Quadraflex Reference 650FET R Owner's Manual

Referenco:

Owner's

Manual

Referehce: osoFET

R

byQuadraflex

AMIFM

StereoReceiver

TheSoundAnswer.

Referehce: 65oFET

R

by

Quadraflex

AM / FM

StereoReceiver

Cong

ratu

lations !

Your

new Reference: by Quadraflex

650FETR

is the first stereo

receiver to utilize special

MOSFET

power

transistors.

These

advanced

devices

reduce

high frequency distortion

to a fraction

of

that found

in

conventional

receivers. The absence of distortion

at

frequencies far beyond

the range of

hearing

assures

a

purity

and clarity

of sound that

is unprecedented.

lntroduction

Your new Reference:650FETR

has

been engineered

by

Quadraflex

to

provide years

of satisfaction.

Proper

installation,

connection and

use of

its

controls

are essential

for

you

to take

full

advantage

of

its

quality

and

versatility. This manual

is

organized

for

your

rapid understanding and

enjoyment of

your

Reference: 650FETR.

U

n

packi

ng

Carefully

remove the

Reference:650FETR

from

its

carton.

Avoid

lifting by

the AM antenna

mounted on the

rear. lt cannot

support

the

weight

of

the

receiver. Save all styrofoam

packing;

it

is

essential

for

secure

shipping or

moving.

There is also a small

plastic

bag containing

a

light

colored

wire.

This is the FM

antenna

so

don't throw

it

away.

Look on

the rear

panel

of

the

650FETR

and

locate the serial

number.

Make sure it

is marked

on

your

dated

purchase

receipt. Save

this to validate ownership

if

your

Reference:650FETR

ever

requires service or

is stolen.

Placement

Place

your

650FETR

on a sturdy

table or shelf,

leaving enough

space to

get

at

its rear

panel

connections.

You

must

allow

several

inches for

ventilation

and

avoid

putting

it on a

rug that

might impede air circulating

into vent openings on

the bottom.

Keep the 650FETR

away

from direct sunlight

or other sources

of

excessive

heat. Avoid

placing

it where

it might

be

exposed to

rain or

moisture.

Before making connections.

make sure the 65OFE1R

is not

yet

plugged

into the

wall. This

must wait until all connections

are

made.

Speaker Connections

For

the

best

performance

we recommend the use of

1B-gauge

"lamp"

or

"zip"

cord. Use

of thinner

wire will impair

power

transfer

to

your

speakers.

Prepare the speaker

wire

by cutting

two approximately

equal lengths and

running them where they

are safe.

At

each

end separate

the

paired

wire for several

inches

and strip aboul1/t

to

% inch

of

insulation at each end.

You can

do this by slightly

cutting the

insulation with a knife or

razor,

being

careful not to cut

into the wire

strands.

Then

pull

off the

unwanted

insulation. Twist the exposed strands

tightly.

You

should

now examine the

wire closely. One side of the

pair

will

either

have a

ridge

on

its insulation or a different color

wire if

the insulation

is transparent. When

you

connect

your

speakers

make sure

the wire with the

ridge or copper color

goes

to the

positive

terminal, usually

marked

+,

8 ohm, or

positive,

and

the

other

wire to the

negative

terminal

usually marked

-

,

0, or

negative. Make sure each

speaker

is wired

the same

way.

Locate the bottom

row of speaker terminals

marked A.

The

two

left-hand terminals are

for the wires

going

to the

speaker on

yout'

right

(as your

face the front of the receiver).

The two right-hand

terminals are

for the speaker on

your

left

(facing

the

receiver).

Connect

each,

remembering

to

insert the coded

wire into the

+

terminal

marked in red on

your

650FETR.

To make connection,

push

on

the tab below each

terminal, insert the

wire into

the

exposed

hole

and

release the tab. At this

point

inspect

your

connections

to make sure that there are

no strands touching

between

wires

or terminals

either at

your

receiver

or

speakers.

You may connect a second

pair

of speakers to the upper

row

of terminals

marked B. Use the same

procedures.

