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Audiophile

products

PILTA

60

tNItG«A?S&

a'tRfO

AMfums

/IRCAM

^

from

A&R

Cambridge

Delta

60

integrated

amplifier

handbook

Delta

60

integrated

amplifier

handbook

Introduction

The

Arcam

Delta

60

integrated

amplifier

is

a

product

constructed

to

a

purist

design,

as

evident

by

its

lack

of

tone

controls,

which

will

meet

the

requirements

of

the

most

demanding

listener.

Combining

excellent

sound

quality

with

sleek,

sophisticated

styling,

the

Delta

60

will

form

the

heart

of

any

high

quality

sound

system.

It

is,

of

course,

ideally

suited

for

use

with

our

existing

Delta

range

units,

especially

the

Delta

80

tuner.

Delta

70.2

CD

player

and

Black

Box

D/A

converter.

The

Delta

60

has

five

switchable

inputs

accepting

signals

from

compact

disc,

turntable

(with

facilities

for

moving

magnet

and

moving

coil

cartridges),

tuner

and

two

tape

recorders.

The

Delta

60

offers

further

versatility

by

providing

outputs

for

headphones

and

two

sets

of

loudspeakers

and

by

allowing

mono

operation.

Please

study

these

instructions

carefully

to

ensure

that

you

get

the

best

from

your

Delta

60.

Remember

that

your

dealer

is

there

to

help

you.

He

has

full

knowledge

of

all

Arcam

products

and

considerable

experience

of

their

use

in

a

variety

of

systems.

If,

however,

he

is

unable

to

answer

your

query

then

please

contact

us

at

the

factory.

2

Delta

60

integrated

amplifier

handbook

Installing

and

using

your

Delta

60

Amplifier

Mains

supply

The

Arcam

Delta

60

may

be

supplied

to

work

on

any

of

the

following

AC

voltages:

110/220V

and

120\//240\/

(1OOV

units

can

be

supplied

to

special

order).

Check

that

your

local

mains

supply

voltage

agrees

with

the

voltage

setting

indicated

on

the

back

panel

of

the

Delta

60.

If

not,

please

contact

the

factory

or

your

national

distributor

for

details

of

how

to

proceed

further.

A

detachable

mains

lead

is

supplied

with

the

Delta

60.

The

cores

of

this

lead

are

coloured

in

accordance

with

the

following

code:

Green

and

yellow

-

Earth

Blue

-

Neutral

Brown

-

Live

Note:

Export

units

for

certain

markets

have

moulded

mains

plugs

fitted

as

standard.

As

the

colours

in

the

mains

lead

may

not

correspond

with

the

coloured

markings

identifying

the

terminals

in

your

plug

proceed

as

follows:

The

wire

which

is

coloured

green

and

yellow

must

be

connected

to

the

terminal

in

the

plug

which

is

marked

by

the

letter

E

or

to

the

safety

earth

symbol

or

coloured

green

or

green

and

yellow.

The

wire

which

is

coloured

blue

must

be

connected

to

the

terminal

which

is

marked

by

the

letter

N

or

coloured

black

or

blue.

The

wire

which

is

coloured

brown

must

be

connected

to

the

terminal

which

is

marked

by

the

letter

L

or

coloured

red

or

brown.

Fuses

If

the

mains

plug

is

fused

fit

a

5

amp

fuse.

The

AC

supply

inlet

to

the

Delta

60

uses

a

standard

lEC

chassis

mounting

plug.

The

lEC

line

socket

on

your

mains

lead

and

the

lEC

plug

on

the

Delta

60

are

a

tight

fit;

before

first

using

the

Delta

60

it

is

therefore

important

to

ensure

that

the

socket

is

firmly

pushed

home

Into

the

chassis

plug.

Under

no

circumstances

should

the

Delta

60

cover

be

removed

unless

the

supply

Is

disconnected

at

the

wall

socket.

