Yamaha KAX-3500, KAX-2500, KAX-5000 User Manual
POWER AMPLIFIER
使用说明书
Owner’s Manual
ZH
EN
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.
The above warning is located on the top
of the unit
IMPORTANT SAFETY INSTRUCTIONS
• Explanation of Graphical Symbols
The lightning flash with arrowhead symbol
within an equilateral triangle is intended to
alert the user 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 the user to the presence of important operating and maintenance
(servicing) instructions in the literature
accompanying the product.
1 Read these instructions.
2 Keep these instructions.
3 Heed all warnings.
4 Follow all instructions.
5 Do not use this apparatus near water.
6 Clean only with dry cloth.
7 Do not block any ventilation openings. Install in
accordance with the manufacturer’s instructions.
8 Do not install near any heat sources such as
radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
9 Do not defeat the safety purpose of the polar-
ized or grounding-type plug. A polarized plug
has two blades with one wider than the other. A
grounding type plug has two blades and a third
grounding prong. The wide blade or the third
prong are provided for your safety. If the provided plug does not fit into your outlet, consult
an electrician for replacement of the obsolete
outlet.
10 Protect the power cord from being walked on or
pinched particularly at plugs, convenience
IMPORTANT NOTICE FOR THE UNITED KINGDOM
Connecting the Plug and Cord
WARNING: THIS APPARATUS MUST BE EARTHED
IMPORTANT. The wires in this mains lead are coloured in accordance
with the following code:
As the colours of the wires in the mains lead of this apparatus may not
correspond with the coloured markings identifying the terminals in
your plug proceed as follows:
The wire which is coloured GREEN-and-YELLOW must be connected
to the terminal in the plug which is marked by the letter E or by the
safety earth symbol or colored GREEN or GREEN-and-YELLOW.
The wire which is coloured BLUE must be connected to the 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.
GREEN-AND-YELLOW : EARTH
BLUE : NEUTRAL
BROWN : LIVE
receptacles, and the point where they exit from
the apparatus.
11 Only use attachments/accessories specified by
the manufacturer.
12 Use only with the cart, stand,
tripod, bracket, or table specified by the manufacturer, or
sold with the apparatus.
When a cart is used, use caution when moving the cart/
apparatus combination to
avoid injury from tip-over.
13 Unplug this apparatus during lightning storms
or when unused for long periods of time.
14 Refer all servicing to qualified service person-
nel. Servicing is required when the apparatus
has been damaged in any way, such as powersupply cord or plug is damaged, liquid has been
spilled or objects have fallen into the apparatus,
the apparatus has been exposed to rain or moisture, does not operate normally, or has been
dropped.
WARNING
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,
DO NOT EXPOSE THIS APPARATUS TO RAIN OR MOISTURE.
++ --
11
(+)(-)
BRIDGE
This mark indicates a dangerous electrically live terminal.
When connecting an external wire to this terminal, it is
necessary either to have “a person who have received
appropriate guidance on handling” make the connection or to
use leads or a cord that have been manufactured in such a way
that the connection can be made simply and without problem.
(3 wires)
2
Precautions
— For safe operation —
WARNING
Installation
● Connect this unit’s power cord only to an AC outlet of the type
stated in this Owner’s Manual or as marked on the unit. Failure
to do so is a fire and electrical shock hazard.
● Do not allow water to enter this unit or allow the unit to
become wet. Fire or electrical shock may result.
● Do not place a container with liquid or small metal objects on
top of this unit. Liquid or metal objects inside this unit are a
fire and electrical shock hazard.
● Do not place heavy objects, including this unit, on top of the
power cord. A damaged power cord is a fire and electrical
shock hazard. In particular, be careful not to place heavy
objects on a power cord covered by a carpet.
● Be sure to connect to an appropriate outlet with a protective
grounding connection. Improper grounding can result in electrical shock.
Operation
● Do not scratch, bend, twist, pull, or heat the power cord. A dam-
aged power cord is a fire and electrical shock hazard.
● Do not remove the unit’s cover. You could receive an electrical
shock. If you think internal inspection, maintenance, or repair is
necessary, contact your dealer.
● Do not modify the unit. Doing so is a fire and electrical shock haz-
ard.
● If lightning begins to occur, turn off the power switch of the unit as
soon as possible, and unplug the power cable plug from the electrical outlet.
● If there is a possibility of lightning, do not touch the power cable
plug if it is still connected. Doing so may be an electrical shock
hazard.
In case an abnormality occurs during operation
● If the power cord is damaged (i.e., cut or a bare wire is exposed),
ask your dealer for a replacement. Using the unit with a damaged
power cord is a fire and electrical shock hazard.
● Should this unit be dropped or the cabinet be damaged, turn the
power switch off, remove the power plug from the AC outlet, and
contact your dealer. If you continue using the unit without heeding
this instruction, fire or electrical shock may result.
● If you notice any abnormality, such as smoke, odor, or noise, or if
a foreign object or liquid gets inside the unit, turn it off immediately. Remove the power cord from the AC outlet. Consult your
dealer for repair. Using the unit in this condition is a fire and electrical shock hazard.
CAUTION
Installation
● Keep this unit away from the following locations:
- Locations exposed to oil splashes or steam, such as near cooking stoves, humidifiers, etc.