Your

Reference:650FETR can safely operate

two

pair

of speakers

whose impedance

is

8 ohms or

higher.

lf

either

pair

of speakers

is rated

below

8 ohms, then only

one

pair

may be operated at a

time to avoid overloading

the amplifier section.

Caution:

Never make any speaker connections that

join

two

red speaker

terminals on

your

650FETR.

This willcause serious

damage

and

will not increase

power

output.

lf

you

connect only

one

speaker, use

either the L or R terminal, but

not

both.

Turntable

Connection

Make certain

your

turntable

is equipped

with a high

quality

magnetic cartridge.

The two audio cables

attached to the

turntable

will

have

different

color

plugs

to identify L and

R

channels.

Push the

right channel

plug

firmly into the bottom

jack

(R)

on the 650FETR

marked Phono 7 and

the left channel

plug

into the top

jack

(L).

Make sure

they are

pressed

as

far as

they can

go.

Slight twisting

of the

plug

as

it is being

inserted

may be

required if it

is very tight.

Many turntables

also

have a separate

wire that is for

ground-

ing it to the

receiver. Loosen the

metal nut

marked

Gnd on

the

650FETR,

slip

the end of the

ground

wire

under

it,

and

retighten

the nut.

A

second

turntable can

be connected

to the Phono 2

jacks

and

ground

using

the same

procedure.

The

power

cord

from

the turntable

can be

plugged

directly into

the wall or

into the outlet at

the rear of the 650FETR

marked Un-

switched.

This outlet

is

"live"

whenever the 650FETR

is

plugged

into the

wall.

Antenna Connections

Proper anienna

placement

is essential for

good

FM reception.

In most

areas

the

T-shaped

"folded

dipole"

wire supplied

with

your

650FETR

is

adequate.

lnsert the two bare ends

into the

Antenna terminals

with

the

red tabs marked

300 ohms.

Stretch

out the top section of

the

"T";

you

may find that

you

will have to

reposition it later for optimum

reception. In

difficult

reception

areas

it may be necessary

to

utilize an outdoor antenna

instead.

Your 650FETR can often

"share"

with a TV antenna by using an

inexpensive

antenna

splitter or 2 set-coupler, available

from

your

dealer.

Connections

made from flat wire are made at the

red

terminals. So are

connections

made from the flat wire coming

out

of a

matching

transformer

if

your

antenna

uses rounded

coaxial-type

cable.

You may make direct coaxial cable connections

by separating

the inner wire

from its

surrounding

braided shield wire. The

stripped

inner wire

attaches

to the right

hand red terminal; the

outer braid

is

twisted

firmly

and

inserted in the adjacent black

terminal marked Gnd.

A ferrite bar

AM

antenna

is

attached

to the rear of

your

Reference:650FETR. For adequate

reception

you

must swing

it

away

from the

chassis,

clear of wires and cords.

lt may require

repositioning depending on the direction a

station is broadcasting

from.

Better

reception

of

distant AM stations

is

possible

if

you

connect a single

long wire to the AM antenna terminal.

This wire

should

be 20 to

50

feet in length

and

run mostly horizontally.

Connecting

A

Tape Deck

The Reference:650FETR

has two separate tape

monitor

circuits.

You may connect two tape decks, or one

tape deck to

either circuit.

The line lnputs to

your

tape deck

plug

into either

set of lape

out

jacks

on the

650FETR. The output

jacks

on the

tape deck connect

to the tape rn

jacks

on the 650FETR.

Make

certain

that L and B connections are

consistent

for Tape

Out and

Tape

ln

so channels

are not

reversed from recording to

playback.

A third tape deck

may be used for

playback

only by

connecting

its

output

to the fape 3

jacks

on the 650FETR.

You

may

plug your

tape deck's

power

cord either

directly

into

the

wall

or

into the Swifched

AC

outlet on

vour

Reference:650FETR

Connecting

Other Components

f he Tape ln or

Tape

3

jacks

may be used

with

sources other

than a

tape deck as

long

as

they

have

similar signal

levels. The

audio output of

a television or short

wave tuner are

just

two

possibilities.