Notice

1

Please

retain

the

carton

and

all

packaging

materials

provided

with

this

equipment

so

that

it

may

be

repacked

correctly

if

it

ever

becomes

necessary

to

transport

the

unit

or

to

return

it

for

service.

2

If

servicing

is

required

then

the

equipment

should

be

properly

packed

and

returned

to

the

dealer

from

whom

it

was

purchased.

It

is

essential

to

include

a

covering

letter

giving

your

name

and

address

and

a

brief

but

thorough

description

of

the

fault.

Connections

It

is

advisable

that

your

system

be

switched

off

before

connecting

it

up

to

the

Delta

60.

This

will

avoid

possible

damage

to

your

loudspeakers.

At

the

very

least

ensure

that

the

volume

control

on

your

amplifier

is

turned

down,

or

an

unused

input

is

selected.

3

Delta

60

integrated

amplifier

handbook

MCI

MM

cartridge

Figure

1

selector

switch

All

audio

inputs

and

tape

outputs

are

via

RCA

phono

connectors.

All

the

phono

sockets

on

the

Delta

60

are

marked

'L'

for

left

and

'R'

for

right

channels,

with

the

left

channels

nearer

the

top

of

the

cabinet.

Your

connection

ieads

wiil

be

marked

'L'

and

'R'

or

wili

have

a

white

or

biack

piug

for

left

and

a

red

plug

for

right.

Disc

input

For

the

purposes

of

playing

records

the

Delta

60

can

accept

both

moving

magnet

and

moving

coil

cartridges.

For

either

type

of

cartridge

the

plugs

on

your

turntable

lead

should

be

connected

to

the

disc

input

sockets

on

the

rear

panei

of

the

unit.

A

switch

just

to

the

side

of

these

sockets

allows

the

selection

of

either

MM

or

MC

input.

The

switch

should

be

left

out

for

use

with

moving

magnet

or

high

output

moving

coil

cartridges

and

depressed

for

use

with

normai

(iow

output)

moving

coil

cartridges.

If

your

turntable

has

a

separate

earth

lead

then

this

should

be

attached

firmly

to

the

earth

terminal

on

the

rear

of

the

amplifier.

Note

Never

operate

the

mm/mc

switch

on

the

rear

of

the

amplifier

with

THE

VOLUME

CONTROL

TURNED

UP

AS

THE

RESULTANT

ELECTRICAL

SURGE

MAY

DAMAGE

YOUR

LOUDSPEAKERS.

Compact

Disc

input

This

input

is

suitabie

for

use

with

any

compact

disc

player

(and

with

our

own

Deita

Black

Box

D/A

converter

coupled

with

a

CD

Player).

Connect

your

CD

player

to

the

amplifier

using

the

phono

sockets

marked

CD.

Note

Aithough,

like

the

tuner

and

tape

inputs,

the

CD

has

a

'flat'

frequency

response,

its

sensitivity

is

lower,

to

take

account

of

the

high

output

signals

generated

by

CD

players.

It

is

possible

to

use

either

a

tuner

or

another

line

source

in

the

CD

input

but

the

ampiifier's

voiume

control

will

have

to

be

turned

up

to

obtain

a

volume

similar

to

that

found

when

using

other

inputs.

4

Delta

60

integrated

amplifier

handbook

Tuner

input

The

tuner

input

is

suitable

for

use

with

almost

any

AM

or

FM

tuner.

Connect

your

tuner

to

the

amplifier

using

the

phono

sockets

marked

tuner.

Tape

input/output

The

Delta

60

has

connections

for

two

tape

recorders

and

is

suitable

for

use

with

almost

any

cassette,

reel

to

reel

or

video

tape

recorder:

1

connect

the

'record'

leads

of

your

tape

recorder

to

the

phono

sockets

marked

'out'

on

the

rear

of

the

Delta

60

using

phono/

phono

leads

2

connect

the

'playback'

leads

of

your

tape

recorder

to

the

phono

sockets

marked

'in'

on

the

rear

of

the

Delta

60

using

phono/

phono

leads

Loudspeakers

The

loudspeaker

outputs

are

suitable

for

driving

loudspeakers

in

the

range

4-16ohms

impedance.

