Musical Fidelity KW 500 Manual de usuario

kW 500 Integrated Amplifier Instructions for use Page 1 of 10

Issue 2: Sept 2004

DUAL MONO INTEGRATED AMPLIFIER

INSTRUCTIONS FOR USE

Thank you for purchasing the Musical Fidelity kW500 Integrated amplifier.

Used properly and carefully, it should give you many years of outstanding

musical reproduction.

Dust regularly with a soft cloth or soft brush, but be careful when using

cleaning or polishing agents - they may harm the surface finish.

If you have any questions about your audio system,

please consult your dealer who is there to help and advise.

kW 500 Integrated Amplifier Instructions for use Page 2 of 10

SAFETY INFORMATION

Issue 2: Sept 2004

IMPORTANT! (U.K. only)

This unit is supplied in the U.K. with a mains lead fitted with a moulded 13 amp plug.

If, for any reason, you need to cut off this plug, please remove the fuse holder and dispose of

the plug safely, out of reach of children. It must not be plugged into a mains outlet.

The wires in the mains lead supplied with this appliance are coloured in accordance

with the following code:

Green and yellow..............Earth

Blue...............................Neutral

Brown................................Live

WARNING - This appliance must be earthed

As the colours of the wires of the mains lead of this appliance 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 with the letter E or coloured green or green-and-yellow, or by the earth

The wire which is coloured brown must be connected to the terminal which is marked with the

letter L or coloured red.

The wire which is coloured blue must be connected to the terminal which is marked with the

letter N or coloured black.

If connecting to a BS1363 plug, a 13 amp fuse must be used.

WARNING:

The kW 500 Integrated is a powerful amplifier and must necessarily supply high

voltages through the loudspeaker terminals. Therefore, to avoid any possibility of

an electric shock DO NOT TOUCH THE SPEAKER TERMINALS when the unit

is being used. To comply with BSEN60065 safety regulations, the 4mm “banana”

plug holes have been fitted with plastic blanking pieces. Removal of these will

invalidate any electrical safety approval of this product.

WARNING:

Any modifications to this product not expressly approved by Musical Fidelity who

is the party responsible for standards compliance could void the user’s authority to

operate this equipment.

kW 500 Integrated Amplifier Instructions for use Page 3 of 10

GENERAL ADVICE

Issue 2: Sept 2004

INSTALLATION PRECAUTIONS and USER INFORMATION

Your new kW 500 Integrated amplifier is designed and built to provide trouble-free perform-

ance, but as with all electronic devices it is necessary to observe a few precautions:

Heed all warnings shown on the back of the product.

Only connect the kW 500 Integrated amplifier to a mains outlet having the same voltage as

marked at the back of the unit.

Always ensure that when disconnecting and reconnecting your audio equipment the mains

supply is switched off.

Position the mains lead and signal interconnects where they are not likely to be walked on or

trapped by items placed on them.

Do not use near water, or place water-filled containers on the amplifier, for example, flower

vases or potted plants. If water does spill inside, immediately pull out the mains plug from

the wall socket and inform your dealer, who should then check the unit before further use.

Entry of liquid into the amplifier is dangerous, and may cause electric shock or fire hazard.

Do not place the unit near heat sources such as radiators, direct sunlight or other equipment.

The case of this amplifier can run at high temperatures - operate the unit in a well ventilated

area, and do not touch the cabinet sides or top after periods of use at high output power.

Do not remove covers or try to gain access to the inside. There are no internal user adjust-

ments or fuses you can replace yourself. Refer all service work to an authorised Musical

Fidelity agent.

NOTE: Unauthorised opening of the equipment will invalidate any warranty claims.

Dust regularly with a soft duster or soft brush, but be careful when using cleaning or polishing

agents - they may harm the surface finish.

The electronics in modern hi-fi equipment is complex and may, therefore, be adversely affected

or damaged by lightning. For protection of your audio system during electrical storms, remove

the mains plugs and disconnect any aerial lead.

If after-sales service is required, to help your dealer identify the kW 500 Integrated amplifier

please quote the serial number located on the rear panel of the unit.

