Yamaha Audio AX-870 User Manual

A X-1070/870

Natural Sound Stereo Integrated Amplifier

145W + 145W (8Ω) RMS Output Power, 0.01% THD, 20–20,000 Hz <AX-1070>
110W + 110W (8Ω) RMS Output Power, 0.015% THD, 20–20,000 Hz <AX-870>

Increased Low Impedance Drive Capability

Continuously Variable Loudness Control

PURE DIRECT Switch to Reproduce the Purest Source Sound

SUBSONIC FILTER Switch to Cut Out Undesirable

Ultra-Low-Frequency Signals

PRE OUT/MAIN IN Terminals Useful for Connecting An Equalizer,

Sound Processor, etc.

Turnover Frequency Switch for Tone Controls

High Quality Components Parts

Remote Control Capability

Thank you for selecting this YAMAHA stereo integrated amplifier.

OWNER’S MANUAL

IMPORTANT!

Please record the serial number of this

CONTENTS

Safety Instructions ................... 2

Supplied Accessories .............. 3

Connections ............................. 4

Operations ............................... 6

Remote Control Transmitter ... 10
Notes about the Remote

Control Transmitter ................. 11

Troubleshooting ...................... 12

Specifications ......................... 13

unit in the space below.
Model:

Serial No.:
The serial number is located on the rear

of the unit.
Retain this Owner’s Manual in a safe
place for future reference.

WARNING

TO REDUCE THE RISK OF FIRE OR
ELECTRIC SHOCK, DO NOT EXPOSE
THIS UNIT TO RAIN OR MOISTURE.

<For AX-1070 only>

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

CAUTION: TO REDUCE THE RISK OF

ELECTRIC SHOCK, DO NOT REMOVE

COVER (OR BACK), NO USER-SERVICEABLE

PARTS INSIDE, REFER SERVICING TO

QUALIFIED SERVICE PERSONNEL.

Explanation of Graphical Symbols

•

The lightning flash with arrowhead
symbol, within an equilateral triangle,
is intended to alert you to the
presence of uninsulated “dangerous
voltage” within the product’s
enclosure that may be of sufficient
magnitude to constitute a risk of
electric shock to persons.

The exclamation point within an
equilateral triangle is intended to alert
you to the presence of important
operating and maintenance
(servicing) instructions in the
literature accompanying the
appliance.

SAFETY INSTRUCTIONS

1 Read Instructions – All the safety and operating

instructions should be read before the unit is operated.

2 Retain Instructions – The safety and operating instructions

should be retained for future reference.

3 Heed Warnings – All warnings on the unit and in the

operating instructions should be adhered to.

4 Follow Instructions – All operating and other instructions

should be followed.

5 Water and Moisture – The unit should not be used near

water – for example, near a bathtub, washbowl, kitchen
sink, laundry tub, in a wet basement, or near a swimming
pool, etc.

6 Carts and Stands – The unit should be used only with a

cart or stand that is recommended by the manufacturer.

6A A unit and cart combination should

be moved with care. Quick stops,
excessive force, and uneven
surfaces may cause the unit and
cart combination to overturn.

7 Wall or Ceiling Mounting – The unit should be mounted to

a wall or ceiling only as recommended by the
manufacturer.

8 Ventilation – The unit should be situated so that its

location or position does not interfere with its proper
ventilation. For example, the unit should not be situated
on a bed, sofa, rug, or similar surface, that may block the
ventilation openings; or placed in a built-in installation,
such as a bookcase or cabinet that may impede the flow
of air through the ventilation openings.

9 Heat – The unit should be situated away from heat

sources such as radiators, stoves, or other appliances that
produce heat.

10 Power Sources – The unit should be connected to a power

supply only of the type described in the operating
instructions or as marked on the unit.

11 Power-Cord Protection – Power-supply cords should be

routed so that they are not likely to be walked on or
pinched by items placed upon or against them, paying
particular attention to cords at plugs, convenience
receptacles, and the point where they exit from the unit.

