Akai AM-M939 User manual

oRte Milli
-AKAI-01083
DIGITAL INTEGRATED AMPLIFIER
psd atetiiyal 1~17
Francais 19~35
i 37-53
Pagina 55-~71
Pagina 73~89
1033
Nay

This is the Akai
Digital Integrated
Amplifier
Use the Akai amplifier in combination with the
other components in the Akai Midi-series and you
-will have an excellent hi-fi system.
Features
@ Dual pole DC servo power amplifier with open
loop circuit
® Optical and coaxial digital interface connection
system for CD player and DAT deck (Page 3, 13)
@ 2 times over sampling digital filter incorporating
D/A converter for compact disc and DAT
cassette playback
Microcomputer controlled function controls
Motor driven volume control
DIRECT OPERATION switch (Page 7, 14)
REC MODE SELECTOR switch (Page 10, 11)
14)
2-sets of speaker connections (Page 7, 15)
Exclusive processor input and output jacks and
graphic equalizer recording jacks (Page 1 2)
e Electronic speaker protection system with
muting circuit (Page 15)
@ Loudness switch and subsonic switch (Page 1 4)
®@ Remote control function (Page 4)
Table of contents
Warning 's3:sis5viccetuty tected alee eusee 1
What you should know to protect yourself....... 2
Before using the Akai amplifier ................. 3
PIACEMENL. oo ob dtc tien wsleeenloe ape irons 3
On the Akai CD player connection ............ 3
On the wireless remote control unit.......... wee 4
Making the right connections...... Seales a eiel vine 5—6
GCOntrolSs. co 5 iwc suet tee aie ewe ewe Setar 7
Let’s enjoy muSIC............. 0. cece eee ee eee 8-9
L6USTOCOM i. hu Ri sed odes ning See ede 28 a 10
Tape dubbing.............. 0c cece eee eee eee 11
Expanding Your Hi-Fisystem ............ 12-13
Graphic equalizer and turntable connections. 12
DAT deck connections............... ae 13
Operation details.................00----- 14-15
Protection circuit............ 0... cece eee eee 15
The speaker system...........0...0 eee eee 15
Problem? Let’s check ............0000eeeeeeee 16
Specifications .17
Super bass, bass and treble tone controls (Page
WARNING .
To prevent fire or shock hazard, do not
expose this appliance to rain or moisture.
Power requirements
Power requirements for electrical equipment differ
from area to area.
Please ensure that your machine meets the power
requirements in your area.
If in doubt, consult a qualified electrician.
220 V, 50 Hz for Europe except UK
240 V, 50 Hz for UK and Australia

What
you
should
know
to
protect
yourself
_
Watch
out!
You
might
get
an
electric
shock
@
Never
touch
the
plug
with
wet
hands.
@
Always
pull
out
by
the
plug
and
never
the
cord.
@
Only
let
a
qualified
professional
repair
or
reassemble
the
Akai
Amplifier.
An
unauthorized
person
might
touch
the
internal
parts
and
re-
ceive
a
serious
electric
shock.
e@
Never
allow
a
child
to
put
anything,
especially
metal,
into
the
Akai
Amplifier.
Let’s
protect
the
Akai
Amplifier
too.
@
Use
only
a
household
AC
power
source.
Never
use
a
DC
power
source.
@
Make
sure
that
the
power
consumption
of
each
component
does
not
exceed
the
wattage
speci-
fied
on
the
rear
panel.
e
|f
water
is
spilled
on
the
Akai
Amplifier,
discon-
nect
it
and
call
your
dealer.
@
Make
sure
that
the
Akai
Amplifier
is
well
ventilat-
ed
and
away
from
direct
sunlight.
Be
careful
not
to
block
the
side
ventilator
of
the
Akai
Amplifier.
@
To
avoid
damages
to
the
internal
circuits
and
the
external
surface,
keep
away
from
heat
(stoves,
etc.)
@
Avoid
using
spray
type
insecticide
near
the
Akai
_
Amplifier.
It
can
damage
the
finish
and
might
ignite
suddenly.
@
To
avoid
damaging
the
finish,
never
use
alcohol,
paint
thinner
or
other
similar
chemicals
to
clean
the
Akai
Amplifier.
@
Place
the
Akai
Amplifier
on
a
flat
and
solid
surface.
©
If
you
don’t
plan
to
use
the
Akai
Amplifier
for
a
long
period
of
time,
disconnect
the
power
cord.
To
enjoy
the
Akai
Amplifier
for
a
long
time,
please
read
this
operator's
manual
thoroughly.