RADIO FREQUENCY INTERFERENCE (R.F.I)

This product has been tested to ensure that its operation is not adversely affected by normal

background levels of R.F.I., and that it does not itself generate excessive amounts of interfer-

ence. However, if a problem persists, please contact your Musical Fidelity agent.

kW 500 Integrated Amplifier Instructions for use Page 4 of 10

CONNECTIONS AND FACILITIES - MAIN UNIT

Issue 2: Sept 2004

11 12 13 14 15 16 17 18 19

Main unit front panel layout

1 Illuminated feet with multi-colour

indicator LEDs for power and mute

2TAPE MONITOR selector button

and LED

3PHONO input selector button and LED

4CD input selector button and LED

5 Volume control

6SACD input selector button and LED

7TUNER input selector button and LED

8 Infra red receiver for remote control

9AUXiliary input selector button and

LED

10 TAPE input selector button and LED

Main unit back panel layout

11 Right SPEAKER output

terminals (two pairs)

12 PRE-amplifier OUTput sockets

13 TAPE RECord output sockets

14 TAPE input sockets

15 AUXiliary input sockets

16 TUNER input sockets

17 SACD input sockets

18 CD input sockets

19 PHONO input sockets

20 Left SPEAKER output

terminals (two pairs)

21 Amplifier power inlet socket

- right channel

22 Pre-amplifier power inlet socket

23 Phono earth terminal

24 Amplifier power inlet socket

- left channel

3 4 5 6

21 22 23 24

7 8 9 10 1

kW 500 Integrated Amplifier Instructions for use Page 5 of 10

CONNECTIONS AND FACILITIES - POWER SUPPLY

Issue 2: Sept 2004

FOR USE ONLY

WITH MUSICAL

FIDELITY

KW 500

Power supply unit back panel layout

1 Right power amplifier PSU output

2 Pre-amplifier PSU output

3 Left power amplifier PSU output

4 Right power amplifier PSU fuse

5 Pre-amplifier PSU fuse

6 Left power amplifier PSU fuse

7 Mains inlet - 16 Amp IEC type

4567

123

Mains on/off

push switch Power LED (blue)

kW 500 Integrated Amplifier Instructions for use Page 6 of 10

Issue 2: Sept 2004

REMOTE CONTROL

The blue buttons on the remote control enable main functions of the amplifier to be operated

from a convenient distance. Remaining buttons on this universal handset are for use with other

Musical Fidelity products, and have no effect on the kW 500 Integrated amplifier.

Equivalent buttons on the remote handset have the same functions as those on the front panel of

the unit.

As the remote control uses an invisible infra-red light beam, the transmitter must be pointed

directly towards the receiver window on the front of the amplifier, without visual obstruction

between them.

Pressing the volume-up or -down buttons on the remote handset will turn the motorised volume

control in the required direction.

The MUTE button mutes the SPEAKER output and PRE-OUT sockets. To show that the

amplifier is muted, the LEDs in the feet will change from their current colour to red. Press the

MUTE button again to cancel mute function, and the feet LEDs will revert to their previous

colour (see page 8, under “Starting”).

If the range of the remote control greatly decreases, replace the batteries with new ones.

Do not mix old and new batteries - two are required, type SUM-4, AAA or LR03. Do not

dispose of used batteries in a fire.

VOLUME (Up)

VOLUME (Down)

PHONO pickup

input select

CD input select

TAPE input select

MUTE button

SACD input select

TUNER

input select

AUXiliary

input select

kW 500 Integrated Amplifier Instructions for use Page 7 of 10

CONNECTIONS

Issue 2: Sept 2004

PRE-AMPLIFIER OUTPUT

The kW 500 Integrated amplifier has its

pre-amplifier output available from RCA

sockets on the back panel marked PRE-

OUT, and is controlled by the volume

adjustment.

This is to allow “bi-amplification” using

suitable external amplifiers and crossover

networks to power the speaker drive com-

ponents separately, giving noticeable

improvement in clarity, imaging and bass

weight.

