

=

100

Watts/8

Q

unbal

1

volt

in

=

100

Watts

/

8

Q

distortion:

Thd

+

N

.007%

20Hz

to

20kHz

at

120

Watts

/

8

0

IMD

.002%

60

Hz

+

7kHz

mixed

4

to

1

noise

-107db

20Hz

to

22kHz

bandpass

power

consumption:

all

channels

at

full

power

with

8

ohm

loads

=

900

VA.

all

channels

at

full

power

with

4

ohm

loads

=

1600VA.

all

channels

idle

=

100

VA.

9B-120-P

channel

The

9B-PRO

version

provides

for

input

attenua¬

tion

of

up

to

14dB

by

adjusting

the

‘LEVEL’

control.

Full

attenuation

versions

are

also

avail¬

able.

Level

controls

are

not

available

on

THX

versions.

THX

THX

MODELS

ARE

MANUFACTURED

UNDER

LICENSE

FROM

LUCASFILM

LTD.

THX

IS

A

TRADEMARK

OF

LUCASFILM

LTD.

dimensions

rack

mount

models

19”

x

17"

x

5.25”

17"

models

17”

x

17”

x

5.25"

shipping

weight

75

lbs