3 Before using the Akai Amplifier
Placement
Stack the Akai Midi series components as shown
in the illustration.
If you wish to change this order, always make sure
that there is another component separating the
amplifier and cassette deck. The tuner and CD
player should also have another component be-
tweenthem. —
When installing the components
Use an audio rack which has heat radiation holes.
eee
Seooggoua|s]—[ .. [2 |
Interference —
This amplifier has a D/A converter for CD and DAT
cassette playback. If there is any interference
during TV reception , turn OFF the power switch of
the amplifier if you are not using it.
Notes for connection and optical
terminals
® Connect the plug firmly, with it’s printed face up.
@ When connecting and disconnecting the cable,
pull by the plug not the cable.
@ Keep the plug and inside of the terminals clean.
Do not scratch the top of the cable.
@ Replace the terminal caps when the terminals
are not in use. ‘
@ Do not bend the cable.
® If you are winding the cable, loops with a 15 cm
diameter or more are recommended.
On the Akai CD player connection
Use the optical fiber cable provided with the CD
player for connections
Before connecting
@ Turn off all the components.
@ Remove the terminal caps from the CD OPTICAL
terminal of the Akai amplifier and the DIGITAL
OUT OPTICAL terminal of the Akai CD player.
@ Do not loose these terminal caps. The terminal
caps will protect these optical terminals from
dust.
@ Do not make connections to OPTICAL terminals,
COAXIAL jacks and the CD (L/R) PIN-jacks at
the same time. This will result in the OPTICAL
and COAXIAL input signals being cut
automatically.
Optical fiber cable (included with the CD player)
Printed face Insert
Optical fiber cable

On
the
wireless
remote
control
unit
The
wireless
remote
control
unit
can
be
used
to
control
all
the
operations
on
the
following
Akai
Midi
series
components:
Tuner operating buttons
TAPE deck operating buttons
WIRELESS
TE CONTROL
RC-S930
AKAI
Loading the batteries |
> Push the release lever while pulling the bat-
tery
compartment
cover
to
open.
e
2)
insert
two
1.5
V
(R6,
AA
SUM-3
or
equivalent
size)
dry
batteries,
according
to
the
polarity
.
guides.
3]
Replace
the
cover.
e
e
e
e
AT-M739/L
Tuner,
AM-M939
Amplifier,
CD-M939
CD
player
and
GX-M959W
Cassette
deck.
Transmitting window
Amplifier operating buttons
CD player operating buttons
Notes
on
the
remote
control
operation
and
batteries
Please
read
the
information
printed
on
the
dry
batteries.
Do
not
use
the
remote
contro!
unit
near
fluores-
cent
lamps
which
may
shorten
the
operation
range
of
the
remote
control
unit.
As
the
strength
of
the
remote
control
unit's
bat-
teries
become
depleted,
the
operation
range
of
the
remote
control
will
become
shorter.
In
this
case,
the
batteries
should
be
replaced
with
new
ones.
If
you
aren’t
planning
to
use
the
remote
control
unit
for
a
long
period
of
time,
take
the
batteries
out.
When
replacing
the
batteries,
always
clean
all
the
terminals
with
a
dry
cloth
and
replace
both
batteries
at
the
same
time.
Do
not
use
any
batteries
other
than
those
recommended.

