Bryston BP-20 Bedienungsanleitung

setup

Recommendations:

Congratulations

your

purchase

Bryston

preamplifier.

are

confident

will

provide

you

with

many

years

musical

enjoyment.

You

may

place

your

preamplifier

any

conive-

mient

location,

with

two

possible

exceptions.

you

own

the

Bryston

BP-25

remote-control

version,

position

the

preamplifier

maintain

direct

line-of-sight

between

the

hand-held

remote

and

the

remote

sensor

eye

located

the

left

side

the

preamplifier’s

front

panel.

you

purchased

the

BP-25P

BP-25MC,

which

includes

Phono

section,

avoid

placing

the

pream-

plifier

directly

top

your

power

amplifier..

Power

amplifiers

usually

employ

large

power

supplies

and

the

transformer(s)

the

power

supplies

can

cause

interfer-—

ence

(hum)

with

the

sensitive

phono

section

inside

the

preamp.

BP-PS

Power

Supply:

The

BP-PS

outboard

power

supply

provides

power

for

the

BP-20

and

BP-25

preamplifiers.

has

slide

power

switch

located

the

front

and

green

LED

indicate

power

on.

the

rear

the

unit

three-position

con-

nector

which

provides

control

voltage

for

remote

turn

on/off

your

Bryston

THX

amplifier(s)

other

ampli-

fiers

equipped.

This

feature

can

used

two

ways

depending

the

wiring

arrangement

utilized:

Option

one

provides

for

the

preamplifier

and

power

amplifier

turned

off

when

you

operate

the

power

switch

located

the

front

the

external

power

supply.

Turning

the

power

off

with

the

switch

the

outboard

power

supply

removes

power

Connections:

Connect

the

preamplifier’s

left

and

right

outputs

from

either

the

RCA

Balanced

XLR

connectors

the

appropriate

left

and

nght

input

jacks

your

power

amplifier.

Balanced

cables

are

advan

you

are

using

long

runs

cable,

(greater

than

feet),

between

your

preamplifier

and

power

amplifier.

Connect

your

player,

tuner,

tape

deck,

video

recorder,

laser

disc,

etc.

the

specific

left/right

pream-

plifier

inputs.

With

phono-equipped

models,

(BP-25P

BP-25MC),

connect

your

phono

cables

the

phono

input

jacks.

your

turntable

leads

have

separate

ground

wire,

may

connected

the

ground

lug

adjacent

the

phono

inputs

the

rear

panel.

Next,

insert

the

5-pin

din

cable

from

the

out-

board

power

supply

into

the

input

connector

located

the

rear

the

preamplifier.

Then

plug

the

power

supply

into

appropriate

power

outlet.

The

preamplifier

powered

engaging

the

slide

switch

located

the

front

the

extemal

power

supply.

The

“green”

LED

the

outboard

power

supply

and

the

preamplifier

front

panel

indicates

power-on.

the

preamplifier

has

been

placed

the

“mute”

position

operating

the

volume

button

the

remote

will

automatically

un-mute

the

BP-25

pream-

plifier,

turning

the

LED

from

red

green.

the

BP-20

you

must

manually

activate

the

mute

toggle

the

front

panel.

Both

the

Mute

switch

and

the

Polarity

Invert

switch

are

momentary-toggle

types,

oper-

ated

push-and-telease.

from

both

the

preamplifier

and

the

power

amplifier(s)

for

complete

system

shut-down.

Option

two

allows

the

power

amplifier(s)

turned

off

with

the

mute

button

the

hand-held

remote

control

unit

the

mute

toggle

the

front

panel

the

preamplifier.

This

will

shut

down

your

systern

“for

the

mght’,

completely

removing

power

from

the

amplifiers,

but

leaving

the

preamp

the

Mute/

standby

mode,

indicated

the

red

LED

the

prearpli-

fier’s

front

panel.

Please

refer

the

diagram

the

included

separate

instruction

sheet

for

further

clarity

and

optional

wiring

afrangements.

The

Bryston

BP-20

and

BP-25

preamps

also

feature

two

pairs

balanced

XLR

input

jacks.

Many

signal

sources,

including

CD-players

and

separate

D/A

converters

are

now

available

with

Balanced

outputs

for

munimum

noise

pickup

the

cables.