You

should

consult

your

dealer

if

you

are

considering

connecting such equipment.

Connection

Summary

At this

point

double-check all

your

connections to

make sure

all

plugs

are

inserted

firmly and speaker

wires do not

have

any

it

I

touching strands at

either end. Make

sure the

power

switch is

in

its

off

position

and

plug

the Reference:650FETR

into a nearby

wall

outlet or

extension cord.

Whenever

you

move

the receiver or change

connections

on

the back

panel

make

certain

the

power

is

switched ofl.

Operating the Reference:650FETR

The front

panel

controls of

your

Reference

receiver

provide

tremendous flexibility when

used together.

Please

read this

section so

that

you

will understand how to

best use them. Before

starting, turn the volume

control counterclockwise to its minimum

oosition.

To

Receive

FM Broadcasts

1.

Set the far left

selector knob

to the FM

oosition.

2.

Set

the Tape

Mon

switch to Source

and the Mode

switch to

Sfereo.

3. Set Bass, Treble,

Presence,

and Balance

knobs

at their

center

(12

o'clock) settings.

4. Push

the

Speaker A button.

5.

Release

the Loudness

and FM Mufe

buttons.

6. Release

the Hl Fll/er

button.

Now

push

the

power

button

and slowly

advance

the Volume

knob. Tune

to the

desired station

until the Tuning

meter is in

its

center

position.

A

quick

check

of

the

stations

you

like

may

indicate

the need to reposition

the FM

antenna.

The

Signal Strength meter

can

be used tp

check the

effectiveness

of antenna

position.

lts needle

should read

steadily

as

far

to the right

as

possible.

With insufficient

signal

strength

readings

you

will not

be

able to receive

clear broadcasts.

When

you

reach

a station

broadcasting in

stereo the red

stereo

indicator

at the

right

side

of the dial scale

will illuminate.

Push

the FM Mute

switch

to reduce

noise

and

"hiss"

between

stations. The

muting

circuit blocks

all signals below

a certain

strength, including

weak

stations. Release

the FM Mute

button to

receive

these broadcasts.

The

Reference:650FETR

incorporates

a soecial MPX Blend

position

on

its

Mode

switch. This effectively

reduces

background

noise on many

broadcasts without

inhibiting

high frequency

response.

lt works

by altering the

separation

characteristics

of

the stereo multiplex

circuit, reducing

its

vulnerability

to noise.

lf

the signal is

still too noisy it may

be necessary

to

set the

Mode

switch to the Mono

position

where

the

650FETR is least

susceptible to noise. Further

experimentation

with

antenna

position

may

also be required

to receive

certain

stations.

To Receive

AM

Broadcasts

The

procedure

is

similar with

several

significant exceptions.

Set the selector knob

to the AM

position.

Tune

stations

so that

the Tuning

meter deflects

to

its

highest rather

than

center

position.

There is no

muting for AM.

Phono Operation

Set the selector

to Phono 1 or

Phono 2 depending on

which

one

you

have

attached

your

turntable

to. Make sure

your

turntable

is located

far

enough away

from

your

speakers

to

prevent

feedback.

Tape Deck Operation-

Playback

The Tape

Mon

switch

normally controls selection

of

playback

for

two decks.

lf

your

deck

is a three-head design

(usually

open-

reel), the

fape

position

allows

you

to

hear the tape deck's output

whether it is in its

record or

playback

mode.

Switching

the fape

Mon

lever

to

its fape 1 or

Tape 2

position

overrides

the

selector

switch

for the sound

you

will

hear. lf no

tape

deck is

attached

to

either the

Tape 1 or Tape

2

position,

no sound

will

be

heard.

Tape

Deck Operation-Recording

Set

the selector

for the source

you

wish to

record. Adjust

recording controls on

your

tape deck according

to the

manufacturer's

instructions.

The recording will

not

be affected

by

the 650FETR's

settings oI

Volume,

Balance, Loudness,

Hi Filter

or any

of the

tone controls.