Making the right connections
Before connecting
@
Turn
off
all
the
components
before
connecting.
® Connect the power cord last.
@
Make
sure
that
you
connect
the
white
PIN-plug
to
the
left
(white)
jack
and
the
red
PIN-plug
to
the
right
(red)
jack.
@
Connect
everything
securely.
Loose
connec-
tions
can
lead
to
distortion.
@ To prevent damage to the cords, connect and
disconnect
by
holding
the
plug
and
not
the
cord.
@
Make
sure
that
the
power
cords
and
the
connec-
tion
cords
do
not.get
tangled
with
each
other.
This
can
lead
to
distortion.
@
if
your
turntable
has
a
ground
wire,
connect
it
to
the
Akai
amplifier’s
ground
terminal
(7}7)
securely.
AUX/DAT REC and PLAY jacks
These
are
auxiliary
jacks.
Connect
such
compo-
nents
as
a
2nd
DAT
deck
or
cassette
deck
to
these
jacks.
CD and DAT PIN-jacks
Connect the CD player and the DAT deck to these
jacks
with
the
conventional
PIN-plug
cords.
When
these
jacks
are
being
used,
the
CD
and
DAT
OPTI-
CAL terminals and COAXIAL jacks are cut auto-
matically.
*
For
digital
interface
connection
use
the
OPTI-
CAL terminals or COAXIAL jacks.
PHONO and PROCESSOR jacks
Connect
the
Akai
turntable
to
the
PHONO
jacks
of
the Akai amplifier.
Connect
the
Akai
graphic
equalizer
or
surround
processor
to
the
PROCESSOR
jacks
of
the
Akai
amplifier.
* Refer to the operator’s manual of the turntable
and the graphic equalizer, etc..
Ground terminals
If your turntable has a ground wire, connect it to
this terminal securely.
AM loop antenr
FM Antenna
Right channel
speaker system

Tuner
CD player
SYNCHRO CORD
Cassette Deck
LINE OUT
Important!
The
illustrated
power
plugs
are
intended
for
general
reference.
The
power
plug
used
in
your
country
may
differ
from
the
illustration.
(Exam-
ple: U.K., Australia, U.S.A., Europe etc.)
To household AC outlet
A SPEAKER L
©
O pity
Left channel
speaker system
SPEAKERS terminals
Be sure to connect the:
+ wires to the + terminals (red);
— wires to the — terminals (black);
Left
speaker
to
the
Left
(L)
terminals;
and
Right
speaker
to
the
Right
(R)
terminals.
How to connect the speakers
Strip off a 1cm length of vinyl covering from
the end of the speaker cord.
Loosen the Red and Black speaker terminals
by turning them counter-clockwise. (These
terminals cannot be removed.)
0
Q
8
Twist
the
speaker
wires
firmly,
then
insert
them
through
the
opening
of
the
speaker
terminals
guards.
4) Turn the terminals clockwise to securely
fasten the cords.
IMPORTANT: Do not cross connect speaker sys-
tems. Use either the A terminals or B terminals for a
pair of speakers. Do not connect one speaker to an
A terminal and the other to a B terminal.
On the required speaker impedance
When using one pair of speakers:
Turn one of the A or B SPEAKERS switches to
on. Connect speakers of 6 to 16 ohms imped-
ance. :
When using two pairs of speakers:
Turn both the A and B SPEAKERS switches to
on. Connect speakers of 12 to 16 ohms imped-
ance.
Refer to the markings on the amplifier’s rear panel.
Power cord
Connect this cord to the Akai tuner’s SWITCHED
AC OUTLET or directly to a household AC outlet.
On the PROCESSOR IN/OUT and G.E. REC jacks
This Akai amplifier is equipped with special PROC-
ESSOR jacks for connection to a graphic equalizer
or audio processor.
Remove the pins of these jacks only when connect-
ing one of these accessories and keep them ina
safe place. Do not lose these pins. Refer to page
12.
DIGITAL OUT COAXIAL jack
Connect the DAT deck’s DIGITAL INPUT jacks or a
D/A converter which has a digital interface circuit.
Connection can be made with a coaxial PIN-piug
cord such as a video connection cabie available in
most Hi-Fi stores. Refer to page 1 3.