The

loudspeaker

output

sockets

will

accept

4mm

(banana)

plugs.

A

set

of

4

suitable

plugs

is

supplied

as

standard

with

the

Delta

60.

The

Delta

60

has

two

sets

of

speaker

outputs,

marked

main

and

switched

(SP2).

The

main

outputs,

which

offer

a

slightly

superior

sound

quality

to

the

switched,

are

suitable

for

use

where

loudspeakers

are

to

be

used

alone

or

where

loudspeakers

and

headphones

are

to

be

used

at

the

same

time.

The

switched

(SP2)

outputs,

in

addition

to

the

above,

offer

the

possibility

of

using

headphones

only.

The

switched

(SP2)

outputs

are

operated

by

depressing

the

SP2

switch

on

the

front

panel

of

the

amplifier.

When

the

SP2

switch

is

depressed

the

operation

of

the

switched

outputs

is

identical

to

that

of

the

main

outputs.

When

the

switch

is

out

the

switched

outputs

are

off,

allowing

headphones

to

be

used

alone.

The

switched

(SP2)

outputs

also

give

the

opportunity

of

using

two

sets

of

8ohm

impedance

(or

higher)

loudspeakers

with

the

Delta

60.

By

connecting

one

set

of

speakers

to

the

maih

outputs

and

one

to

the

switched

and

by

depressing

the

SP2

switch

on

the

front

of

the

amplifier

it

is

possible

to

drive

both

sets

at

once.

Loudspeaker

connections

1

For

both

main

and

switched

connections

connect

the

negative

side

(usually

black)

of

your

left

hand

speaker

to

the

black

terminal

of

the

two

sockets

marked

'L'.

The

other

(the

positive

side

or

red)

should

be

connected

to

the

red

terminal

marked

'L'.

2

Repeat

for

the

right

hand

loudspeaker.

Heatsfnk/ventilation

requirements

The

heat

produced

by

the

amplifier

is

dissipated

into

the

air

by

the

finned

heatsink

on

the

rear

which

will,

along

with

the

surrounding

panel,

become

warm

while

the

amplifier

is

on.

The

whole

back

panel

may

become

quite

hot

if

the

amplifier

is

run

near

full

power.

This

is

perfectiy

normai.

However,

if

it

becomes

too

hot

to

touch,

switch

off

the

amplifier

at

once

and

consult

your

dealer.

It

is

very

important

that

there

is

adequate

ventiiation

for

the

whole

of

the

amplifier,

but

especially

for

the

rear.

It

is

also

important

to

remember

not

to

place

records

on

top

of

iti

5

Delta

60

integrated

amplifier

handbook

Front

panel

controls

/IRCAM

6

DISC

CD

TUNER

TAPE

1

TAPE

2

MONO

SP

2

Figure

2

Power

switch

The

Delta

60

is

turned

on

by

depressing

the

power

switch.

The

small

rectangular

LED

(light

emitting

diode)

above

the

switch

will

glow

green.

After

several

seconds

you

may

hear

a

gentle

click

from

inside

the

amplifier.

This

indicates

that

the

speaker

protection

relay

has

been

released

and

that

the

amplifier

is

ready

for

use.

To

turn

the

unit

off

depress

the

power

switch

again

so

that

it

unlatches.

The

green

LED,

which

indicates

that

the

dc

power

supplies

within

the

amplifier

are

operating,

will

continue

to

glow

for

a

short

time

after

the

unit

has

been

switched

off

as

the

internal

power

supplies

discharge.

Note

The

Delta

60

will

play

music

within

seconds

of

switching

on.

However,

in

common

with

other

audiophile

products,

the

internal

circuits

take

some

time

to

stabilise

fully

and

the

very

best

sound

quality

may

not

be

obtained

until

the

amplifier

has

had

a

reasonable

time

(possibly

up

to

an

hour

or

two)

to

warm

up.