The

tape

loop

may

used

insert

surround

sound

processor,

cassette

tape

deck

video

tape

recorder

into

your

system.

Plug

your

tape

deck

extemal

proces-

sor’s

imput

cables

into

the

“To

Tape’

jacks,

and

the

proces-

sor

deck’s

output

cables

into

the

‘From

Tape’

jacks

the

rear

the

preamp.

The

tape

processor

loop

may

operated

via

the

toggle

switch

located

the

front

panel

the

preamplifier.

Page

Input

and

Output

Connectors:

Bryston

preamplifiers

are

equipped

with

five

paits

RCA

input

connectors,

two

pairs

balanced

XLR

input

connectors

and

one

pair

RCA

tape

input

jacks.

The

balanced

inputs,

(pin-1

ground,

pin-2

post-

tive

and

pin-3

negative).

All

inputs

employ

fully

dis-

crete

active

input

circuitry.

Two

pairs

RCA

main

outputs,

one

pair

RCA

tape

outputs

and

one

pair

balanced

XLR

outputs

are

also

provided.

All

input

and

output

connectors

the

BP-20

Bryston

BP-25

Remote

Control:

The

Bryston

model BP-25

supplied

with

hand-held

remote

control

unit.

The

remote

features

in-

clude

Volume

control,

Mute,

and

Polarity

Invert.

All

remote

control

functions

may

operated

manually

from

the

front

panel

the

preamplifier

desired.

The

Volume

Control

motor-driven

design.

This

approach

ensures

the

lowest

distortion

with

maxt-

mum

long

term

reliability.

The

Polarity-Invert

switch

allows

you

reverse

the

absolute

phase

the

audio

signal,

(not

confused

with

left-versus-right

channel

phase),

because

polarity

reversal

can

occur

the

recording

chain.

(In

fact,

our

investigations

show

that

polarity

not

consistently

main-

tained

commercial

recordings).

desirable

main-

tain

absolute

phase

originally

played

the

recording

Bryston

MMM

and

Phono

Section:

Bryston’s

Phono

section

available

the

BP-20

BP-25

preamplifiers.

features

state-of-the-art

accu-

racy

equalization,

extremely

low

noise

and

distortion,

and

provides

headroom

margins

sufficient

prevent

overload

from

any

known

phono

source.

The

Phono

section

may

ordered

either

two

versions:

Moving-Coil,

(Model

BP-20MC

BP-

25MC),

Moving-Magnet,

(Model

BP-20P

BP-25P).

The

BP-20MC

and

the

BP-25MC

provides

front

panel

switch

choose

the

additional

gain

required

for

moving

coil

cartridges

Gee

diagram

page

4).

access

the

Phono

section

theBP-20MC

BP-25MC,

simply

plug

your

tumtable

interconnect

leads

into

the

Phono

‘inputs

the

rear

panel

the

preampli-

fier

Engage

the

MM/MC

Phono

togple-switch

located

the

front

panel

the

preamplifier

the

appropriate

moving-magnet

moving-coil

position

and

tum

the

“Source”

rotary

selector

knob

the

front

panel

and

BP-25

are

gold-plated.

Only

cables

with

high

quality

gold

plated

connectors

should

used

with

your

pteamp

avoid

noise

and

distortion

from

the

corrosion

which

will

eventually

appear

poorly

plated

cable

connectors.

Bryston

offers

RCA

XLR

cables

with

con-

nectors

gold-plated

microinches,

(up

times

heavier

than

standard

gold-flashed

cables).

Standard

and

meter,

custom-length

cables,

are

available.

hall,

that

will

provide

the

most

accurate

representation

the

original

wavefront.

This

may

audible

some

cases

realistic

rendition

musical

transients

when

the

proper

polarity

for

that

recording

selected.

The

Bryston

BP-20/BP-25

preamplifiers

maintain

non-

inverting

polarity

the

Main

output

for

all

inputs

when

the

pilot

light

green,

and

inverting

polarity

for

all

inputs

when

the

LED

yellow.

The

“lo

Tape’

outputs

are

always

non-inverting.

The

Mute

control

mutes

the

output

the

preamplifier

allow

for

interruptions

without

affecting

the

volume

control

setting.