7 Controls
9 @¢000 ©
t
POWER Indicator
Indicates the power is turned on. Also indi-
cates the speaker protection circuit opera-
tion. When the speaker protection system is
engaged, the indicator will be red.
POWER Switch
To turn the Akai amplifier on and off.
Remote control receiver
For remote control operation.
BALANCE Control
To adjust the left and right channel! balance.
A/B SPEAKERS Switches and Indicators
To select the speaker system.
DIRECT OPERATION Switch
To select the playback operation mode of the
Akai amplifier.
SAMPLING FREQUENCY Displays (44
kHz/48 kHz)
Shows which digital input signal has been
selected when using the digital interface con-
‘nections.
44 kHz: CD player’s signal is selected.
48 kHz: DAT deck’s signal is selected.
@ @@82@6606 ©
VOLUME (—dB: minus decibel) Control
To adjust the volume level. The O dB (zero
decibel) position is the maximum volume of
the amplifier..
MUTING Switch and Indicator
To reduce volume instantly during playback
without using the VOLUME control.
SUBSONIC Switch (ON = /OFF = )
To turn the subsonic filter on and off.
LOUDNESS Switch (ON — /OFF ™ )
For instant compensation of tone setting at
low volume.
Input select buttons and Indicators
To select the playback source you want to
listen to.
REC MODE SELECTOR Switch (PROCES-
SOR/OFF/SOURCE/DIGITAL)
For recording operation.
ror controls (SUPER BASS/BASS/TRE-
BLE
To adjust the super bass note (super bass),
bass note (bass) and high note (treble) levels.
Headphones (PHONES) jack
For headphone listening.

Let’s
Enjoy
Music
Set
the
following
controls
before
~
VOLUME
control
.
Minimum
(—
oo)
turning
on
the
power
of
your
BALANCE
control
Center
amplifier
REC
MODE
SELECTOR
LOUDNESS switch
SUBSONIC switch
Tone controls
Basic Operation for digital source
playback
Use
the
optical
or
coaxial
cables
to
connect
the
CD
player
or
the
DAT
cassette
deck
to
the
Akai
ampli-
fier.
For compact disc and DAT cassette
playback
Depress the POWER switch to turn on the
power.
Select
the
speaker
system
for
playback
with
the
A
and
B
SPEAKERS
switches.
Press
the
appropriate
button
according
to
how
the
speaker
system
is
connected.
Set
the
DIRECT
OPERATION
switch
to
DIGI-
TAL.
Press the CD or the DAT button, depending
on
which
source
you
want
to
listen
to,
as
fol-
lows:
Press the CD button for compact disc play-
back.
The 44 kHz display wiil light.
Press the DAT button for DAT cassette play-
back.
The 48 kHz display will light.
Playback a compact disc.
Adjust the VOLUME control to suit your taste.
Note
When the DIRECT OPERATION switch is set to
DIGITAL, the tone controls and balance control are
ineffective.

Basic Operation for digital source playback
Depress the POWER switch to turn on the
power.
Notes
@ When the DIRECT OPERATION switch is set to
SOURCE,
the
tone
controls
and
balance
control
are ineffective. :
@ When using the optional graphic equalizer, set
the DIRECT OPERATION switch to OFF.
Select
the
speaker
system
for
playback
with
the
A
and
B
SPEAKERS
switches.
:
Press
the
appropriate
button
according
to
how
the
speaker
system
is
connected.
Set
the
DIRECT
OPERATION
switch
to.
SOURCE.
Press
the
input
select
button
of
the
source
you
want
to
listen
to
as
follows:
For
compact
disc
playback
Press the CD button.
For DAT cassette playback
Press the DAT button.
For record playback
Press the PHONO button.
For cassette playback
Press the TAPE button.
For radio listening
Press the TUNER button.
For auxiliary source playback
Press the AUX button.
Playback a compact disc.
Adjust
the
VOLUME
control
to
suit
your
taste.

