Crown D-60 User manual

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D-60

DUAL-CHANNEL

,

POWER AMPLIFIER

www.SteamPoweredRadio.Com

I

§)

D-60

I IM-6

S6P2

-13-5

croUJn

I

INSTRUCTION

MANUAL

I

SERIAL

NO.

/

(:,II

I

ISSUED

TO

I

D-60

I DUAL-CHANNEL

POWER AMPLIFIER

I

CROWN

INTERNATIONAL

INC

. BOX

1000

ELKHART,

INDIANA

46614

www.SteamPoweredRadio.Com

I

FULL

THR

EE-

YEAR

WARRANTY

THE

WARRANTY

For

a period

of

three

yea.rs from

the

date

of

delivery

to

the

original Purchaser, Crown

Int

ernational, Inc.

(hereinafter

"Crown")

warrants

to

the

original

and any

subsequent purchaser

of

each new Crown

component

(except Crown recorders)

that

it

is free from

any

substantial defects

in

materials

or

workmanship

and

that

it

will

meet

or

exceed all advertised specifications

for

such

component.

NOT

IFICATION

OF

CLAIMS

The

Purchaser

must

notify

Cr

own

in writing

at

the

address

set

forth

below

of

any

claimed breach

of

war•

ranty.

Such notification shall

be

delivered

to

Crown within a reasonable length

of

time

llfter

the

discovery

of

the

claimed

defect

and

not

later

than

ninety

days

after

expiration

of

the

warranty

period. Within

ten

business days

after

r

eceipt

of

the

notification, Crown will request Purchaser

to

dd

iver

the

component

to

llD

authorizedservice

agency

for

repairs

or

will deliver

to

Purcl:iaser

written

authorization

to

return

the

component

to

Crown

for

fac-

tory

wuranty

service.

If

Crown's

(or

its

authorized

service agency's) inspection reveals

that

there

has

been

a

breach

of

the

warranty,

Crown

(or

its 11uthorized service dealer) will initiatecorrective repllirs within

thirty

days

after

receipt

of

the

component.

All

components

must

be

shipped

in

original

factory

pack, which

if

needed, may

be

obtained

from Crown free

of

charge.. All such repairs, including labor,

pa

.

rts

llOd

shipping costs within

the

United

States

wiJI

be

made

at

Crown's

expense. PurchllSCr

must

beu

the

expense

of

sh

ipping

the

component

between

any

foreign

country

llnd

the

part

of

entry

in

the

United States,

and

all taxes,

duties

and ot

her

custom's

for

such foreign shipments. WARRANTY

If

the

repairs

made

by

Crown

or

the

authorized

service dealerarc

not

satisfactory, Purchaser

sho

uld immcdi·

atdy

give

written

notification

to

Crown.

If

the

defect

or

malfunction remains

after

a reasonable

number

of

attempts

by

Crown

to

remedy

the

defect

or

malfunction,

the

Purchasershall

then

have

the

option

to

elect

either

a r

efund

for

or

replacement

without

charge

of,

the

Crown

component.

The

refund

shall

be

an

llmountequal

to

the

actual purchase price,

not

including any interest, insurllOce, closing costs llnd

other

finllnce chllrge, minus

reasonable depreciation

on

the

component.

If

a

refund

is demanded,

the

PurchllSCr

must

make

the

defective

or

malfunctioning

component

available

to

Crown free

and

clear

of

llll liens or

other

encumb

rances. ShouldCrown

fail

to

meet

its

obli.gation hereunder, PurchllSCr

may

sue Crown

to

secure

its

compliance

with

this

warranty. ANY

SUIT BY PURCHASER

FOR

BREACH

OF

THIS WARRANTY MUST BE FILED WITHIN

FOUR

(4) YEARS

OF

THE DATE

OF

DELIVERY

TO

THE

ORIGINAL PURCHASER.

