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Technics
Stereo Graphic Equalizer

sH-8o45
OPERATING INSTR UCT IONS

Also available in silver.

$
*tlililht+
Before operating this unit, please read these instructions completely.

9.oo 9t*"- %ot"
We want to thank you for selecting this product and

to welcome you to the growing family of satisfied
Technics product owners around the world. We feel certain you will get maximum enjoyment

from this new addition to your home. Please read these operating instructions carefully, and be sure to keep them handy for convenient reference.

OACCESSOR|ES.
.MAINTENANCE OF EXTERNAL SURFACES

.....
.....

1 1

OBEFORE USING THIS UNIT ........ 1 .FOR UNITED KINGDOM ..... 1 OFOR SAFE USE OF THIS UNrr ......2 OSTEREO SYSTEM COMPONENTS AND THEIR

.

CoNNECT|ONS....

.........3

Use a minus (-) screwdriver to set the voltage selector (on the rear panel) to the voltage setting for the area in which the unit will be used. Note that this unit will be seriously damaged if this setting is not made correctly. (There is no voltage selector for some countries; the correbt voltage is already set.) (Not for Australia)

OFRONT PANEL CONTROLS AND THEIR FUNCTIONS THE SH-8045 FUNCTTONS ..... .TROUBLESHOOTING GUIDE

.oPERATION.. ... ........... s .EXAMPLES OF APPLICATIONS UTILIZING

....... -... 6 ......7 .TECHNICAL SPECIFICATIONS .....7 OTOTAL FREOUENCY RESPONS ...... ....7
lmportant
THE WIRES IN THIS MAINS LEAD ARE COLOURED IN AC.
CORDANCE WITH THE FOLLOWING CODEBLUE: NEUTRAL BROWN: LIVE As the colours of the wires in the mains lead of this unit may not

Connection cords (shielded cable)

correspond with the coloured markings identifying the terminals in your plug, proceed as follows. The wire which is coloured BLUE must be connected to lhe terminal which is marked with the letter N or coloured BLACK. The wire which is coloured BROWN must be connected to the terminal which is marked with the letter L or coloured RED.

To clean, use a soft dry cloth. lf the surfaces are extremely dirty, use a soft cloth, dipped into a soap and water or a weak detergent solution. Wring the cloth well before wiping the unit. Wipe once again with a soft dry cloth. Never use alcohol, paint thinner, or benzine, nor a chemically treated cloth to clean this unit. Such chemicals may mar the finish of your unit.

t

I Use a standard electrical AC wall outlet 1. Use from an AC power source of high voltage, such as
lor air conditaoners, is very dangerous. Be extremely careful not to make a connection to the
electrical outlet for a large air conditioner or central-heating

I

lf water is spilled on the unit

Be extremely careful if water is spilled on the unit, because a fire or serious electric shock might occur. lmmediately disconnect the power cord plug, and consult with your dealer.

E

unit which uses high voltage, because there is

the

possibility of fire.

2.

A DC powersourcecannot be used. Be sure to check the power source carefully, especially on a ship or other place where DC is used.

I

Place the unit where it will be well ventilated, and away trom direct sunlight

Place this unit at least 10 cm (4") away from wall surfaces, etc., and away from direct sunlight.

I Connection and removal of the power cord plug 1. Wet hands are dangerous.
A dangerous electric shock may result if the plug is touched by wet hands.

2. Don't pull the power cord.
Always grasp the plug; never pull the cord itself
.

Keep the unit away from stoves, etc. Heat can damage the external surfaces as well as internal
circuits and components.

I

I Never attempt to repair or reconstructthis unit A serious electric shock might occur if this unit is repaired,
disassembled or reconstructed by unauthorized persons, or if the internal parts are accidently touched.

I

Avoid spray-type insecticides

lnsecticides might cause cracks or "cloudiness" in the cabinet and plastic parts of this unit. The gas used in such sprays might, moreover, be ignited suddenly.

I

For families with children

Never permit children to put anything, especially metal, inside this unit. A serious electric shock or malfunction could occur if articles such as coins, needles, screwdrivers, etc. are inserted through the ventilation holes, etc. of this unit.

I I

Never use alcohol or paint thinner

These and similar chemicals should never be used, because they may damage the finish.

Turn olf alter use

lf the unit is left for a long time with the power on, this will not only shorten its useful operation life, but may also cause other unexpected trouble.

I lf trouble occurs lf, during operation, the sound is interrupted or indicators no longer illuminate, or if abnormal odor or smoke is detected,
immediately disconnect the power cord plug, and contact your dealer or an Authorized Service Center.

-2-

I

Connection to the TAPE terminals of an integrated amplifier

I

Connection to the TAPE terminals of preamplifier

a

Corrected signals from a turntable, tuner, or "tapedeck 2"
connected to an integrated amplifier can be played back, and corrected signals can be recorded by "tapedeck 1 " connected to the equalizer. Playback signals from "tapedeck '1 " connected to the equalize( can also be corrected for listening.