12 Cleaning – The unit should be cleaned only as

recommended by the manufacturer.

13 Nonuse Periods – The power cord of the unit should be

unplugged from the outlet when left unused for a long
period of time.

14 Object and Liquid Entry – Care should be taken so that

objects do not fall into and liquids are not spilled into the
inside of the unit.

15 Damage Requiring Service – The unit should be serviced

by qualified service personnel when:

A. The power-supply cord or the plug has been

damaged; or

B. Objects have fallen, or liquid has been spilled into the

unit; or

C. The unit has been exposed to rain; or
D. The unit does not appear to operate normally or

exhibits a marked change in performance; or

E. The unit has been dropped, or the cabinet damaged.

16 Servicing – The user should not attempt to service the unit

beyond those means described in the operating
instructions. All other servicing should be referred to
qualified service personnel.

17 Power Lines – An outdoor antenna should be located

away from power lines.

18 Grounding or Polarization – Precautions should be taken

so that the grounding or polarization is not defeated.

Caution: Read this before operating your unit

1 To ensure the finest performance, please read this

manual carefully. Keep it in a safe place for future
reference.

2 Install your unit in a cool, dry, clean place – away from

windows, heat sources, and too much vibration, dust,
moisture or cold. Avoid sources of hum (transformers,
motors). To prevent fire or electrical shock, do not
expose to rain and water.

3 Do not operate the unit upside-down. It may overheat,

possibly causing damage.

4 Never open the cabinet. If a foreign object drops into

the set, contact your dealer.

5 Do not use force on switches, knobs or cords. When

moving the set, first turn the unit off. Then gently
disconnect the power plug and the cords connecting to
other equipment. Never pull the cord itself.

6 Do not attempt to clean the unit with chemical solvents;

this might damage the finish. Use a clean, dry cloth.

2

7 Always set the volume control to “– ∞” before starting

the audio source play: increase the volume gradually to
an appropriate level after the play is started.

8 To prevent lightning damage, pull out the power cord

and remove the antenna cable during an electrical
storm.

9 When not planning to use this unit for long periods

of time (ie., vacation, etc.), disconnect the AC power
plug from the wall outlet.

10 Be sure to read the “Troubleshooting” section on

common operating errors before concluding that your
unit is faulty.

11 Do not connect audio equipment to the AC outlets on

the rear panel if that equipment requires more power
than the outlets are rated to provide.

FCC INFORMATION

1. IMPORTANT NOTICE : DO NOT MODIFY THIS UNIT!

This product, when installed as indicated in the
instructions contained in this manual, meets FCC
requirements. Modifications not expressly approved by
Yamaha may void your authority, granted by the FCC, to
use the product.

2. IMPORTANT : When connecting this product to
accessories and/or another product use only high quality
shielded cables. Cable/s supplied with this product
MUST be used. Follow all installation instructions.
Failure to follow instructions could void your FCC
authorization to use this product in the USA.

3. NOTE : This product has been tested and found to
comply with the requirements listed in FCC Regulations,
Part 15 for Class “B” digital devices. Compliance with
these requirements provides a reasonable level of
assurance that your use of this product in a residential
environment will not result in harmful interference with
other electronic devices.

This equipment generates/uses radio frequencies and, if
not installed and used according to the instructions
found in the users manual, may cause interference
harmful to the operation of other electronic devices.

We Want You Listening For A Lifetime

Compliance with FCC regulations does not guarantee that
interference will not occur in all installations. If this product
is found to be the source of interference, which can be
determined by turning the unit “OFF” and “ON”, please try
to eliminate the problem by using one of the following
measures:

Relocate either this product or the device that is being
affected by the interference.

Utilize power outlets that are on different branch (circuit
breaker or fuse) circuits or install AC line filter/s.

In the case of radio or TV interference, relocate/reorient the
antenna. If the antenna lead-in is 300 ohm ribbon lead,
change the lead-in to coaxial type cable.