You can

quickly

check

to see

that the deck

is receiving

the

proper

signal

by switching

the

fape Mon

lever

to

its appropriate

fape

position.

Copying

Tapes

Copying

tapes requires two tape

decks. Your

Reference:650FETR

is

equipped

with special

Dubbing circuits

which allow

decks to copy

from either

one

to the other

independent of

the selector switch.

This means that

you

can

listen to any source

while the decks are copying.

This

is

done by

setting

Ihe Dubbing

switch

in

the

1

>2 position

if

you

wish

to

play

a tape on

Deck 1 and copy

it

on

Deck 2. Use the

2>'l

position

to

reverse the

procedure.

To listen to either deck at any

time use the

fape Mon switch.

Thus

you

have the choice of

listening to the deck

playing,

the deck

recording, or an entirely

separate

source

without interfering with the

recording.

Adjusting Tone

The

Reference:650FETR receiver

has

controls

to

adjust

bass,

treble, and

/oudness compensation.

The bass and treble controls

have

no affect on

the sound in their center

(12

o'clock)

position.

These controls should be set

to taste. There are detents at each

2 dB

increment for easily repeatable settings.

Avoid turning the

bass

all

the way up at

high volume. This may distort the sound

and damage

your

loudspeakers.

The Reference:650FETR

has

an additional

Presence control to

boost or cut critical

midrange frequencies.

lt is

especially

useful

to

isolate a solo

voice,

piano, guitar,

etc. and

make it more

or

less

prominent.

lt

also

helps

adjust to

deficiencies in

your

loudspeakers

or

listening

environment.

Further flexibility

is

provided

by the Turnover

buttons. These

alter the frequencies

which

the

bass and

treble

controls

affect.

The

outer

position

of each

selects

control

over freouencies

closer to the

midrange where

your

ears

are more

sensitive;

making

the effects

of the

bass

and treble

controls more

noticeable.

The

inner

position

selects more

extreme

freouencies

where

your

ears are less

sensitive

and the

effect is more

subtle.

The Loudness

button

activates

a circuit that

slightly

boosts

extreme

bass

and treble frequencies.

Because

your

ears

are

less

sensitive to these

extremes

at

low volumes,

this

circuit

compensates

so

that

you

hear

all the music. Avoid

excessive

bass control

boost when

the Loudness

button is

oushed.

The

Hi Filter reduces

the

high frequency

content

of the sound.

It will

reduce

"hiss"

in

tapes

and broadcasts.

Use only

as

needed.

The

Balance

control

adjusts relative

volurhe

between

the Right

and

Left channels.

Use

it if

you

sit closer to

one speaker

than

the

other so that

the sound

source is

"centered't.

H

ead

phones

This is

the output

for stereo headphones.

Plug

in

your

headphones

for

private

listening;

you

can elect to have

speakers

on

also

if

you

wish. However,

unplug headphones

when

you

aren't using them; high

power

surges could

damage

them.

Overload Indicator

The Reference:650FETR

has

a small red

LED located

next

lo

the

power

button. lt

lights

to

indicate

a short-circuit

or overload

condition

and the sound

shuts

off. This

protects

critical circuit

components

from

damage. lf

the LED lights,

turn

off the

power

and

check all

your

speaker

connections.

Normal

operation

may

be resumed

by waiting

15 seconds

before.turning

power

on again.

Power

Meters

The Reference:650FETR

has

two

unique

9-position LED

power

indicators.

They

enable

you

to relate

the

power

function

of the

amplifier

sections

lo

your

desired listening

level.

The last

section

of these indicators

marked

Clipping

will flash

when

the amplifier

approaches its maximum

undistorted

capacity. lf the last

LED's

stay lit

you

are operating

at or

beyond the timits

of the 650FETR.

This

could cause

sustained

speaker

damage

from

overload.