The signals from a turntable, tuner, or "tapedeck 2" connected to a preamplifier can be corrected, and corrected signals can be recorded by ''tapedeck 1 " connected to the equalizer. Playback signals from "tapedeck 1 " connected to the

equalizer can also be corrected for listening.

Open-reel deck Open-reel deck
(tape deck 2) Record player Record player Stereo tuner (tape deck 2)

Recording output terminals (REC OUT) or external output terminals (EXT OUT) Playback terminals (PLAYBACK) or external input terminals (EXT lN)

sH-8045

Cassette tape deck (tape deck 1 )

Cassette tape deck (tape deck 1 )

-3-

Power switch

Equalization switch Tape-monitor selector
Equal ization-position selector

Variable-ran ge selector

Left channel Band-level control

Variable-range

indicators

O Power switch (power)
This switch can be used to turn the power on and off
.

^ rec out: Set to this position in order to make a tape recording of a
radio broadcast or a disc while controlling the frequency
response. Also, compensated playback sound can be heard at this position.

@

Equalization switch (EQ)
This switch can be used to turn the equalization circuitry on and off.

Note:
The equalization switch @ must be set to the controlled.

"on"

(f--)

position, otherwise the frequency response cannot be

r

on:

Set to this position for equalizer correction.

loff:

Set to this position to turn off equalizer correction. By turning this switch on and off , the equalizer effect can also be checked. When this switch is in the "off" (r-t) position, signals will still pass through the unit and be emitted' regardless of whether the power switch O is in the "on" or "off " position.
.Refer to page 5.

@ Variable-range selector (variable range) .l. +12 dB: Set to this positioh to correct comparatively large disturbances in characteristics, such as those which occur in a
listening room or in speaker systems.

r +3 dB: Set to this position to correct comparatively small disturbances in characteristics, such as those related to cartridges, etc.

o

I source: Set to this position to listen to the radio or a disc. r tape:
Set to this position to listen to a tape deck.

Tape-monitor selector (tape monitor)

@ Band-level controls
These levers are used to adiust the 1 2 frequency levels that result from dividing the 16 Hz-32 kHz frequency range into 12. Using 1 kHz as a reference point, they are arranged in raising and lowering intervals of 1 octave each. When these levers are moved in the "+ dB" direction, peak frequency characteristics are obtained. When they are

"on" position, the frequency response of the radio, disc and tape deck can be controlled.
I

Note: lf the equalization-position selector@ is settothe "source" (-^I) position and the equalization switch @ is set to the

(l-r)

moved in the

"-

dB" direction, dip frequency charac-

teristics are obtained. These characteristics can be emphasized or attenuated a maximum of 12 dB.

o
I

lsource:

Equalization-position selector (EQ position) O Variable-range indicators

Set to this position to record without equalizer correction'

When the variable range selector @ is set to the " + 1 2 dB' ' ) position, this indicator illuminates in yellow. When

the selector is set to the "+3 dB"
indicator illuminates in orange.

(^-f

(r-r)

position, this

:***S*-

B
0

dB (center position.)

Select correction amount (+ 12 dB/+3 dB)
@

Adjust tone quality as desired.

Prepare the amplitier oSet the loudness switch to the "off " position. oSet the bass and the treble controls to the center ("def eat") position

.Adiust the volume level by using the volume control.

O source
@

(r^I)or (^-l

rec out

(.f^

source

@on

(l

To listen to uncorrected sound, set the equalization switch to the "off " (^^f ) position.

O rec out

(r-(^^f)
ortape

@

source

(l*

@on

To record uncorrected sound, set the equalization switch to the "of f " (-^l. ) position.

1r-

CD

source

(r^l

@

tape(l-To listen to uncorrected sound, setthe equalization

@on(r.^r.)
switch to the "off "

(r.^f

) position.

izer effect
The equalizer effect can be checked by turning the equalizer
switch on and off and comparing the corrected and uncorrected soud.

Notes:

.The power switch of the equalizer may be set to the "off"
position when listening without equalizer correction. lf this is done, set the equalizer on/off switch to the "off" (^^f) position also. .lf you use any switches other than the tape-monitor selector while recording, the sound may be interrupted.

The sound level of the 12 frequency divisions in the 16 Hz-32 kHz frequency range can be easily and selectively corrected by
means of the band level control of this unit. 1. Complete audio room correction-including the correction of both stereo equipment and room acoustics. 2. Personalized sound quality control. 3. Creating an original tape collection of tapes tailored to your car stereo, or tapes of live recordings, etc. 4. Reduction of noise, prevention of howling. These are merely a few of the possibilities that sound quality and room acoustic correction open up for the serious listener.

Tapes can be made exclusively for the listening conditions inside a vehicle. Merely raise the 63 Hz level 3-4 dB and completely cut the levels below 31 .5 Hz that are so troublesome for car stereo reproduction. For medium and low frequencies, centering on the 250 Hz vicinity, lower the
modulating
dB.
ef

I

Making tapes for car stereos

fect by raising the 4 kHz-8 kHz vicinity by

2-4

Each room has its own particular effects on f requency characteristics. These effects are determined by a number of conditions, such as room size, furnishings, etc. fhe 12 separate divisions of the band level control on the

f

Correcting room acoustics

f

Adding some power to disco music

SH-8045 make it possible to selectively correct only the frequency ranges necessary to suit the conditions of each listening room.