- Unstable surfaces, such as a wobbly table or slope.
- Locations exposed to excessive heat, such as inside a car with
all the windows closed, or places that receive direct sunlight.
- Locations subject to excessive humidity or dust accumulation.
● Do not place the power cord close to a heater. It may melt, causing
fire or electrical shock.
● Hold the power cord plug when disconnecting it from an AC out-
let. Never pull the cord. A damaged power cord is a potential fire
and electrical shock hazard.
● Do not touch the power plug with wet hands. Doing so is a poten-
tial electrical shock hazard.
● This unit has ventilation holes at the front and rear to prevent the
internal temperature rising too high. Do not block them. Blocked
ventilation holes are a fire hazard.
In particular, do not
- place the unit on its side or upside down,
- place the unit in any poorly-ventilated location such as a bookcase or closet (other than on the dedicated rack),
- cover the unit with a table cloth or place it on a carpet or bed.
● Allow enough free space around the unit for normal ventilation.
This should be: 5 cm at the sides, 10 cm behind, and 10 cm above.
If the airflow is not adequate, the unit will heat up inside and may
cause a fire.
● To mount several of these units in a standard EIA rack, refer to the
rack mounting instructions on page 11.
● To relocate the unit, turn the power switch off, remove the power
plug from the AC outlet, and remove all connecting cables. Damaged cables may cause fire or electrical shock.
● When setting up the product, make sure that the AC outlet you are
using is easily accessible. If some trouble or malfunction occurs,
immediately turn off the power switch and disconnect the plug
from the outlet. Even when the power switch is turned off, electricity is still flowing to the product at the minimum level. When you
are not using the product for a long time, make sure to unplug the
power cord from the wall AC outlet.
● Do not place the device in a location where it may come into con-
tact with corrosive gases or salt air. Doing so may result in malfunction.
Operation
● Use only speaker cables when connecting speakers to amplifier
outputs. Using other types of cables is a fire hazard.
● Turn off all musical instruments, audio equipment, and speakers
when connecting to this unit. Use the correct connecting cables
and connect as specified.
● Always lower the volume control to minimum before turning on
the power to this unit. A sudden blast of sound may damage your
hearing.
● Do not use this amplifier for any purpose other than driving loud-
speakers.
● If you know you will not use this unit for a long period of time,
such as when going on vacation, remove the power plug from the
AC outlet. Leaving it connected is a potential fire hazard.
3
— For correct operation —
Connector pin assignments Interference from Cell Phones
● XLR-type connectors are wired as follows
Pin 1: ground; Pin 2: hot (+); Pin 3: cold (–).
Always turn the power off when the amplifier is not in use.
Illustrations in this manual are for explanatory purposes only, and may not match the actual appearance of the product during operation.
Company names and product names used in this Owner's Manual are trademarks or registered trademarks of their respective owners.
● Use of a mobile phone near this unit may induce noise. If noise
occurs, move the phone further from the unit.
FCC INFORMATION (U.S.A.)
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.
* This applies only to products (KAX-5000) distributed by YAMAHA CORPORATION OF AMERICA.
4
Introduction
Thank you for your purchase of the YAMAHA KAX-5000, KAX3500 or KAX-2500 power amplifier.
These KAX-series amplifiers fully incorporate Yamaha’s renown technological expertise, and offer
high reliability, rock-solid stability, and superb acoustic characteristics—all in a trim, 2U-sized package.
Fe a t u r e s
• With two types of input jacks (balanced XLR and balanced phone) and three types of output jacks
(Speakon, 5-way binding post, and phone), the KAX-series is suitable for a wide variety of applications and installed systems.
• The unit offers three operating modes: STEREO (where Channels A and B operate independently),
PARALLEL (where the unit outputs a mono source through twin amplifier systems), and BRIDGE
(where the unit operates as a single high-power amp).
• Each channel is equipped with an independent OFF/LOW CUT/SUBWOOFER switch—where LOW
CUT engages a high-pass filter, and SUBWOOFER engages a low-pass filter. With LOW CUT or
SUBWOOFER selected, you can adjust the cutoff frequency from 25 to 150 Hz.
• Each channel has its own SIGNAL and CLIP indicators.
• The PROTECTION indicator lights up—and sound output is automatically muted—whenever the
unit’s protective circuitry is operating. The TEMP indicator lights up if the unit is running hot.
• Variable-speed low-noise fans ensure high reliability.
This Owner’s Manual covers the three models: KAX-5000, KAX-3500 and KAX-2500 power amplifiers. Please read through this manual carefully before beginning use, so that you will be able to take full
advantage of the amplifier’s superlative features and enjoy trouble-free operation for years to come.
After reading through the manual, please store it in a safe place.
Contents
Controls and Functions ..................................... 6
Front Panel .......................................................... 6
Rear Panel ........................................................... 7
Speaker Connections ........................................ 9
Speaker impedance ............................................. 9
Wiring ................................................................ 10
Rack Mounting ................................................ 11
Specifications .................................................. 12
General Specifications ....................................... 12
Block Diagram ................................................... 13
Dimensions ........................................................ 14
Current Draw ..................................................... 14
Troubleshooting ............................................... 15
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