If these corrective measures do not produce satisfactory
results, please contact the local retailer authorized to
distribute this type of product. If you can not locate the
appropriate retailer, please contact Yamaha Electronics
Corp., U.S.A. 6660 Orangethorpe Ave, Buena Park, CA

90620.
The above statements apply ONLY to those products

distributed by Yamaha Corporation of America or its
subsidiaries.

YAMAHA and the Electronic Industries Association’s
Consumer Electronics Group want you to get the most out of
your equipment by playing it at a safe level. One that lets the
sound come through loud and clear without annoying blaring or
distortion – and, most importantly, without
affecting your sensitive hearing. Since hearing
damage from loud sounds is often undetectable
until it is too late, YAMAHA and the Electronic
Industries Association’s Consumer Electronics
Group recommend you to avoid prolonged
exposure from excessive volume levels.

SUPPLIED ACCESSORIES

After unpacking, check that the following parts are contained.

●

Remote Control Transmitter

●

Batteries (size AA, R6, UM-3)

3

CONNECTIONS

●

Before attempting to make any connections to or from this unit, be sure to first switch OFF the power to this unit and to any other
components to which connections are being made.

●

When making connections between this unit and other components, be sure all connections are made correctly, that is to say L
(left) to L, R (right) to R, “+” to “+” and “–” to “–”. Also, refer to the owner’s manual for each component to be connected to this
unit.

<AX-1070>

Compact disc player Tuner Tape deck 1 Tape deck 2

Right

(General model)

Speakers A

Left

Turntable

player, LD player,
etc.

* : Refer to “ABOUT THE ACCESSORY TERMINALS” on page 6.

Tape deck 3Video cassette

4

Right

To AC outlet

Left

Speakers B

<AX-870>

English

Compact disc playerTuner Tape deck 1 Tape deck 2

Right

(General model)

Speakers A

Left

Turntable

* : Refer to “ABOUT THE ACCESSORY TERMINALS” on page 6.

Video cassette
player, LD player,
etc.

Right

To AC outlet

Left

Speakers B

5

CONNECTING SPEAKERS

➁

➀

➂

Connect the SPEAKERS terminals to your speakers with wire
of the proper gauge, cut as short as possible. If the
connections are faulty, no sound will be heard from the
speakers. Make sure that the polarity of the speaker wires is
correct, that is, + and – markings are observed. If these wires
are reversed, the sound will be unnatural and will lack bass.

Do not let the bare speaker wires touch each other and do
not let them touch the metal parts of this unit as this could
damage this unit and/or speakers.

How to Connect:

Red: positive (+)
Black: negative (–)

Unscrew the knob.

➀

Insert the bare wire.

➁

[Remove approx. 5mm
(1/4”) insulation from
the speaker wires.]
Tighten the knob and

➂

secure the wire.

●

One or two speaker systems can be connected to this unit.
If you connect only one speaker system, connect it to either
the SPEAKERS A or B terminals.

●

Use speakers with the specified impedance shown on the
rear of this unit.

●

Banana Plug connections are also possible (except for
Scandinavian models). Simply insert the Banana Plug
connector into the corresponding terminal.

ABOUT THE A CCESSORY TERMINALS

AC OUTLETS (SWITCHED)

(Europe and General models)............3 SWITCHED OUTLETS

(Australia and U.K. models)..................1 SWITCHED OUTLET

Use these to connect the power cords from your components
to this unit.
The power to the SWITCHED outlets is controlled by this unit’s

POWER switch or the provided remote control transmitter’s
POWER key. These outlets will supply power to any

component whenever this unit is turned on.
The maximum power (total power consumption of
components) that can be connected to the SWITCHED AC

OUTLETS is 200 watts.

REMOTE CONTROL (PHONO) connector

If you have a YAMAHA turntable with a terminal for remote
control, connect it to this connector by using the cable provided
with the turntable. This connection allows you to control the
turntable from the provided remote control transmitter.