6

DELTA

60

INTEGRATED

STEREO

AMPLIFIER

Input

selection

The

Delta

60's

five

inputs

are

selected

via

5

rectangular

buttons

on

the

unit’s

front

panel.

To

select

the

input

required

depress

the

appropriate

input

selector.

Volume

control

The

volume

control

is

of

a

split

type

and

allows

you

to

adjust

the

levels

of

the

left

and

right

channels

for

both

loudspeakers

independently.

Normally,

the

two

halves

of

the

control

knob

rotate

together

as

they

are

locked

together

by

a

friction

clutch

inside

the

volume

control

itself.

However,

by

holding

the

rear

part

of

the

control

firmly

with

the

first

finger

and

thumb

of

one

hand,

it

is

possible

to

alter

the

relative

position

of

the

two

parts

of

the

knob

and

thus

compensate

for

level

differences

caused

by

the

nature

of

the

input

signal

or

due

to

room

acoustics.

Delta

60

integrated

amplifier

handbook

Mono

The

amplifier

is

in

its

normal

stereo

mode

when

the

mono

button

is

out.

In

this

position,

the

left

and

right

input

signals

are

amplified

independently

to

feed

the

corresponding

loudspeaker

outputs.

When

the

mono

button

is

pushed

in

the

left

and

right

signals

are

mixed

together

and

the

combined

signal

is

routed

to

both

loudspeakers.

This

is

particularly

useful

when

listening

to

mono

records

or

tapes

(as

much

low

frequency

out-of-phase

rumble

can

be

eliminated)

or

to

remove

excessive

hiss

from

FM

broadcasts.

It

is

also

invaluable

for

checking

speaker

phasing

in

a

stereo

hi

fi

system.

Tape

2

recording/monitoring

All

sources,

disc,

CD,

tuner

and

Tape

I

can

be

recorded

via

the

Tape

2

connections.

To

record

an

input

select

the

required

source

and

set

your

recorder

into

the

record

mode.

If

your

tape

machine

is

a

three

head

type

suitable

for

A/B

monitoring

then

pressing

the

Tape

2

switch

will

allow

off

tape

monitoring.

Playback

Press

the

Tape

2

switch

and

set

your

recorder

into

the

playback

mode.

Phones

The

headphone

socket

will

accept

any

headphones

fitted

with

a

standard

quarter

inch

(6.35mm)

stereo

jack

plug.

The

headphones

may

be

operated

in

parallel

with

the

loudspeaker

outlets,

or

not,

as

you

wish

(see

Loudspeakers

above).

Tape

recording

The

Delta

60

has

facilities

for

two

tape

recorders.

The

Tape

I

input

is

most

suitable

for

use

with

two

head

tape

recorders

and

video

recorders.

The

Tape

2

input,

in

addition

to

the

above,

is

ideally

suited

for

use

with

three

head

tape

machines,

where

tape

monitoring

is

a

requirement.

Tape

1

recording

To

record

an

input

simply

select

the

required

source

-

either

Disc,

CD

or

Tuner

-

and

set

your

recorder

into

its

recording

mode.

Note,

it

is

not

possible

to

record

signals

from

the

Tape

2

source

to

Tape

1.

Playback

Depress

the

Tape

1

switch

and

set

your

recorder

into

the

playback

mode.

Delta

60

integrated

amplifier

handbook

Cartridge

loading

modules

These

optional

accessories

are

passive,

switchable

modules

designed

to

modify

the

input

impedance

of

the

amplifier

in

order

to

obtain

the

best

match

with

the

cartridge

in

use.

As

the

Delta

60

has

a

single

set

of

disc

inputs

(switchable

to

MM

or

MC

via

the

switch

on

the

rear

panel),

then

two

separate

loading

modules

-

one

for

moving

magnet

(type

ULM/M)

and

one

for

moving

coil

(type

ULM/C)

cartridges

-

are

available

on

request

from

your

dealer,

distributor

or

the

factory.

These

modules

are

user

adjustable

via

a

series

of

small

switches.