WARRANTY VIOLATIONS

CROWN SHALL H

AVE

NO RESPONSIBILITY IF

TH

E COMPONENT HAS BEEN SUBJECT

TO

MISUSE,

ACCIDENT, NEGLECT

OR

FAILURE TO COMPLY WITH NORMAL MAINTENANCE PROCEDURES

OR

IF

THE

SER

I

AL

NUMBER HAS BEEN DEFACED, ALTERED

OR

REMOVED;

NOR

WILL CROWN ACCEPT

RESPONSIBILITY

FOR

OR

RESULTING FROM IMPROPER

ALTERAT

IONS

OR

UNAUTHORIZED

PARTS

OR

REPAIRS. THIS WARRANTY DOES NOT COVER ANY DAMAGE

TO

SPEAKERS OR ANY

OTHER

CONSEQUENTIAL DAMAGES RESULTING FROM BREACH

OF

ANY WRITTEN

OR

IMPLIED

WARRANTY. MODIFICATIONS

OF

EQUIPMENT

Crown reserves

the

right

to

modify

or

chllDge

equipment

in

whole

or

pan

at

llDY

time

prior

to

delivery thcrof,

in

order

to

include therein electrical

or

mcchllDical improvementsde

emed

appropriate

by

Cr

own,

but

without

in-

curring llny liability

to

modify

or

chllnge

any

equipment

previously delivered,

or

to

supply new equip

ment

in

accordllDce

with

llDY

ellrlicrspecification.

WARRANTY AL

TERAT

IONS

NO

PERSON HAS

THE

AUTHORI

TY TO

ENLARGE, AMEND

OR

MODIFY

THI

S WARRANTY. THE

WARRANTY IS

NOT

EXTENDED

BY

THE

LENGTH

OF

TIME

WH

ICH THE PURCHASER IS DEPRIVED

OF

THE USE

OF

THE

COMPONENT. REPAIRS AND REPLACEMENT PARTS PROVIDED PURSUANT

TO

THIS WARRANTY

SHALL

CARRY ONLY

THE

UNEXPIRED

PORT

ION

OF

THIS WARRANTY.

CR

OWN

INTERNATIONAL, INC.

1718

West Mishawaka Road, Elkhart, lndillDa 46S

14

OWNER

----------------------------------

ADDRESS

________________________________

_

THIS STATEMENT

OF

WARRANTY SUPERSEDES

ALL

OTHERS

CONTAINED IN THJS MANUAL

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I

TABLE

Of

CONTENTS

PAGE

Section 1

1.1

1.2

1.3

1.4

Section 2

2.1

2

.2

2.3

2.4

2.

4.1

2.

5

2.6

Section 3

3.1

3.2

3.3

3.4

3.5

Section 4

4.1

4.2

4.3

Section 5

DESCRIPTION

General ....................

..

..................................

..

.........................................................

....

........ 1

Specifications .............................................................................

..

....... 2, 3, 4,

5,

6, 7, 8, 9

Warranty ............................................................

..

...............................................

..

.

...

..

...... 10

Acces

so

ries .............................................................................

..

....

....................

..

.

...

..

....... 10

INSTALLATION

Unpacking ..............................................................

..

...

..

...

..........

...

..

..............

..

...........

11

Mounting ............................................

..

.......................

..

...................

..

.............................. 11

Normal Hi

-Fi

Installation ..........

..

.

..

.............

..

................................................................... 13

Conne

cting Output Lines ..................................................

..

.............................

..

............. 13

Mono Operation .

..

....

...

..

...

..

...

.......

....

.

..

...

........

...

..

.

..

.

..

......

..

......

..

....

......

..

.

..

...

..

........ 14

Connecting Input Lines ..................

..

....

..

...............................

..

........................................ 15

Connecting

Power

............................................................................................................ 16

OPERATING

INSTRUCTIONS

Controls and Adjustments ......................

..

...

..

.

..

............................................................

..