(Refer

also

the

Power

Supply

section

this

instruction

sheet

for

information

regarding

remote

Amplifier

control

via the

Mute

switch).

Phono.

(Please

ensure

the

MM/MC

switch

the

correct

position

for

your

cartridge,

your

system

will

display

audible

problems,

such

poor

frequency

te-

sponse,

low

output,

both).

your

turntable

provides

separate

ground

lead,

system

noise

may

minimized

connecting

the

ground

lug

adjacent

the

phono

inputs

the

rear

panel.

The

BP-20P

and

BP-25P

hookup

procedure

similar,

with

the

exception

that

there

front

panel

switch

between

and

MC.

(This

replaced

with

the

Stereo/Mono

switch).

The

Bryston

BP-20

and

BP-25

are

line-level

preamplifiers

only.

You

may

acquire

Moving-Magnet

Moving,

Coil

phono

capability

returing

the

factory

for

updating.

also

offer

the

Moving-Coil

setup

stage,

outboard

unit

(IF-1),

your

preamplifier

already

contains

Moving-Magnet

phono

section.

Page

BP-20

Front

Panel

VOLUME

OUT

BP-25

Froni

Panel

VOLUME

BPRES

BRYSTON

PREAMPLIFIERS

BP-25

and

BP-20

Functions:

MPS-1

POWER

SUPPLY

LED

indicates

GREEN

when

power

on.

Provides

12-Volt

supply

for

remote

turn-on

Bryston

THX

power

amplifier(s)

others

equipped.

PREAMPLIFIER

LED:

Indicates

RED

when

output

muted.

GREEN

indicates

output

non-inverting

polarity.

YELLOW

indicates

output

has

inverted

polarity.

HEADPHONE

OUTPUT

(BP-25):

Allows

monitoring

any

input

source

with

the

use

head-

phones.

recommended

that

you

use

headphones

with

input

impedances

greater

than

ohms

for

optimal

performance.

you

wish

mute

your

loudspeakers

while

listening

your

headphones

simply

engage

the

MUTE

switch

the

preamphi-

fier

(LED

turns

red).

sure

#of

use

your

remote

control

(use

the

front

panel

volume

control)

adjust

the

volume

while

listening

your

headphones,

the

remote

will

‘unmute’

the

preamplifier

‘volume

up’.

FRONT

PANEL

CONTROLS:

MUTE/NORMAL

TOGGLE:

Mutes

releases

mute

the

main

outputs,

(not

“To

Tape’

outputs),

without

changing

the

volume

control

setting,

each

time

pushed.

POLARITY/INVERT

‘TOGGLE:

Reverses

polarity

main

outputs

each

time

pushed.

(GREEN

LED

indicates

positive

polarity,

YELLOW

LED

indicates

inverse

polarity).

VOLUME:

Rotary

control

varies

the

output

level

the

‘MAIN

OUTPUTS’,

(does

not

effect

“TO

TAPE’

outputs).

BALANCE:

Rotary

control

adjusts

the

left-versus-nght

chan-

nel

levels.

The

Balance

Control

tailored-inflection

type

which

has

very

gradual

action

near

the

center

rotation

allowing

fine

adjustments

the

stereo

mage.

For

convenience

the

electncal

center

the

control

detented.

SOURCE:

Rotary

knob,

determines

which

input

will

appear

the

“TO

TAPE’

outputs

for

recording

processing,

well

determining

which

program

available

the

Main

outputs.

(When

the

“TAPE/SOURCE’

switch

‘Tape’

position,

“TAPE

FROM?

inputs

appear

Main

Outputs).

MONO/STEREO

SWITCH:

‘Stereo’

position

provides

two-channel

stereo

the

Main

outputs.

‘Mono’

position

sums

the

main

outputs

monaural.

The “TO

TAPE?

outputs

are

always

stereo.

(Switch

not

present

BP-25MC),

PHONO

SWITCH

(BP-25MC

only):

Allows

the

selection

either

Moving-Magnet

Moving-Coil

phono.

(BP-25MC

preamplifiers

are

equipped

with

Phono

MM/MC

switch

place

the

Mono/Stereo

switch).

TAPE/SOURCE

SWITCH:

Source

(down)

position

moni-

tors

whichever

input

selected

the

rotary

SOURCE

selector

knob.