The

loading

modules

should

be

plugged

into

the

amplifier

in

the

position

shown

in

fig

3.

A

set

of

instructions

is

provided

with

each

module.

Care

should

be

taken

to

ensure

that

only

an

MM

loading

module

is

used

in

conjunction

with

moving

magnet

or

high

output

moving

coil

cartridges

and

that

only

an

MC

loading

module

is

used

in

conjunction

with

normal

(low

output)

moving

coil

cartridges.

Under

no

circumstances

adjust

the

loading

module

switches

when

the

amp

is

switched

on

and

the

volume

turned

up

as

severe

damage

may

occur

to

your

amplifier

or

speakers.

It

must

be

emphasised

that

these

passive

modules

mainly

affect

the

sound

balance

and

frequency

response.

They

will

have

little

or

no

effect

on

the

sensitivity

of

the

amplifier.

Most

cartridges

will

perform

satisfactorily

without

any

loading

module.

Hints

and

tips

Getting

the

best

from

your

Delta

60

Connecting

cables

\X/hen

dealing

with

high

quality

hi-fi

systems,

such

as

those

based

around

a

unit

with

the

resolving

power

of

the

Delta

60,

the

question

of

connecting

cables

becomes

of

paramount

importance.

The

higher

the

resolution

of

the

individual

components

involved,

the

higher

the

chance

of

some

of

this

hard

won

clarity

being

lost

in

the

cables.

We

strongly

recommend

that

only

first

class

loudspeaker

and

interconnect

cables

be

used

with

your

hi-fi

system.

We

have

found

interconnect

and

loudspeaker

cables

from

the

AudioQuest

range

to

be

particularly

suitable.

Detailed

information

on

the

AudioQuest

range

of

cables

may

be

obtained

from

your

dealer

or

the

factory.

As

a

rule

of

thumb

you

might

budget

to

spend

between

5%

and

20%

of

the

price

of

your

system

on

cable.

Surprising

though

it

may

seem

this

can

be

one

of

the

most

effective

upgrades

you

can

carry

out

on

your

system.

We

suggest

that

you

discuss

the

question

of

interconnect

and

loudspeaker

cables

with

your

dealer.

8

Delta

60

Integrated

amplifier

handbook

Internal

Fuses

Loudspeaker

fuses

These

are

2

amp

fast

blow

20mm

x

5mm

diameter

in

all

models.

They

may

blow

if

the

amplifier

is;

run

continuously

at

high

level

into

the

correct

loudspeaker

load

run

at

high

level

into

a

loudspeaker

of

too

low

an

impedance

(less

than

4

ohms)

run

into

a

short

circuit

used

to

drive

two

sets

of

low

impedance

loudspeakers

at

once.

They

are

user-replaceable

and

two

spares

are

provided.

However,

if

they

blow

consistently

without

any

of

the

above

conditions

being

apparent

please

consult

your

dealer.

Do

not

replace

with

a

fuse

of

greater

value

than

2

amps

(or

with

a

'slow

blow'

or

'anti-surge'

fuse)

since

this

will

endanger

the

amplifier

and

your

loudspeakers

and

invalidate

your

guarantee.

Mains

fuse

The

fuse

type

is

1.25

amp

anti-surge

(slow

blow)

20mm

x

5mm

diameter

in

220V

and

240V

models,

2.5

amp

anti-surge

in

100-120V

models.

This

fuse

is

designed

to

protect

against

faults

in

the

amplifier,

transformer

and

mains

switch.

It

is

not

user-replaceable.

If

this

fuse

blows

there

is

probably

a

fault,

and

the

amplifier

should

be

returned

to

your

dealer.

Removal

of

top

plate

In

order

to

inspect

or

change

fuses,

or

to

reach

the

cartridge

loading

module

pins,

you

will

need

to

remove

the

top

plate

from

the

amplifier.

BEFORE

REMOVING

THE

COVER,

ALWAYS

SWITCH

OFF

THE

AMPLIFIER

AND

DISCONNECT

FROM

THE

MAINS

SUPPLY.