First of all, completely cut the level of sounds below 31 .5 Hz. These generally have no effect unless they are coming through very large speakers. Then, increase the power of bass guitars
and bass drums by raising the level of the 63 Hz-125 Hz range, and raise the level of sounds from 4 kHz to '16 kHz. The result will be greatly emphasized low frequency sounds and strong, clear high frequency sounds.

An example of room acoustics correction
ln order to correct the peaks and dips in bass sounds caused by

reflection, reduce the 250 Hz level

4*6 dB and then, rise the level of sounds below 63 Hz and above 4 kHz vicinity slightly.

I

Cutting noise from discs

Live tapes recorded outdoors generally contain popping noises caused by wind and various other noises from the surrounding area. ln order to effectively eliminate wind noise' cut bass sounds below 63 Hz and raise the level of sounds in the 250 Hz-500 Hz range. Then control sounds made by birds, etc'' with a 4 kHz and or 8 kHz adjustment.

I

Cutting the noise lrom live recording tapes

Noises from warped discs are low frequency noise components. Lowering the sound level of the 63 Hz vicinity can eliminate these. As for cutting the noise trom old discs, all band level control levers should first be set to their exact mid-position (flattening the equalizer ef fect) and then lowered one by one to the " - 1 2 dB" position, listening to the effect of each adjustment. The noise components can thus be found and cut without
deteriorating the sound quality.

I

Reducing tape hiss

Tape hiss can be effectively reduced by slightty raising the level of high lrequency (above 2 kHz) sounds during tape deck
For female vocals, raise the level of the 1 kHz-2 kHz range by 2-4 dB. To rectify omission, raise the level of the 4 kHz vicinity slightly. Male vocals can be improved by raising the level of the 500

t

Producing clear vocals

recording, and then lowering them during playback.

Note: lf sounds above 8 kHz are raised too much, distortion may result in the tape deck. Prevent this by watching the level meters of the tape deck and setting the recording levels
appropriately.

Hz-2kHzrange.
Below is an example of a lemale vocal correction'

recording

playback

---.-<.!!*.*.,..-..4.4

Before requesting service for this unit, check this table to determine if the problem can be solved as described below. lf the problem still persists after making these checks, or if there are symptoms of malfunction not described in this table, it is rec-

ommended that you consull the store where this unit was pur-

chased or your local Service Center (see list included) for
f

urther information and assistance.

Probl6m
o

P,robable,r'e.ause{s} lncorrect connection.

$uggested rernedy
.Refer to page 3.
oTurn the powerswitch off (l^t) and, to use the stereo system, set the on/off switch of the equalizer also to the "off" (^-f) position.

llor$6und

oThe power switch is in the "off " (--f) position and the on/off switch of the equalizer is set to the "on" (.l'..^) position. oThe equalizer switch is set to the "off (^-I) position.

"

eof'te'etiorr

posslbls.ttecgtdillg

isnst

,,

oSet the equalizer switch to the "on" position.

(I-^)

rThe equalizer-position selector is set to the "source" (^-.l. ) Position.
oThe equalizer-position selector is set to the "rec out" (f-.r.) Position.

oSet the equalizer-position selector to the "rec out" (t^r) position.
oSet the equalizer position switch to the "source" ) position at all times other than when making corrections during recording.

G6nGtrlp',ais.no'Lr, :,

PodA&,et:,FltY!,ict

(^-f

(DrN 45 500)
Frequency response (center position) Marimum output voltage Rated output voltage Rated total harmonic :5 Hz-100 kHz, -1 dB

Frequency response (+12 dB position)

:

8 V (1 kHz, THD 0.01%)

:1V
:0.005% (2OHz-2AkHz) 0.003% (1 kHz)

distortion
Input sensativity

:1V
: 100 dB (1 10 dB, IHF' A)

Signal-to-noise ratio Maximum input
voltage
I

:8 V (1 kHz)
:47 kQ

lnput impedance
Gain

rl
;

:0+1 dB
: +0.5 dB

Channel balance
250 Hz-6300 Hz Channel separation 1 kHz Band level controls

Frequency (Hz)

i l

:70 dB
1

I
ll

Center frequency

dB, +3 dB--3 dB elements continuously variable per channel) : 16 Hz, 31 .5 Hz, 63H2,125 Hz, 250 Hz, 500 Hz, 1 kHz, 2 kHz, 4kHz,8 kHz, 16 kHz,32kHz

+12d8--12

(1 2

GENERAL Power supply
Power consumption

:

AC 110 V/120V/22OV/240V, 50 Hzl60 Hz. AC 240 V 50 Hz only (For Australia)

: t9W

Dimensions

(HxWxD)
:1

:53x430x235 mm
(2-3 / 32" x
1

6-29 / 32" x

9

-1 / 4" )

Weight

:2.6 kg (5,7Ib)

il

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