In this arrangement, typically the kW 500’s

speaker outputs are used to drive the speak-

er’s “tweeter” (high audio frequencies), and

an external stereo amplifier drives the

“woofer” (low frequencies).

The kW 500’s PRE OUT RCA sockets

would therefore be connected to the input

of the external “woofer” amplifier in this

example.

If you are in doubt about bi-amplification,

please contact your dealer for advice.

BEFORE SWITCHING ON

Connect the two accessory power supply

leads into the RIGHT and LEFT PSU

(Power Supply Unit) INPUT sockets at the

rear of the amplifier. The other ends of the

leads plug into corresponding marked sock-

ets on the back panel of the power supply

unit.

A single lead with smaller plugs connects

between the PRE-AMP PSU sockets on

each unit.

Plug the accessory IEC mains lead into the

rear PSU mains socket, then the other end

into a wall outlet. Turn the volume control

on the front panel to low (anticlockwise).

All input, output and power connections

should be made with the mains power

switched OFF.

INPUT CONNECTIONS

The kW 500 Integrated amplifier has a pair

of phono inputs for moving magnet (MM)

pickups.

Some turntable/pickup arm combinations

are fitted with an extra wire for chassis

earthing. This should be connected to the

earth terminal on the back panel.

The kW 500 also has five “line level”

inputs which are electrically identical, and

therefore suitable for use with any source

component having an output of at least

300mV. The sockets on the rear panel are

marked CD, SACD, TUNER, AUXiliary,

and TAPE, to correspond with function

buttons on the front panel.

Using good quality co-axial audio leads,

connect the left and right outputs from

your CD player, tuner or phono/record

deck to the appropriate RCA input sockets

on the back panel.

Connect the kW 500’s TAPE input sockets

to the line output of your tape recorder,

and kW 500’s TAPE RECORD output

sockets to the line input sockets of the tape

deck.

OUTPUT CONNECTIONS

Connect your loudspeakers to the terminals

on the back panel marked as LEFT and

RIGHT SPEAKER outputs.

kW 500 Integrated Amplifier Instructions for use Page 8 of 10

Issue 2: Sept 2004

OPERATION

STARTING . . . .

Press the POWER button on the front panel

of the kW 500 power supply unit. The blue

LED above the button should now light.

The LEDs in the feet of the amplifier unit

will light red for about fifteen seconds indi-

cating that all audio outputs from the unit

are muted. Feet illumination then fades

over approximately fifteen seconds to

amber, indicating that output is no longer

muted, and that your kW 500 amplifier is

now ready for use. However, after a further

period of about 35 minutes, the colour fades

to blue, confirming that the amplifier has

fully warmed up.

Unless using your amplifier for off-tape

monitoring (see paragraph opposite )

ensure that the TAPE MONITOR button

has not been pressed accidently, as other-

wise no sound will be heard through the

speakers.

Select the required audio input source by

pressing an appropriate function button on

the front panel, or remote control. Now

adjust the volume control to obtain the pre-

ferred sound level.

OVERLOAD PROTECTION

If for any reason, speaker output power of

your kW 500 is excessive, for example at

very high volume setting or due to wrong

load impedance, an overload protection cir-

cuit is activated. The motorised volume

control will be turned down automatically,

and the four illuminated feet will change

colour to violet for about five seconds, or

until the problem is removed.

TAPE RECORDING

To record, simply select the required source

with the input selector button on the front

panel or remote control. This source will

now be routed to the kW 500’s TAPE

RECORD output for recording by the

external tape deck. You will also be able to

hear the selected source through the loud-

speakers.

Note - adjustment of the volume control has

no effect on the recording level.

OFF TAPE MONITORING

The kW 500 Integrated amplifier has a sin-

gle tape circuit with facility for off-tape

monitoring with 3-head tape decks.

In conjunction with a 3-head cassette deck,

off-tape monitoring allows the user to com-

pare recorded sound with the original whilst

a recording is being made. To do this, first

select the required source in the normal way

and start recording.

The TAPE MONITOR button on the front

panel can now be used to switch between

the original source sound and the recorded

version, allowing direct comparison.