Let’s Record
REC
MODE
SELECTOR
Use
the
REC
MODE
OFF
source
SELECTOR
switch
and
NN
DIGAL
the
input
select
buttons
‘
for
recording
operations.
Normally
set
to
OFF
when
not
recording.
PROCESSOR
Ay
Normal recording operation
Digital recording operation
This operation uses the digital interface circuit.
Notes for recording operation.
e
\f
you
want
to
adjust
the
tone
controls
and
bal-
ance
control,
set
the
DIRECT
OPERATION
switch
to
OFF.
before
recording.
Recorded
sig-
nals
will
not
be
affected
by
these
adjustments.
@
Do
not
touch
the
input
select
button
or
REC
MODE
SELECTOR
switch
during
recording.
This
will
interfere
with
the
recording
operation.
@
When
the
REC
MODE
SELECTOR
switch
is
set
to
DIGITAL,
the
cassette
deck
will
not
record.
Before recording
Turn on all the components.
If
you
want
to
make
a
copy
directly
from
an
origi-
nal
cassette:
Use
the
dubbing
function
of
the
Akai
double
cassette
deck.
Set
the
REC
MODE
SELECTOR
switch
to
SOURCE.
Select
the
recording
source
with
the
proper
input
select
button.
To
record
from...
acompact
disc
Press
the
CD
button.
a
DAT
cassette
Press
the
DAT
button.
arecord
Press
the
PHONO
button.
the
radio
Press
the
TUNER
button.
an
auxiliary
source
Press
the
AUX
button.
Play
back
the
source.
Prepare
the
tape
deck
for
recording,
then
begin
recording.
Set the REC MODE SELECTOR switch to
DIGITAL.
Press the CD button to record from a compact
disc to a DAT cassette.
Play back the compact disc.
Prepare the DAT deck for recording, then
begin recording.

|, Tape Dubbing
Copying a prerecorded cassette
tape:
Using the graphic equalizer
recording feature
Connect a 2nd cassette deck using the AUX/DAT
jacks of the Akai amplifier. If your cassette deck
has a dubbing feature, you can use it for easy oper-
ation.
o 8 ©
Notes for the recording operation
If you want to adjust the tone controls and bal-
ance control, set the DIRECT OPERATION
switch to OFF before recording. Recorded sig-
nals will not be affected by these adjustments.
Do not touch the input select button or REC
MODE SELECTOR switch of the Akai amplifier
and the level controls of the connected graphic
equalizer
during
recording.
This
will
interfere
with the recording operation.
Refer to page 12 for the graphic equalizer
connection.
Set
the
REC
MODE
SELECTOR
switch
to
SOURCE.
Press the AUX button.
Prepare the AUX deck for playback.
Prepare the TAPE deck for recording.
Begin recording.
Set
the
REC
MODE
SELECTOR
switch
to
PROCESSOR.
Select
the
source
you
want
to
record
with
the
proper
input
select
button.
Playback
a
source
and
adjust
the
frequency
level
controls
of
the
connected
graphic
equalizer.
Prepare the deck for recording, then begin
recording.

Expanding
Your
Hi-Fi
System
Graphic
equalizer
and
turntable
connections
Take advantage of the full potential of your Akai
amplifier and increase your listening pleasure by
adding a turntable or, for more finely adjusted tone
compensation,
a
separate
graphic
equalizer
or
audio processor.
Placement
e Place the Akai turntable on the Akai tuner’s top
panel.
®
Place
the
optional
Akai
graphic
equalizer
or
audio
processor
between
the
Akai
tuner
and
the
Akai
amplifier.
Before connecting
@ Turn off all the components.
e@
Refer
to
the
operator's
manual
of
your
graphic
equalizer
or
audio
processor
for
further
details.
SOURCE INPUT
SOURCE OUTPUT
PROCESSOR OUT
Remove
the
two
short
pins
from
the
amplifier’s
PROCESSOR
IN
and
OUT
jacks.
Do
not
loose
these
pins.
Replace
them
when
an
audio
processor
or
a
graphic
equalizer
is
not
con-
nected
to
the
Akai
amplifier.
If you want to record with the
graphic equalizer
Connect
the
G.E.
REC
IN
jacks
of
the
Akai
amplifier
and
the
TAPE
1
REC
jacks
of
the
Akai
graphic
equalizer.
(Connection-A)
If your turntable has a ground wire
Connect
it
to
the
ground
terminals
(777)
of
the
Akai
amplifier.
Turntable
TAPE 1 REC
tl
cree
Note
I!lustrations indicate additional corinections only.