Tape

(up)

position

provides

monitoring

the

‘FROM

TAPE’

input

for

A/B

comparison

with

the

source.

Should

external

processor

equalizer

connected

the

TAPE

LOOP,

the

“TAPE/SOURCE”

switch

will

act

in/out

switch

for

the

external

equipment.

REAR

PANEL

CONNECTORS:

BALANCED

OUTPUTS:

Output

taken

from

the

three-

“XLR”

type

connectors.

Pin-1

ground

Pin-2

the

positive

(+)

output

and

the

inverted

output.

The

output

“ACTIVE

BALANCED”

(no

transformer).

Never

connect

each

other,

any

ground.

‘The

outputs

are

capable

driving

volts

any

load

600

ohms

greater

balanced

operation.

UNBALANCED

OUTPUTS

There

are

two

parallel

unbal-

anced

outputs

for

each

channel

available,

utilizing

gold-plated

RCA-style

connectors.

The

output

always

in-phase

with

the

input,

and

capable

delivering

volts

into

any

load

600

ohms

greater.

TO-TAPE-FROM:

The

‘TO

TAPE’

outputs

are

selected

the

rotary

“SOURCE”

knob

and

are

provided

recording

output.

This

feed

unaffected

the

operation

other

front

panel

controls.

The

‘FROM

TAPE’

(unbalanced

RCA)

input

useful

for

monitoring

tape

playback

processed

signals.

Mov-

ing

the

“T'ape/Source”

toggle

‘Tape’

(up)

position

monitors

the

recorded

signal

recorders

equipped

with

separate

playback

head,

the

processed

signal

when

using

signal

processor.

Input

sensitivity

500mv,

input

impedance

10K

ohms

UNBALANCED

INPUTS:

Input

connectors

are

gold

plated

RCA

Phono

jacks.

Input

sensitivity

500mv,

input

impedance

50K

ohms.

BP-25P,

Phono

input

impedance

47K,

sensitivity

mV.

BP-25MC,

MMohms.

Phono

input

above,

Phono

input

impedance

180

Ohms,

sensitivity

0.35

mV.

BALANCED

INPUTS:

Balanced

input

connectors

are

gold-

plated

3-pin

“XLR”

style

connectors.

ground,

positive

input

(+)

and

the

inverting

input

(-).

Input

sensitivity

volt,

input

impedance

15k

Page

BRYSTON

LTD.

P.O.

BOX

2176

677

NEAL

DRIVE

PETERBOROUGH,

ONTARIO

CANADA.

KSJ

7Y4.

Bryston

products

are

warranted

free

from

manufacturing

defects

for

minimum

twenty

years

from

the

original

date

manufacture.

This

includes

parts,

labour

and

return

shipping

the

first

owner

and

all

subsequent

owners.

Warranty

coverage

automatic

and

com-

mences

with

the

original

date

manufacture

which

kept

file

Bryston.

the

event

defect

malfunction,

Bryston

will

remedy

the

problem

repair

replace-

ment,

deem

necessary,

restore

the

product

full

performance.

This

warranty

considered

void

the

defect,

malfunction

failure

the

product

any

component

part

was

caused

damage

(not

resulting

from

defect

malfunction)

abuse

while

the

possession

the

customer,

tampering

persons

other

than

factory-

authorized

service

personnel,

failure

com-

ply

with

Bryston

operating

instructions.

This

warranty

gives

you

specific

legal

rights

and

you

may

also

have

other

rights

which

may

—

vary

from

province

and

country

country.

BRYSTON

SERVICE

CANADA:

STEINWAY

BLVD.,

UNIT

ETOBICOKE,

ONTARIO

MSW

6T3

PHONE:

416-675-2585

FAX:

416-675-3103

BRYSTON

SERVICE

USA:

COVENTRY

STREET

NEWPORT,

VERMONT

PHONE:

802-334-1201

FAX:

802-334-6658

BRYSTON

SERVICE

OUTSIDE

CANADA:

CONTACT

YOUR

LOCAL

DISTRIBUTOR

OR:

CALL

BRYSTON

DIRECTLY

AT:

PHONE:

705-742-5325

FAX:

705-742-0882

www.bryston.ca

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