GND terminal (For turntable use)

Connecting the ground wire of the turntable to this terminal will
normally minimize hum, but in some cases better results may
be obtained with the ground wire disconnected.

PRE OUT/MAIN IN terminals

Removing the jumper pins enables this unit to independently
perform the functions of a control amplifier and a power
amplifier. These terminals are for connection of a signal­processing system such as a graphic equalizer or sound
processor.
If a sound processor or other component is connected, the
VOLUME control of this unit can be used for overall
adjustment of the level of sound. To connect such a unit,
remove the jumper pins from the PRE OUT/MAIN IN terminals,
connect the inputs of that unit to the PRE OUT terminals and
its outputs to the MAIN IN terminals. For details, refer to the
owner’s manual included with the unit to be connected.

6

Illustration: AX-1070

POWER

SPEAKERS

3

Parts in shaded area ( )
are not present on AX-870.

English

OPERATIONS

2 3 1,6

TO PLAY A SOURCE

1

Set to the “∞” position.

2

Select a desired input source.

3

PHONES PHONO

4 7

Select the speakers to be used.

4

If you use two speaker systems, press both the A and B

*

switches.

Play the source.

5
6

<AX-1070><AX-870>

If you select turntable as an input source (PHONO

*

position), refer to “Setting the PHONO switch” on page 11.

Adjust to the desired output level.

If desired, adjust the BASS, TREBLE, BALANCE and

7

LOUDNESS controls, etc. (Refer to page 10–11.)

7

Illustration: AX-1070

3

Parts in shaded area ( )
are not present on AX-870.

3,5 3

1

TO RECORD A SOURCE TO TAPE (OR DUB FROM A TAPE TO ANOTHER)

Select the source to be recorded.

1

<AX-1070><AX-870>

REC OUT

1

/

2

TAPE COPY

1/2

3

AUX

CD

TUNER

3

PHONO

REC OUT

1

TAPE COPY

2

1

AUX

CD

TUNER

2

PHONO

2 Play the source.
3 Confirm the source by selecting it with the INPUT

selector and turning up the VOLUME control.

<AX-1070><AX-870>

4 Set the tape deck in the recording mode.
5 To monitor the sound being recorded, select the tape

deck being used for recording with the INPUT selector.

<AX-1070><AX-870>

3

Notes

●

If you want to enjoy another source while recording, select it
with the INPUT selector.

●

VOLUME, BASS, TREBLE, BALANCE, LOUDNESS
controls and PURE DIRECT switch settings have no effect
on the material being recorded.

8

REC OUT selector setting on tape dubbing

REC OUT

AUX

1/2

CD

TUNER

PHONO

2

/

3

TAPE COPY

1

3

REC OUT

AUX

1/2

CD

TUNER

PHONO

2

/

3

TAPE COPY

1

3

REC OUT

AUX

CD

TUNER

PHONO

TAPE COPY

2

1

1

2

REC OUT

AUX

CD

TUNER

PHONO

TAPE COPY

2

1

1

2

<AX-1070><AX-870>

English

To dub from tape deck 1 to
tape deck 2 or 3 (or both
tape deck 2 and 3 at the
same time)

To dub from tape deck 3 to
tape deck 1 or 2 (or both
tape deck 1 and 2 at the
same time)

* Tape dubbing cannot be done from tape deck 2 to tape deck

1 or 3.

To dub from tape deck 1 to
tape deck 2

To dub from tape deck 2 to
tape deck 1

OPEN/CLOSE THE CONTROL DOOR

When it is not necessary to operate controls inside the control door, close the door.
To close the door To open the door

9

Adjusting the BALANCE control Selecting the SPEAKER system

BALANCE

55

4

3

2

l

0

l

2

3

4

L

R

SPEAKERS

BASS

55

4

3

2

l

l

2

3

4

DEFEAT

TREBLE

55

4

3

2

l

l

2

3

4

DEFEAT

6

7

8

9

0

LOUDNESS

6

7

8

9

0

LOUDNESS

TURNOVER FREQUENCY

400Hz

200Hz

2.5kHz

5kHz

Adjust the balance of the output volume to the left and right
speakers to compensate for sound imbalance caused from
speaker location or listening room conditions.