17

The Protection Mechanisms ........................................................................................... 17

Operating

Pre

cautions ..............................................................

..

..................................... 19

Load

Protection Methods

....

..

....

.

..

....

..

...

..

...

..

............

..

....

.

..

...

....

..

...

..

.

..

.....

19

Cleaning ...................................

..

.......

..

.

..

..............

..

........................................................... 20

CIRCUITRY

Principles

of

Operation .......................................................................

..

..........................

21

Test Procedures .................................................

..

..........

..

..........

...

.......

..

.....

..

.................

21

Service .........................................................................................

..

.............

..

.

..

.

..

..........

..

22

APPLICATION

NOTES

Note #1 V-I Limits of a

Load

.......................................................................................... 23

Note #2 Speaker Protection

......

...

..

....

..

.......

..

.........................

..

............................

...

.... 25

I

LIST

Of

ILLUSTRATIONS

I

TITLE

PAGE

1-1 D-60 Pictorial ...........................................................

....

.......

..

.....

...

.....

..

...........

..

................. 1

1-2 D-60 and

VFX-2

in Optional 5-R Enclosure ...................................

..

.....

....................... 10

2-1

End

-

Cap

/Bracket Mounting ..

...

..........

..

......

..

..................................................................

11

2-2 Mounting Dimensions

..

...................................................................................................

11

2-3 Normal

Hi

-

Fi

Installation .....................................................

..

..........................

...

....

..

....... 12

2-4

Rear

View

of Chassis ........................

..

...............

...

.....

.............................

..

....................... 13

2-5 Schematic for Full

Range

Electrostatic Speaker Connection

..

.................................... 13

2-6 Source Resistance and Damping Factor

vs

. Length and Size of Output

Leads

........ 14

2-7 D-60 Mono Hook-

up

...................................................

..

......

..

......

..

....

..

......

..

.

..

............ 15

2-8 Graph for

Sele

ction

of

Input Capacitor ................................

..

.

.....

...........

..

.................. 15

2-9

Low

-

Pa

ss Filters for

Severe

RF

at

Inputs .....................

..

.....

......

................................. 15

3-1 Operating Controls

..

.........

..

...............

'.

..

.........

..

............................................

..

.........

..

....

17

3-2 Graph

of

VI

Operating

Range

of

D-60 Output .........

..

....................

..

.......

..

................. 18

3-3

Fuse

Sele

c

tor

Nomograph for Loudspeaker Protection ....

..

...............

..

........................ 19

3-4

Relay-

Controlled Protector with Overload Indicator ....

...

..

............................................ 20

3-5 Turn-on-Transient Muter for

Load

Protection

..

.......................................................

..

20

Schematic

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I

Section 1

DESCRIPTION

1.1

GENERAL

FIG.

1 -1

INTEGRATED CIRCUIT STEREO

D-60

AMPLIFIER

The D-60 is a dual-channel medium power ampli-

fier for ultra-low distortion amplification from

5Hz to 20KHz with operation into loads

of

4 ohms

and higher. The

unit

features extremely low har-

monic and intermodulation distortion, very l

ow

noise, highest "damping factor," and quality parts

and workmanship. The

unit

may

be

wired to pro-

duce a balanced 25 volt monaural output. The am-

plifier is fully protected against mismatched and

shorted loads by a resetting

V-1

(volt-ampere)

limiter having no obnoxious muting or program

delays.

The power supply features large computer-grade

filter capacitors.

1

A total of 24 discrete transistors, 1 linear

IC

(dual

op amp), 14 diodes and 1 bridge rectifier are uti-

lized in a

CROWN-pionee

red Class

AB+B

output

circuit The effective number of semiconductors

is 40 transistors and 24 diodes

Th

e input voltage-amplifiers, (I

C),

are powered by

two voltage-regulated supplies. This results in

complete channel-to-channel isolation and inde-

pendence from line voltage variations.