13
DAT deck connections .
if your DAT deck has an optical or coaxial type digi-
tal interface connection system, you can connect
the Akai amplifier to the DAT OPTICAL terminal or
the COAXIAL jack directly.
Notes for terminals and connections
@ Insert the plug in the terminal with it’s printed
side up.
@ When connecting and disconnecting the cable
hold it by the plug, not the cable.
@ Keep the terminals and plugs clean. Do not
scratch the top of the plugs.
@ Replace the terminal caps when the terminals
are notin use.
®@ Do not bend the cable. Avoid acute angles when
making connections.
. Playback with the digital interface (OPTICAL
terminal or COAXIAL jack) and recording from
the DAT REC PIN jacks
Amplifier
DAT deck
DIGITAL OPTICAL OUTPUT
If you have a 2nd cassette deck
Use the DAT REC/PLAY jacks for connections.
Connect the DAT REC jacks of the Akai amplifier to
the LINE IN jacks of your cassette deck.
Connect the DAT PLAY jacks of the Akai amplifier
. to the LINE OUT jacks of your cassette deck.
* Connect the AUX/DAT REC/PLAY jacks in the
samemanner.
Notes tse .
@ The DAT OPTICAL terminals and the COAXIAL
jack will be cut automatically when the DAT
PLAY PIN jacks are being used.
@ Dotted lines indicate the coaxial cable when
used for connection. ,

Operation details
For the best sound reproduction of
all sources
DIRECT OPERATION
os Set the DIRECT OPERA-
SOURDE © i. DISTAL TION switch to SOURCE
DAT cassette playback.
Note ;
When the DIRECT OPERATION switch is set to
SOURCE or DIGITAL, the BALANCE control and
tone controls are ineffective.
If you want to reduce the volume
instantly during playback |
Press the MUTING but-
ton to ON. The indicator
will light.
To resume the normal
listening volume level
Press the MUTING but-
ton once again to OFF.
The indicator will go off.
To adjust tone during playback
1 Make sure to set the DIRECT OPERATION
switch to OFF.
2 Use the SUPER BASS, BASS and TREBLE tone
controls.
To increase the super bass note |
....Use the SUPER BASS control.
To increase or decrease the bass note
....Use the BASS control.
To increase or decrease the treble note
....Use the TREBLE control.
or DIGITAL during CD or |
When listening to music at low
volume levels
Depress the LOUDNESS button to ON ( = ).
When
listening
to
music
at
normal
or
high
volume
levels,
set
the
LOUDNESS
switch
to
OFF
(
=
).
Ee
|
Loudness compensation
The
human
ear
is
less
sensitive
to
low
and
high
fre-
quencies
at low
volume
levels.
If
these
frequencies
are
not
boosted
or
compensated,
the
sound
will
seem
unnatural.
A
more
natural
sound
can
be
ob-
tained
by
boosting
the
bass
and
treble
responses.
This
is
called
loudness
compensation.
On the Balance control
DIRECT OPERATION
BAL ANCE
OFF
SOURCE ' (XGITAL
‘
1 Make sure to set the DIRECT OPERATION
switch to OFF.
2 Use the BALANCE control when you feel that
there is a deficiency in the left and right balance
due to the speaker placement.
It is best to use a monaural source to test the bal-
ance. After setting the volume, tune in an AM sta-
tion and move the BALANCE control to the left or
right to boost the volume in the left or right channel
respectively.
If the woofer cone vibrates during
record playback
Set the SUBSONIC
switch to ON (= ).
For other source play-
back except record
playback:
Set the SUBSONIC
switch to OFF ( =).
' SUBSONIC
On the subsonic filter .
The subsonic filter will eliminate the ultra low fre-
quency noise (below 15 Hz to 20 Hz) during record
playback. Whatever this amplifier interprets as a .
playback signal will be reproduced. Sometimes
this will include unwanted noise such as subsonic
noise during record playback. The subsonic filter
will eliminate this.
14