Tuning

Dial

Loudness

Switch

Hi-Filter

Switch

Power

Switch

AM/FM

Signal

Strength

Meter

FM
Center
Tuning

Meter

Tone

Turnover

Selector

Switches

Tone

Controls

LED

Power

lndicator

I

Tuning

Knob

FN/

Source

Station

Muting

Indicator

Indicator

Switch

Lights

FM

Stereo

lndicator

Speaker Overload

Selectors Indicator

(Do

not

use

as

handle.)

earjnce

I

u",rtr.l rulopnon"

Control

I

Control

Il

Output

rl

Main/Remote

I

I

Source

Selector

AC

Power

Cord

I

Tr na

Dubbing

Switch

I

Mode

Switch

Monitor

Switch

ll

I

Presence

I

Control
Presence
Turnover

Selector

Switch

Unswitched

AC

Outlet

Femote
Speaker
Outputs

I

Main

Speaker

Outputs

Inputs

Deck

2

In

pu

ts

Deck

1

Phono

2 Phono

AM

Inputs

Ground

Antenna

ll

I

Swrtched

Fuse Outlet

Tape

Tape

Tape

| |

Outputs

Outputs

Inputs Phono

1 Antenna

Deck 2

Deck 1

Deck 3 Inputs

Terminals

Block

Diagram

Speaker A

Reminder

Get

into

the

habit

of turning

down the volume control

on

your

Reference:650FETR

when

you

turn

your

system on or

off.

This

eliminates the

possibility

of inadvertently

damaging

your

speakers if the

power

is

switched on with the volume

control

advanced.

Troubleshooting

Usually

problems

that

occur are

not

the fault of

your

Reference receiver

and are easily

cured.

lf

you

cannot solve

a

problem

in

the manner described

below, consult

your

Reference

dealer.
No

sound and the receiver

does

not light

up.

Make

sure the

Reference:650FETR

is

plugged

into a working

AC outlet

or extension cord. Check the AC line fuse

at the back

of the

receiver.

lf the fuse is

blown, replace it

only

with

the same

type.

A larger fuse

will create internal

damage to the

circuit. lf

the new fuse

blows again, consult

your

dealer.

The receiver

lights but

produces

no sound.

Make sure the fape Mon

lever is in

the Source

position.

Speakers switched on.lt

Overload light is

on, switch

power

off,

check all connections

and

wait 15

seconds_ before

turning on.

Make sure there is

adequate ventilation

to

prevent

overheating. lf

light

comes on again,

you

may have

a shorted speaker

or

section

of speaker wire.

No

sound

from

one channel.

Recheck

connections

and Balance control. lf

this occurs

only

with Phono

or a tape deck, switch

the L and R input leads. lf

the

sound then comes out

of

the

other channel,

you

can be certain

the

problem

is with

the source or its

cable and

not

your

receiver.

Poor bass response.

Check speaker

phasing

by switching to mono

and

back to

stereo.

lf

the bass is weaker in

mono, turn

off the

power

and

reverse

the

+ and

-

wires tor

one soeaker

onlv.

ilum sound.

Make sure

audio cable

plugs

are

inserted

firmly

and

that

the

phono ground

wire is

attached to the receiver.

Occasionally

removing

the

ground

wire will

eliminated hum.

Move receiver

away

from TV

set or fluorescent light.

Poor reception

Almost

always

the fault

of the antenna.

Dense urban

and

hilly

areas

present

a

greater

challenge

from

multipath

or

reflected

signals

like

those which cause

"ghosts"

with TV reception.

Your

dealer can

provide

assistance.

Cleaning.

Use a slightly damp cloth. Avoid

use of any

cleaners or

solvents; they might

scratch the

panel

or cloud the

dial

window.

Reference: 650FETR

Performance Data

Amplifier Section:
Power Output: 65

watts continuous

power per

channel

minimum

RMS,

both channels driven

into 8 ohms

with no more than 0.1 %

total

harmonic distortion.