Adjusting the BASS and TREBLE
controls

BASS : Turn this clockwise to increase (or counter-

clockwise to decrease) the low frequency
response.

TREBLE : Turn this clockwise to increase (or counter-

clockwise to decrease) the high frequency
response.

Because one or two speaker systems can be connected to this
unit, the SPEAKERS switches allow you to select speaker
system A or B, or both at once.

Adjusting the continuously variable
LOUDNESS control

This control provides compensation for the human ears’ loss of
sensitivity to high and low-frequency ranges at low volume.
This control is adjustable to retain full tonal range at any
volume level.

1

TURNOVER FREQUENCY switch

<For AX-1070 only>

These switches can be used to adjust the turnover point of the
tone controls: either 200 Hz or 400 Hz for BASS and either 2.5
kHz or 5 kHz for TREBLE. This gives you flexible control over
bass and treble response characteristics.

10

Set to the “FLAT” position.

2

Set to the loudest listening level that
you would listen to.

3

Turn so that the desired volume can
be achieved.

English

PURE

DIRECT

MC

MM

PHONO

SUBSONIC

FILTER

ON

OFF

MONO

STEREO

MODE

PHONES

Using the PURE DIRECT switch

You can enjoy the purest possible sound from your audio
sources by setting this switch so that the indicator illuminates.
By doing so, the audio signal bypasses the BASS, TREBLE,
BALANCE and LOUDNESS controls, the SUBSONIC FILTER
switch and the PRE OUT/MAIN IN terminals, eliminating any
alterations to the audio signal.

Setting the SUBSONIC FILTER switch

If you set this switch to “ON” position, undesirable ultra-low­frequency signals caused by turntable rumble or warped
records can be cut out without losing sound quality.

Setting the PHONO switch

Select either MM or MC position depending on your PHONO
cartridge, Moving Magnet or Moving Coil type. However, if you
use a high output MC cartridge, select MM position.

Setting the MODE switch

For AX-1070 only

<

This switch can be used for switching between stereo and
monaural operation. Normally this switch should be set to the
STEREO position.

>

When you listen with headphones

Connect the headphones to the PHONES jack. When listening
with headphones privately, set both the SPEAKERS A and B
switches to the OFF position.

11

REMOTE CONTROL TRANSMITTER

The remote control transmitter provided with this unit is designed to control all the most commonly used functions of the unit. If the
CD player, tuner, turntable, equalizer, and tape deck connected to this unit are YAMAHA components, then this remote control
transmitter will also control various functions of each component.

KEY FUNCTIONS

For Control of This Unit

Turns the power on/off.

Selects input source.

When pressed, mutes the volume
level. To resume original volume
level, press this again.
While muting, the indicator on the
VOLUME control flashes on and off
continuously.

Turns the volume level up/down.

For Other Component Control

Identify the remote control transmitter keys with your component’s keys. If these keys are identical, their function will be the
same. On each key function, refer to the corresponding instruction on your component’s manual.

Starts/stops record play on turntable.

Controls tuner
+: Selects higher preset station

number.

–: Selects lower preset station

number.

A/B/C/D/E: Selects the page (A – E)

of preset station buttons.

Controls tape deck.

DIR A, B and DECK A/B are

*

applicable only to double cassette
tape deck.
For a single cassette deck with

*

automatic reverse function,
pressing DIR A will reverse the
direction of tape running.

Controls compact disc player.
* DISC SKIP is applicable only to

compact disc changer.

Controls equalizer.
* PRESET selects any preset

equalizer curve whenever this is
pressed. (After the last preset curve
is selected, it returns to the first one
by another press on this key.)