On some 3-head tape decks there is an addi-

tional ‘tape/source’ switch, which must be

in the ‘tape’ position for the above to work.

If in doubt, please refer to your tape deck

operating manual.

kW 500 Integrated Amplifier Instructions for use Page 9 of 10

Issue 2: Sept 2004

TROUBLESHOOTING

Basic problem-solving with an amplifier is similar to troubleshooting any other electrical or

electronic equipment. Always check the most obvious possible causes first. To give you a few

ideas of what to look for, check the following:

If none of these actions effect a cure, please contact your dealer, or an authorised Musical

Fidelity service agent. Remember, never open the case of the kW 500 Integrated amplifier

yourself, as this will invalidate the guarantee.

Problem Possible Cause Remedy

No power when POWER Mains plug not inserted Plug in securely

button is pressed fully into rear socket

No sound Tape monitor function has Switch off tape monitor

been selected

Mute funtion is still active Press the mute button

(feet LEDs are still red) again to cancel

Wrong connections between Check audio input lead

input sources and the kW 500 connections

amplifier

Speakers not connected, or Check speaker cables

incorrectly wired

Sound is not precise, lacking Speakers are connected out of Ensure speakers are

in bass and stereo image phase, i.e., connections to one connected correctly

speaker (+ and -) are reversed

kW 500 Integrated Amplifier Instructions for use Page 10 of 10

SPECIFICATIONS :

Issue 2: Sept 2004

Musical Fidelity reserves the right to make improvements which

may result in specification or feature changes without notice

Output: Voltage RMS: 63.9 Volts 20Hz to 20kHz

Voltage peak to peak: 180.6 Volts

Power: 510 Watts per channel into 8 Ohms (27dBW),

770 Watts per channel into 4 Ohms

Peak-to-peak output current: 160 Amps

Damping factor: > 200

Output devices per channel: 8

Pre-output impedance: 50 Ohms

Line inputs:

Harmonic distortion at 1kHz < 0.002% up to 90% power into 4 or 8 Ohms

Total harmonic distortion + noise, 20Hz to 20kHz < 0.007%

Signal / noise ratio > 102dB ‘A’-weighted

Input sensitivity for 350 Watts into 8 Ohms 330mV

Input impedance 220K Ohms

Overload margin 36dB

Channel separation > 70dB 20Hz to 20kHz

Frequency response 20Hz to 20kHz, +0, -0.0dB

20Hz to 60kHz, +0, -1.2dB

Phono input:

Frequency response reference

IEC RIAA - see graph....

Signal / noise ratio > 96dB ‘A’-weighted

Input sensitivity 2.5mV (moving magnet)

Input impedance 47k Ohms

Overload margin 29dB

kW 500

Dual Mono Integrated Amplifier

RIAA RESPONSE

-20

-15

-10

-5

16 32 63 125 250 500 1.2K 2.5K 5K 10K 20K

FREQUENCY

RIAA

PHONO

RIAA/IEC

Inputs: 5 pairs line level RCA connectors,

1 pair phono (moving magnet) RCA connectors Outputs: 2 amplifier channels via 2 pairs per

channel binding posts.

1 pair RCA audio pre-outputs controlled by

the volume setting

1 pair RCA tape record fixed line level output

Weight, main unit: 26.8 kg, 59 lbs unit only, unboxed

31.8 kg, 70.1 lbs in shipping carton

P.S.U: 18.3 kg, 40.3 lbs unit only, unboxed

21.3 kg, 47 lbs in shipping carton

Dimensions, main 483 mm, 19 inches wide

unit: 167 mm, 6.6 inches high including feet

470 mm, 18.5 inches deep including terminals

P.S.U: 364 mm, 14.4 inches wide

167 mm, 6.6 inches high including feet

278 mm, 11 inches deep including rear sockets

Standard accessories: IEC type mains lead,

Power supply leads, main (two)

Power supply lead for pre-amplifier

Remote control (universal type)

Two batteries (type SUM-4, AAA, LR03)

Power requirement: 100 / 115 / 230Volts AC 50 / 60Hz (factory pre-set),

1950 Watts maximum into 8 Ohms

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