15
Headphone
use
and
SPEAKERS
switches
@ SPEAKERS @
A B
Co Co
The SPEAKERS A and B switches allow you to
switch between the speakers connected to the A
SPEAKERS terminals or the B SPEAKERS termi-
nals on the rear panel of the Akai amplifier.
If only one set of speakers is connected to the rear
SPEAKERS terminals, simply set the other switch
to OFF. When listening through headphones, set
both speaker switches to OFF.
Protection circuit _
When the Akai amplifier is turned on, no signal will
be output to the speakers for a few seconds. The
power indicator will first light up red for a few
seconds, then change to green when the Akai
amplifier has gone into normal operation mode.
This is due to the protection circuit which prevents
output of noise when the Akai amplifier is turned
on.
The protection circuit also functions during play-
back to protect the speakers from overloading, and
to protect the circuit from damages. When speak-
ers with less than rated impedance are used, the
protection circuit will short-circuit the + and —,
speaker cords.
When the protection circuit is engaged, the
POWER indicator will change from green to red
and output signals will be cut automatically.
Should the sound be cut during playback and the
power indicator changes from green to red:
1 Turn off the Akai amplifier.
2 Check for and correct the cause.
3 Turn on the Akai amplifier.
The speaker system
Speaker placement
The
playback
characteristics
of
the
speaker
sys-
tem(s)
are
greatly
influenced
by
the
placement
and
the
room
in
which
the
speakers
are
used.
For
example,
if
the
speaker
system
is
placed
near
a
hard
wall,
the
bass
will
sound
better
but
the
treble
might
seem
too
strong.
Play
back
some
music
with-
out
using
the
tone
controls
and
move
the
speaker
system
around
to
find
the
best
location.
However,
please keep the following in mind.
Place the speaker system:
®
Ona
flat
and
solid
surface
which
does
not
trans-
mit
too
many
vibrations.
@ Inawell ventilated, not very humid place.
@
Away
from
direct
sunlight
and
heat
sources
(stoves,
etc.).
@ Away from your turntable and TV.
To
prevent
damage
to
the
speaker
system:
@ Do notraise the volume too high.
e@
Turn
off
the
Akai
amplifier
when
changing
or
connecting
the
player
system’s
cartridge.
-
@
Lower
the
volume
when
changing
radio
stations
and
when
cueing
or
reviewing
tapes.
@
Donottouch
the
speakers’
diaphragms.
How to clean the speaker system(s):
@
Clean
the
speaker
system(s)
with
a
soft,
dry
cloth.
@ Ifitis very dirty, use a mild detergent.
@ To protect the diaphragms (the vibrating parts),
do
not
spray
liquid
cleaner
directly
on
the
speaker
system.
Always
spray
it
on
a
cloth
first.
@
Never
use
alcohol,
paint
thinner
or
uSe
a
Spray-
type
insecticide
near
the
speaker
system,
as
this
will
damage
the
finish.
‘