Illustration: AX-1070

Parts in shaded area ( ) are not present on AX-870.

12

STANDBY mode (For Europe model only)

2

3

1

30°

30°

While the power is on, pressing the POWER key on the remote
control transmitter switches the unit to the STANDBY mode.
(In this mode, the indicator is half illuminated.)

Note
To turn the power off completely, disconnect the AC
power plug from the wall outlet.

POWER on mode STANDBY mode

NOTES ABOUT THE REMOTE CONTROL TRANSMITTER

English

Battery installation

Battery replacement

If you find that the remote control transmitter must be used
closer to the main unit, the batteries are weak. Replace both
batteries with new ones.

Notes

●

Use only AA, R6, UM-3 batteries for replacement.

●

Be sure the polarities are correct. (See the illustration inside
the battery compartment.)

●

Remove the batteries if the remote control transmitter will
not be used for an extended period of time.

●

If batteries leak, dispose of them immediately. Avoid
touching the leaked material or letting it come in contact with
clothing, etc. Clean the battery compartment thoroughly
before installing new batteries.

Remote control transmitter operation range

Remote control
sensor

Within approximately
7 m (23 feet)

Notes

●

There should be no large obstacles between the remote
control transmitter and the main unit.

●

If the remote control sensor is directly illuminated by strong
lighting (especially an inverter type of fluorescent lamp etc.),
it might cause the remote control transmitter not to work
correctly. In this case, reposition the main unit to avoid
direct lighting.

13

TROUBLESHOOTING

If the unit fails to operate normally, check the following points to determine whether the fault can be corrected by the simple
measures suggested. If it cannot be corrected, or if the fault is not listed in the SYMPTOM column, disconnect the power cord and
contact your authorized YAMAHA dealer or service center for help.

SYMPTOM

The unit fails to turn on when the POWER
switch is pressed.

No sound.

The sound suddenly goes off.

Only one side speaker outputs the sound.

There is a lack of bass, and no ambience.

Sound “hums”.

Sound level is low.

Using the BASS, TREBLE, BALANCE,
LOUDNESS controls and SUBSONIC
FILTER switch does not affect the tone.

The remote control transmitter does not
work.

The distance or range within which the
remote control transmitter can be used
decreases.

CAUSE

Power cord is not plugged in or is not
completely inserted.

Incorrect output cord connections.

Appropriate input source is not selected.

Speaker connections are not secure.
The protection circuit has activated because

of short circuit etc.
Incorrect setting of the BALANCE control.
Incorrect cord connections.

The + and – wires are connected in reverse
at the amplifier or speakers.

Incorrect cord connections.

No connection from the turntable to the GND
terminal.

The LOUDNESS control is functioning.

The MUTING switch is ON.

The PURE DIRECT switch is ON.

Direct sunlight or lighting (of an inverter type
of flourescent lamp etc.) is striking the
remote control sensor of the main unit.

The batteries of this remote control
transmitter are too weak.

REMEDY

Firmly plug in the power cord.

Connect the cords properly. If the problem
persists, the cords may be defective.

Select an appropriate input source with the
INPUT selector.

Secure the connections.
Turning the unit off and then on will reset the

protection circuit.
Adjust it to the appropriate position.
Connect the cords properly. If the problem

persists, the cords may be defective.
Connect the speaker wires in the correct

phase (+ and –).
Firmly connect the audio plugs. If the

problem persists, the cords may be defective.

Make the GND connection between the
turntable and this unit.

Set the LOUDNESS control to the FLAT
position.

First, turn the volume control to the full left.
Then, turn the MUTING switch OFF with the
remote control transmitter and adjust the
volume.

The PURE DIRECT switch must be switched
OFF to use those controls.

Change position of the main unit.

Replace the batteries with new ones.