(1

8.13

dBw)

Frequency

Response at

1 watt: 5-65,000

Hz t .5 dB

Total Harmonic

Distortion at

1 watt: .01 %

lM Distortion al

1 watt: .02%

Crosstalk

at 1 kHz:

-

60 dB

Output

Type: MOSFET

Preamplif ier Section:

Signal-toNoise

Ratio: Phono

1,2 80 dB;

Tape Mon 1,2 85 dB;

Tape

3 85

dB

lnput

Sensitivity:

Phono 1

,2

2.0 mV; Tape

Mon 1 , 2 160 mV;

Tape 3

160

mV

Phono Overload: 200

mV

RIAA Equalization:

t

.25

dB

Tone Control

Range: Bass

t 10 dB

at

50 Hz

with 150 Hz turnover

t

10

dB at

100 Hz with 300

Hz turnover

Treble t 10 dB at 20 kHz

with 6 kHz turnover

t

10

dB at 10 kHz with 3 kHz turnover

Presence t 6 dB at 800

Hz or

'l

.5'kHz turnover

Loudness

Contour

(at

-30

dB):

+8

dB at

100 Hz;

+6

dB at 20

kHz

.High

Filter: - 3 dB at

10 kHz

FM Section:
IHF Sensitivity:

for 30 dB

quieting:

mono 1.79V

(9.8

dB0; stereo

a.2pV

(17.7

dBf)

for 50 dB

quieting:

mono 2.69V

(1

3.5

dBf); stereo 34gV

(35.9

dBf)

Channel

Seoaration at

1 kHz: without

MPX Blend 44 dB;

with MPX Blend 24

dB

.

THD:

mono .1

o/o;

stereo .15%

Signal-to-Noise

Ratio: 72 dB

Capture

Ratio: 1 dB

Alternate Channel Selectivity:

72 dB

lF

Response Ratio: 95 dB

lmage

Rejection Ratio: 60 dB

Muting Threshold: 8

gV

(23.3

dBf)

AM Section:
IHF Sensitivity:

200

gvlm
THD: .50/o
Signal-to'Noise

Ratio: 50

dB

lmage Rejection Ratio: 50 dB

Reference: by

Quadraflex

Limited Warranty

Your Beference: by Quadraflex

receiver is

covered by a

limited

warranty against defects

in materials

and

workmanship for

a

period

of two

years

from

the

date of

purchase.

Reference warranty repair will be

performed

only

when

your purchase

receipt is shown

as

proof

of

ownership. Defective

parts

will

be

repaired

or

replaced without

charge

if

this Reference receiver is returned to

your

dealer's store, as shown on

your purchase

receipt,

or to any branch of

that

store

where, in

all cases,

authorized service will be available. Check the

yellow pages

or white

pages

of

your

telephone directory for the location nearest

you.

lf

additional assistance

is reouired.

olease

write

to

Reference

at the address

provided

below describing the

malfunction. Reference will

send directions

in writing.

Charges

for

unauthorized service and transportation costs are

not

reimbursable under this

warranty. Any

damage or defect

resulting trom

unauthorized

parts

or services is not covered by this wananty. Any

services

performed

by other than a dealer authorized to

perform

such

services are not reimbursable under this warranty.

This warranty

becomes

void if the

serial

number is

defaced or

removed,

or the

product

has

been damaged by alteration, misuse, accident or
neglect. THE WARRANTOF ASSUMES NO LIABILITY FOR PROPERTY
DAMAGE OR

ANY

ATHER

INCIDENTAL

OR CONSEOUENTIAL

DAMAGE

WHATSOEVER

WHICH MAY RESUTT FROM THE FAILURE

OF

THIS
PRODUCT. Any and all warranties ot MERCHANTABILITY and ot
F/INESS implied by

law

are

limited

to the duration of this expressed

limited warranty.

Some states

do not

allow

limitations

on

how long

an

implied warranty

lasts,

so the above

limitations may not

apply to

you.

Some states do

not

allow the exclusiori or

limitation

of incidental or consequential damages,

so the

above

limitation

or

exclusion may not

apply

to

you.

This warranty

gives you

specific

legal rights

and

you

may

also

have

other

rights which vary from

state to state.

Service

Manager
Reference: by Quadraflex
CBS

Inc.
1 301 65th Street
Emeryville, California 94608

Referehce:

by

Quadraflex

CBS

Inc.

1301

65th Street

Emeryville, California 94608

Printed in

USA

,.-

1978