background image

2

The above warning is located on the top
of the unit

•  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 pres-
ence of important operating and maintenance
(servicing) instructions in the literature
accompanying the product.

IMPORTANT SAFETY INSTRUCTIONS

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.

C A U T I O N

RISK OF ELECTRIC SHOCK

DO NOT OPEN

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 instruc-
tions.

8     Do not install near any heat sources such as

radiators, heat registers, stoves, or other appa-
ratus (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 pro-
vided 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

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 spec-
ified by the manufacturer, or
sold with the apparatus.
When a cart is used, use cau-
tion 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 power-
supply cord or plug is damaged, liquid has been
spilled or objects have fallen into the apparatus,
the apparatus has been exposed to rain or mois-
ture, does not operate normally, or has been
dropped.

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.

BRIDGE

1

1

+

+

-

-

(+)

(-)

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 termi-
nal which is marked with the letter L or coloured RED.

GREEN-AND-YELLOW :  EARTH
BLUE

:  NEUTRAL

BROWN

:  LIVE

WARNING 

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

(3 wires)

Summary of Contents for KAX-2500

Page 1: ...POWER AMPLIFIER 使用说明书 Owner s Manual EN ZH ...

Page 2: ...d by the manufacturer 12 Use only with the cart stand tripod bracket or table spec ified by the manufacturer or sold with the apparatus When a cart is used use cau tion 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 r...

Page 3: ...d 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 ...

Page 4: ...ers This applies only to products KAX 5000 distributed by YAMAHA CORPORATION OF AMERICA Connector pin assignments Interference from Cell Phones 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 pro...

Page 5: ... 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 Variab...

Page 6: ...p green when the corresponding channel s output level exceeds 2 Vrms equivalent to 1 2 W into an 8 Ω load or 1 W into a 4 Ω load 6 Volume control knobs Each control knob adjusts the volume of the corresponding channel in 31 steps from dB to 0 dB NOTE If you wish to lock in the knob settings you can fasten the sup plied security cover over the knobs so that the settings will not be disturbed How to...

Page 7: ... A are effective The Channel B frequency controls are disabled 2 ON OFF switch If you set this switch ON the amplifier adds low frequency compensation so as to enhance speaker output The results the actual change in the low frequency balance will vary accord ing to the speaker type Note that this switch is effective only if the FILTER switch is set to OFF 3 INPUT jacks Channels A B Two jack types ...

Page 8: ...B input jacks do not function Channel A and B volumes can be independently adjusted BRIDGE mode The Channel A input signal is output from the BRIDGE output jacks To adjust the volume you must use the Channel A vol ume control knob 5 SPEAKER jacks Neutrik NL4FC Speakon output connectors 5 way binding post output jacks Phone output jacks For minimum speaker impedenance values see page 9 6 GND termin...

Page 9: ...nding post output jacks When using Speakon connector When using phone jack Connection configurations for BRIDGE mode When using 5 way binding post output jacks When using Speakon connector BRIDGE 1 1 STEREO BRIDGE PARALLEL STEREO BRIDGE PARALLEL or Minimum speaker impedance 4 Ω Minimum speaker impedance 4 Ω SPEAKERS 1 1 2 2 1 1 2 3 3 2 LOCK LOCK Minimum speaker impedance 4 Ω SPEAKERS 1 1 2 2 1 1 2...

Page 10: ... not jut out from the ter minals and touch the chassis The following shows how the cable should look when correctly attached 4 Reattach the protective cover over the speaker terminals Speakon connector 1 Turn off the POWER switch 2 Insert the Neutrik NL4FC plugs into the Speakon connec tor on the rear of the amplifier and turn clockwise to lock Neutrik NL4FC plugs Phone jack 1 Turn off the POWER s...

Page 11: ...tands for Electronic Industries Alliance Ventilation panel s Use 1U size blank panel s If mounting up to four amplifiers in an open backed rack Install a ventilation panel as shown below When mounting five or more amplifi ers in an open backed rack and when mounting any number of amplifiers in a close backed rack Install ventilation panels above and below each amplifier as shown below 480 44 Unit ...

Page 12: ... 1 60 Hz 7 kHz 4 1 Half Power 8 Ω BRIDGE Channel Separation Half Power RL 8 Ω 1 kHz 70 dB Vol max input 600 Ω shunt Residual Noise Vol min 20 Hz 20 kHz DIN AUDIO 70 dBu SN Ratio 20 Hz 20 kHz DIN AUDIO 103 dB 102 dB 100 dB Damping Factor RL 8 Ω 1 kHz 350 200 Sensitivity Vol max Rated Power 8 Ω 6 dBu 4 dBu 3 dBu Voltage Gain Vol max 32 1 dB Input Impedance 30 kΩ balanced 15 kΩ unbalanced Controls Fr...

Page 13: ...F CHANNEL A ATT OFF Limiter Limiter INV Temperature Sensor Heat Sink Protection Circuit CLIP CLIP Ach Power Amp Bch Power Amp SIGNAL PROTECTION TEMP SPEAKERS CHANNEL A 3 3 1 1 2 2 1 1 1 1 2 2 2 2 A B BRIDGE CHANNEL B SIGNAL YAMAHA SPEAKER PROCESSING CHANNEL B ATT PARALLEL BRIDGE STEREO HPF Frequency 25 Hz 150 Hz POWER FAN B E B 24 24 E POWER CIRCUIT Frequency 25 Hz 150 Hz OFF LPF POWER SW ...

Page 14: ... 126 4Ω ch 6 2 3 4 436 188 249 848 214 1 3 power 8Ω ch 9 3 5 1 673 350 323 1100 278 4Ω ch 14 7 8 1 1057 500 557 1900 479 Line Current A Power W Thermal Dissipation 100 120V 230 240V In Out Dissipated Btu h kcal h standby 0 08 0 04 5 0 5 17 4 idle 1 0 0 5 30 0 30 102 26 1 8 power 8Ω ch 3 2 1 7 227 98 130 443 112 4Ω ch 5 0 2 8 378 148 231 787 198 1 3 power 8Ω ch 7 3 4 0 551 260 291 993 250 4Ω ch 12 ...

Page 15: ...r wire Locate and correct the cause of the short The PC limiter circuit operates to protect the power transistors The amplifier load is excessive Use a speaker system with an impedance of at least 4 Ω STEREO PARALLEL mode or 8 Ω BRIDGE mode TEMP indicator lights The heat sink temperature has exceeded 85 C 185 F Check the ventilation slots and provide better airflow around the amplifier The TEMP in...

Page 16: ...28 2160 SWEDEN FINLAND ICELAND Yamaha Music Europe GmbH Germany filial Scandinavia J A Wettergrens Gata 1 Box 30053 S 400 43 Göteborg Sweden Tel 031 89 34 00 DENMARK Yamaha Music Europe GmbH Tyskland filial Denmark Generatorvej 6A DK 2730 Herlev Denmark Tel 44 92 49 00 NORWAY Yamaha Music Europe GmbH Germany Norwegian Branch Grini Næringspark 1 N 1345 Østerås Norway Tel 67 16 77 70 RUSSIA Yamaha M...

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