Two level controls are mounted

on

the front panel

to allow balancing and optimizing of system levels.

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2

1.2

SPECIFICATIONS

1.2.1

STEREO

SPECIFICATIONS

I

Output Power

28

watts per channel mm1mum RMS (both channels oper- I

ating) into an8 ohm loadovera bandwidthof

20Hz-20

KHzata

rated RMS sum total harmonic distortion of

0.05

% of the fun- I

damental output voltage.

Frequency Response :t.0.ldB 20Hz-20KHz

at

1 watt into 8 ohms;

.t.J.2d8 5Hz-100KHz at 1 watt into 8

ohms

.

..

lKHz

<Power ,

35

watts

RMS

into8

ohms

,perchannel, both channelsoperating, 0.1%total harmonic

distortion.

Harmonic Distortion Less than 0.

001

%from 20Hz-400Hz, and increasing linearly

to

0.05%

at

20KHz at 28

watts

RMS

per channel into 8 ohms.

I.M. Distortion ·

(60Hz-7KHz 4:1)

Slewing

Rate

Damping Factor

Le

ss

than

0.05

%

from

0.01 watts

to

0.25watts,and lessthan0.01%from0.25watts to

28 watts into 8

ohms

per channel.

6voltspermicrosecond (slewing rate is

the

maximum

value

of

the

first

derivativeofthe

output

signal,

or

the

maximum

slope

of

the outp

ut

signal).

Greater than 400,

DC

-400Hz

into

8

ohms

.

Output Impedance Less than

15

milliohms in series with less than 3 microhenries.

Load Impedance

Voltage Gain

Input Sensitivity

Output Signal

Rated for 8 ohm usage; safely drives any load including completely reactive loads.

20.6:t.2%

or

26

.3:t.

0.2

d8

at

maximum gain.

0.75

volts .:2% for

28

watts into 8 ohms.

Unbalanced, dual channel.

I

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I

3

1.2.2 MONAURAL SPECIFICATIONS

Ou

t

put

Power

56

watts

minimum

RMS

into

a 16

ohm

load

over

a

bandwidth

of

20Hz-20KHz at a

rated

RMS

sum

total

harmonic

distortion

of

0.05%

of

the fundamental output

voltage.

Frequency

Response

±.

0.2dB 20Hz-20KHz, 1 watt,

16

ohms.

±.ldB 6Hz-50KHz, 1 watt, 16 ohms.

lKHz

Power

70 watts

RMS

into 16 ohms.

Harmonic Distortion

Less

than 0.001% from 20Hz-400Hz and increasing linearly to 0.05%at20KHz at 56

watts into

16

ohms.

I.M

. Distortion

Less

than 0.05%from 0.01 wattsto0.25watts,and lessthan 0.01%from0.25watts

to56

watts into 16 ohms.

Slewing

Rate

12 volts per microsecond.

Damping Factor Greater than 400,

DC

-400Hz into 16 ohms.

Output Impedan

ce

Less

than 30 milliohms in series with less than 6 microhenries.

Load

Impedance

Rated

for 16 ohm usage, safely drives any load including completely reactive

loads.

Voltage

Gain

41.2±2%or 32.3±.0.2dB at maximum gain.

Input Sensitivity 0.75 volts ±2%for 56 watts into 16 ohms.

Output Signal Balanced, single channel.

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4

1.2.3

GENERAL

SPECIFICATIONS

Hum and Noise

(20Hz-20KHz)

Phase

Response

Input Impedance

Amplifier Output

Protection

Overall Protection

DC

Output Offset

(Shorted Input)

Turn-on

Circuit

Power

Supply

Power

Requirements

Heat Sinking

Chassis

Controls

Connectors

Dimensions

Weight

Finish

106dB below rated output.

+10, -15° 20Hz-20KHz

at

1 watt.

25K ohms

±30

%.