Note

that

the

mains

fuse

remains

live

whenever

the

amplifier

is

plugged

into

the

mains,

even

when

the

amplifier

power

switch

is

in

the

off

position.

To

remove

the

top

plate

unscrew

the

two

black

headed

screws

at

the

top

of

the

rear

panel

using

a

No.

I

'Pozidriv'

screwdriver

(see

figs.

1

and

3).

Then

lift

the

top

plate

vertically

and

pull

it

backwards

slightly

to

release

it.

Replacement

is

simply

the

reversal

of

this

procedure.

Figure

3

9

Delta

60

integrated

amplifier

handbook

Check

list

Should

you

have

any

difficulty

in

operating

your

amplifier,

check

the

following

before

suspecting

that

a

fault

has

developed.

No

power

and

LED

not

illuminated.

Check

that;

1

the

mains

supply

is

connected

and

that

the

mains

lead

is

fully

home

in

the

mains

inlet

socket

at

the

rear

of

the

amplifier

2

the

mains

is

switched

on

and

that

the

power

switch

on

the

front

panel

is

depressed

and

has

fully

latched

3

the

fuse

in

the

mains

plug

has

not

blown

and

that

the

mains

socket

in

the

wall

is

live

(test

with

another

item/appliance)

Power

on

and

LED

illuminated

but

no

output

from

the

amplifier.

Check

that;

1

the

amplifier

is

connected

to

the

desired

input

and

that

the

correct

input

on

the

amplifier

is

selected

2

the

loudspeakers

are

connected

correctly

to

the

amplifier

3

if

you

have

your

loudspeakers

connected

to

the

outlets

marked

'Switched

(SP2)',

that

you

have

also

depressed

the

switch

marked

SP2

on

the

front

panel

4

the

volume

control

is

not

set

to

minimuim

5

if

disc

is

selected,

that

the

cartridge

selector

switch

is

set

to

the

correct

type

of

cartridge

NB

Do

not

operate

this

switch

with

the

volume

control

turned

up

6

if

CD

is

selected

your

machine

is

playing

a

CD

7

both

speaker

fuses

have

not

been

blown

by

a

previous

user

Power

on

and

LED

illuminated

but

output

from

one

loudspeaker

only.

Check

that;

1

b

oth

loudspeakers

are

plugged

into

the

correct

amplifier

outlets.

Note,

the

amplifier

may

appear

to

play

in

mono

if

the

loudspeakers

are

inadvertently

plugged

into

the

direct

and

switched

outputs

of

one

channel

2

both

the

left

and

right

channels

of

the

selected

source

are

connected

correctly

and

the

input

wiring

is

not

faulty

(check

by

swapping

over

the

left

and

right

input

connectors)

If

in

doubt

contact

your

dealer

3

one

section

of

the

volume

knob

is

not

set

to

minimum

4

one

speaker

fuse

is

not

blown

Loud

hum

heard

through

loudspeakers

when

disc

is

selected.

Check

that;

1

the

ground

lead

from

the

turntable

(if

fitted)

is

connected

firmly

to

the

ground

terminal

on

the

rear

of

the

amplifier

2

the

amplifier

is

correctly

earthed

via

the

mains

lead

3

your

cartridge

is

not

sited

directly

above

your

amplifier's

transformer

(Move

the

amplifier

away

and

check

if

the

hum

level

changes).

4

other

transformers

in

the

vicinity

are

not

radiating

into

the

Delta

60

Loud

hum

heard

through

only

one

loudspeaker

when

disc

Is

selected.

Check

that;

1

The

ground

wire

is

not

faulty

within

the

respective

channel's

lead.

This

is

easily

checked

by

swapping

over

the

leads

and

checking

if

the

hum

moves

to

the

other

channel.

2

The

headshell

leads

connected

to

the

cartridge

on

the

respective

channel

are

not

faulty

or

loose.

If

in

doubt

please

consult

your

dealer.

10