14

SPECIFICATIONS

English

Minimum RMS Output Power per Channel

<AX-1070>

8 ohms, 20 Hz to 20 kHz, 0.01% THD

...............................................145W+145W

6 ohms, 20 Hz to 20 kHz, 0.02% THD

...............................................185W+185W

<AX-870>

8 ohms, 20 Hz to 20 kHz, 0.015% THD

...............................................110W+110W

6 ohms, 20 Hz to 20 kHz, 0.03% THD

...............................................130W+130W

Dynamic Power per Channel
(by IHF Dynamic Headroom measuring
method)

<AX-1070>

8/6/4/2 ohms.................220/290/360/460W

<AX-870>

8/6/4/2 ohms.................150/200/250/330W

DIN Standard Output Power per Channel
[Europe model only]

<AX-1070>

(4 ohms, 1 kHz, 0.7% THD) ..............250W

<AX-870>

(4 ohms, 1 kHz, 0.7% THD) ..............185W

Dynamic Headroom [General model only]

<AX-1070>

8/6 ohms...........................1.81 dB/1.95 dB

<AX-870>

8/6 ohms...........................1.35 dB/0.97 dB

IEC Power (8 ohms, 1 kHz, 0.01% THD)

[Europe model only]

<AX-1070>.......................................170W

<AX-870>.........................................125W

Power Band Width

<AX-1070>

8 ohms, 72.5W, 0.03% THD

..........................................10 Hz to 50 kHz

<AX-870>

8 ohms, 55W, 0.03% THD

..........................................10 Hz to 50 kHz

Damping Factor

8 ohms, 20 Hz–20 kHz

<AX-1070>................................350 or more

<AX-870>..................................320 or more

Input Sensitivity/Impedance

PHONO MM.....................2.5 mV/47 k-ohms

PHONO MC ......................160 µV/220 ohms

CD/TUNER/TAPE/AUX

........................................150 mV/47 k-ohms

MAIN IN

<AX-1070>..........................1.0V/47 k-ohms

<AX-870>............................0.9V/47 k-ohms

Maximum Input Signal (1 kHz, 0.01% THD)

<AX-1070>

PHONO MM......................................170 mV

PHONO MC.....................................13.5 mV

<AX-870>

PHONO MM......................................160 mV

PHONO MC.....................................12.5 mV

Output Level/Impedance

<AX-1070>

REC OUT ....................150 mV/2.2 k-ohms

PRE OUT..........................1.0V/1.8 k-ohms

<AX-870>

REC OUT ....................150 mV/2.2 k-ohms

PRE OUT..........................1.0V/1.6 k-ohms

Maximum Voltage Output

<AX-1070>

20 Hz to 20 kHz, 0.02% THD..............6.5V

<AX-870>

20 Hz to 20 kHz, 0.01% THD..............1.4V

Headphone Jack Rated Output/ Impedance

Output Level (8 ohms, 1 kHz, 0.015% THD)

<AX-1070>..........................................1.05V

<AX-870>..............................................0.5V

Impedance

<AX-1070>...................................220 ohms

<AX-870>.....................................470 ohms

Frequency Response (20 Hz to 20 kHz)

CD/TUNER/TAPE/AUX
MAIN IN

RIAA Equalization Deviation (20 Hz to 20 kHz)

PHONO MM......................................±0.3 dB

PHONO MC......................................±0.5 dB

Total Harmonic Distortion (20 Hz to 20 kHz)

...........................................0±0.5 dB

....................0±0.5 dB

<AX-1070>

PHONO MM to REC OUT (3V) ......0.003%

PHONO MC to REC OUT (3V).......0.007%

CD/TUNER/TAPE/AUX

........................................................0.004%

CD/TUNER/TAPE/AUX

(72.5W/8 ohms)..............................0.007%

MAIN IN

(72.5W/8 ohms)..............................0.005%

to SP OUT

to PRE OUT (1V)

to SP OUT

<AX-870>

PHONO MM to REC OUT (3V) ......0.003%

PHONO MC to REC OUT (3V).......0.007%

CD/TUNER/TAPE/AUX

........................................................0.005%

CD/TUNER/TAPE/AUX

(55W/8 ohms).................................0.008%

MAIN IN

(55W/8 ohms).................................0.006%

Signal-to-Noise Ratio (IHF-A Network)