Short, mismatch,and open

circuit

proof.V-1

limiting

isinstantaneouswith

no

annoy-

ing

thumps, cutout, etc.

AC

line fused. Controlled slewing rate voltage amplifiers protect overall amplifier

against

RF

burnouts.

Input

overload protection isfurnished byinternal resistanceat

inputs

of

amp.

10 millivolts

or

less.

Instantaneous, with

minimum

thumps

and no program delay.

Wideband

multiple

feedback loopdesign utilizingone linear

IC

(dual

op

-amp).Total

equivalent

of

40

transistors, 18 signal diodes, 2 zeners, and 4 rectifier diodes.

Special design low profile transformer. Computer grade filter capacitors.

Two

regulated supplies for complete isolation and stability.

Requires 50Hz-400Hz

AC

on 100, 120, 200, 220,

or

240

volts ±10% operation

Draws

15

watts

or

less on idle, 120 watts

at

56

watts total output.

The entire amplifier isused as a heatsink. Frontpanel extrusion acts as a heatsink

along with

the

chassis covers.

Aluminum chassis construction for maximum heat conduction and minimum

weight.

Two

input

level controls on front panel with powerswitch and pil

ot

light. A mono-

stereo switch is located next

to

the

input

jacks on the rear panel.

Input -

1/4

inch phone jack.

Output -Color-coded binding posts with stereo

1/4

inch earphone jack on front

panel.

AC

Line -Three-wire (grounded) male connector on 5 foot

minimum

cable.

17inches long,8¾inchesdeep, and 1

¾ inches high (8 inchesdeepfrommounting

surface). 19 inch standard rack mounting hardware included.

10 pounds net weight

Satinized aluminum front panel with gray suede Lexan insert.

•

I

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I

+l

0

"'"

-1

-2

-3

◄

TO

DC

+5

0

-5

+5

DB 0

-5

+5

0

-5

+20

+10

0

PHASE

SHIFT

-

10

(degrees)

-20

-30

-

40

--

----

~

MIN,

L

10

100

l

I

RE

1)

CY

t,

,J

''

'

''

"

lK

FREQUENCY

(Hz)

I

ES

I>( ~

NOii

Ir

I~

._

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~

t;tc

l'(C.

:SI

••

{pe

..-

C

10

-..,~

-

......

_

41

hm

ph,

I~

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.,

it

:

8 C

hm

ph,

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thif

--

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r

"'

HF

DEi

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1111

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DI~

CLb.~Imi

pf,

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t::,.

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.

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y

...

.

vu

......

-

11

. phase 1

hift

=1 3! l

100

I

lK

FREQUENCY

(Hz)

'n1

Ill

\I l

i>

lw

o 1tpu

(11

pi

iH

delay

lK

FREQUENCY

(Hz)

:al

>I

5

iii;

-

=::::

...........

~

....

Ill,

C:I

l0K

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n;

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1

IJ

I

l0K

,ASE'

RI:

Cl:

1y

level

bekl

w~

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l0K

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16

ohms

8 ohms

4ohms

l00K

40w

30w

20w

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im

Jm

I

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www.SteamPoweredRadio.Com

6 I

.1 I

NOMINAL HARMONIC DISTORTION I

.

01

I

D

ISCLOSU

RE

PROHIBITED I

e

ff

ective Nov. 4,

197

4

.001 I

10

100

lK

lOK

100K

I

FREQUENCY

(Hz) I

I

.1

.

08

I

.

06

INOMINAL INTERMODULATION DISTORTION

.

04

.

02

I

I.M. 0

% I

.

06

TEST

I

.

04

INSTRUMENT

RESIDUAL

0.

001

%

.

02

DISCLOSURE {typ) I

PROHIBITED

0 e

ff

ective Nov. 4, 1

97

4

.

06

I

.

04

.

02

I

.

01

.1 1

10

100 I

POWER

OUTPUT

(Watts) I

Crown D-60 User manual

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