Problem?
Let’s
check
No sound
Check
to
see
if
the
power
cord
is
connected
—
securely
to
the
household
AC
outlet.
The
input
select
button
corresponding
to
the
music
source
you
want
to
listen
to
is
en-
gaged.
Press
the
appropriate
input
select
button.
The
VOLUME
control
is
set
too
low.
Adjust the VOLUME control.
The
SPEAKERS
switch
is
turned
OFF.
Turn
ON
the
A
and/or
B
SPEAKERS
switch.
The
DIRECT
OPERATION
switch
is
not
set
properly.
Set
the
switch
to
appropriate
position.
MUTING
switch
is
engaged.
Set the switch to OFF.
Protection circuit is engaged.
Check
the
speaker
cord
connections
and
the
speaker
impedance.
The
PROCESSOR
jack’s
short
pins
have
been
removed.
Replace
the
short
pins
when
an
audio
pro-
cessor
or
a
graphic
equalizer
is
not
con-
nected
to
the
Akai
amplifier.
If during playback, you cannot hear the bass
fully or the sound does not seem to be in
stereo.
- @ Check the speaker connections.
Make
sure
that
+
wires
are
connected
to
+
terminals
and
—
wires
to
—
terminals.
Remote
control
operation
will
not
take
place
@
The
POWER
switch
of
each
component
is
not set
to
ON.
Set
all
the
components
to
ON.
®
Battery
power
is
low.
Replace
all
the
batteries.
The
BALANCE
control
and
the
tone
control
are
not
effective
.
@ Check the DIRECT OPERATION switch.
Set the switch to OFF.
|
The
protection
circuit
engages
e
Check
the
speaker
system’s
impedance.
Use
a
speaker
system
of
more
than
6or12
ohms
impedance.
@
Check
the
input
select
button.
;
Press
the
input
select
button
of
the
source
you
want
to
record.
@
Check
the
REC
MODE
SELECTOR
switch.
Set
the
switch
to
the
appropriate
position.
Graphic
equalizer
recording
will
not
perform
Check
the
graphic
equalizer
connections.
Make
sure
the
graphic
equalizer
is
connect-
ed
to
the
PROCESSOR
IN/OUT
and
G.
E.
REC
jacks.
The
REC
MODE
SELECTOR
switch
is
not
set
to
the
PROCESSOR
position.
Set
the
switch
to
the
PROCESSOR
position.
Should
a
problem
persist,
write
down
the
model
and
serial
numbers
and
all
pertinent
data
regarding
warranty
coverage
as
well
as
a
clear
description
of
the
existing
trouble.
Then
contact
your
nearest
au-
thorized
Akai
Service
Station.

17 Specifications
Power output
ByFTC ............... 80 W + 80W/6o0hms
By DIN (1 KHz)......... 80 W + 80 W/6 ohms
Power bandwidth ........ 10 Hz to 60 kHz/0.1%
Total harmonic distortion .0.008% (1 kHz, 8 ohms)
. PHONO max. input level. . 250 mV (MM).
Frequency response
PHONO............... +0.2 dB
CD Direct ............. 5 Hz to 100 kHz
Tone control
Treble ................ +10dB
BaSS: iséccuercieag gees +10dB
Super pass............ +10dB
Input sensitivity/Impedance
PHONO (MM) ......... 2.5 mV/47 kohms
TUNER etc............ 150 mV/47 kohms
Outut level/Impedance
TAPE REC OUT ....... 150 mV/47 kohms
Damping factor.......... 30 (1 kHz)
Residual noise .......... 0.5 mV
S/N
PHONO (MM) ......... 85 dB
TUNER etc............ 100 dB
Channel separation...... 60 dB
Audio mute.............. 20 dB
Required speaker impedance
ALO8 Bos ies cece cee taeds 6 to 16 ohms
AE Biscieicecndasss 12to16 ohms
D/A section
Digital input level/
Impedance.............. 0.5 V p-p/75 ohms
Frequency response..... 5 Hz to 20 kHz +3 dB
Dynamic range .......... 95 dB
Total harmonic distortion .0.003%
Channel separation...... 90 dB (1 kHz)
Power requirements ..... 220 V, 50 Hz for Europe
except UK
240 V, 50 Hz for UK & Australia
Dimensions ............. 385 (W) x 139 (H) x330 (D)
mm
(15.2 x5.5 x13.0 inches)
Weight.................. 10.3 kg (22.7 tbs)
‘Standard accessories
Wireless remote control unit (RC-S930)............ x1
Dry batteries (R-6,DC1.5V)...... 00. cece eee x2
* For improvement purposes, specifications and
design are subject to change without notice.