PHONO MM (5 mV Input Shorted)

............................................................ 92 dB

PHONO MC (500 µV Input Shorted)

............................................................ 75 dB

CD/TUNER/TAPE/AUX

(PURE DIRECT; ON)..................... 110 dB

Residual Noise (IHF-A Network)

(PURE DIRECT; ON)

to SP OUT

to PRE OUT (1V)

to SP OUT

(Input Shorted)

<AX-1070>..........................................35 µV

<AX-870>............................................80 µV

Channel Separation (Vol. –30 dB)

PHONO MM/MC (Input Shorted

1 kHz/10 kHz) .........................70 dB/55 dB

CD/TUNER/TAPE/AUX

Terminated 1 kHz/10 kHz)......65 dB/50 dB

Tone Control Characteristics

BASS:

Boost/cut ............................±10 dB (20 Hz)

Turnover Frequency

(Input 5.1 k-ohms

<AX-1070>...........................200, 400 Hz

<AX-870>.....................................350 Hz

TREBLE:

Boost/cut...........................±10 dB (20 kHz)

Turnover Frequency

<AX-1070>..............................2.5, 5 kHz

<AX-870>....................................3.5 kHz

Filter Characteristics

SUBSONIC FILTER .........15 Hz, –18 dB/oct

Continuous Loudness Control

(Level related equalization)
Attenuation

<AX-1070> ........................–40 dB (1 kHz)

<AX-870> ..........................–30 dB (1 kHz)

Audio Muting <AX-1070 only>.............–20 dB

Gain Tracking Error (0 to –60 dB)............2 dB

Power Supply

[Australia and U.K. models]

..........................................AC 240V, 50 Hz

[Europe model]..................AC 230V, 50 Hz

[General model]

................AC 110/120/220/240V, 50/60 Hz

Power Consumption

<AX-1070>..........................................370W

<AX-870>............................................270W

AC Outlets

[Europe and General models]

3 SWITCHED OUTLETS

..........................................200W max. total

[Australia and U.K. models]

1 SWITCHED OUTLET

..........................................200W max. total

Dimensions (W x H x D)

......................................435 x 171 x 448 mm

(17-1/8” x 6-3/4” x 17-5/8”)

Weight

<AX-1070>................18.3 kg (40 lbs. 4 oz.)

<AX-870>................14.0 kg (30 lbs. 13 oz.)

Accessories...........Remote control transmitter

Batteries

Specifications subject to change without
notice.

15

15

YAMAHA ELECTRONICS CORPORATION, USA6660 ORANGETHORPE AVE., BUENA PARK, CALIF. 90620, U.S.A.
YAMAHA CANADA MUSIC LTD.135 MILNER AVE., SCARBOROUGH, ONTARIO M1S 3R1, CANADA
YAMAHA ELECTRONIK EUROPA G.m.b.H.SIEMENSSTR. 22-34, D-25462 RELLINGEN BEI HAMBURG, F.R. OF GERMANY
YAMAHA ELECTRONIQUE FRANCE S.A.RUE AMBROISE CROIZAT BP70 CROISSY-BEAUBOURG 77312 MARNE-LA-VALLEE CEDEX02, FRANCE
YAMAHA ELECTRONICS (UK) LTD.YAMAHA HOUSE, 200 RICKMANSWORTH ROAD WATFORD, HERTS WD1 7JS, ENGLAND
YAMAHA SCANDINAVIA A.B.J A WETTERGRENS GATA 1, BOX 30053, 400 43 VÄSTRA FRÖLUNDA, SWEDEN
YAMAHA MUSIC AUSTRALIA PTY, LTD.17-33 MARKET ST., SOUTH MELBOURNE, 3205 VIC., AUSTRALIA

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