Musical Fidelity A5 CR Manual de usuario

Issue 1 : November 2004 A5 CR Preamplifier Instructions for use Page 1of 9

STEREO PREAMPLIFIER

INSTRUCTIONS FOR USE

Thank you for purchasing the Musical Fidelity A5 CR Preamplifier.

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

reproduction.

Aesthetically, the A5 CR Preamplifier is a perfect match for the

A5 CR Power and A5 CD player.

Together they form one of the finest hi-fi systems available.

Dust regularly with a soft duster 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.

Issue 1 : November 2004 A5 CR Preamplifier Instructions for use Page 2of 9

SAFETY INFORMATION

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 the 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 symbol:

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:

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.

Issue 1 : November 2004 A5 CR Preamplifier Instructions for use Page 3of 9

GENERAL ADVICE

INSTALLATION PRECAUTIONS and USER INFORMATION

Your new A5 CR Preamplifier is designed and built to provide trouble-free performance, 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 A5 CR Preamplifier 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, a flower vase

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 pre-amplifier is dangerous, and may cause electric shock or fire hazard.

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

Do not remove any covers or try to gain access to the inside. There are no internal adjustments 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 claim.

Dust regularly with a soft cloth 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 A5 CR Preamplifier 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 interference.

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

Issue 1 : November 2004 A5 CR Preamplifier Instructions for use Page 4of 9

CONNECTIONS and FACILITIES

7 10

1 2 3 4 5 6 8 9 11 12

FRONT PANEL

1 Power on indicator LED

2 POWER mains on/off switch

3 Mute indicator LED

4 Tape MONITOR button and LED

5 PHONO input select button and LED

6 CD input select button and LED

7 Volume control

8 Super Audio CD input select button and LED

trol

ton

e 6

9 TUNER input select button and L

10 Infra-red receiver window for remote con

11 Home Theatre DIRECT input select but

and LED – see pag

12 TAPE input select button and L

REAR PANEL

13 RIGHT OUTPUT RCA socket

14 Moving Magnet / Moving Coil

push-button selection switch – see page 6

15 PHONO input sockets

16 CD input sockets

17 Super Audio CD input sockets

Phono earth terminal

ets

e 6

ets

d 7

ket

18 TUNER input sock

19 Home Theatre DIRECT input sockets – see pag

20 TAPE playback input sock

21 TAPE RECord output sockets - see pages 6 an

22 LEFT OUTPUT RCA soc

IEC mains power inlet socket

113 14 5 6 7 8 9 0 1 22

11 1122

Issue 1 : November 2004 A5 CR Preamplifier Instructions for use Page 5of 9

REMOTE CONTROL

The blue buttons on the remote control enable main functions of the A5 CR preamplifier 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 this unit.

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.

Pressing the MUTE button disables the LEFT and RIGHT OUTPUT sockets, but not does not

effect TAPE RECord output. A red MUTE LED on the front panel lights to confirm that audio is

not being routed to your power amplifier. Pressing the MUTE button again cancels mute function,

and the red LED goes out.

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, size LR03 or AAA, manganese alkaline type.

Do not dispose of used batteries in a fire.

(Preamplifier function buttons only)

CD input select

PHONO pickup

input select

SACD input select

Home Theatre DIRECT

input select (see page 6)

VOLUME (up)

VOLUME (down)

TAPE MUTE

input select button

TUNER input select

Issue 1 : November 2004 A5 CR Preamplifier Instructions for use Page 6of 9

CONNECTIONS

All input, output and power connections should

be made with the mains power switched OFF.

INPUT CONNECTIONS

The A5 CR Preamplifier has one pair of phono

inputs, which can be used either for moving

magnet (MM) or moving coil (MC) pickups.

The phono input sensitivity requirement can be

changed from MM to MC by pressing the push-

button switch located on the rear panel.

Important - Do not operate the MM /MC switch

with the volume control turned up.

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.

(Note - this is not a safety earth).

The A5 CR Preamplifier also has four “line level”

inputs which are electrically identical, and

therefore suitable for use with any source

component having an output of at least 300mV.

Input sockets on the rear panel are marked CD,

SACD (Super Audio CD), TUNER and

TAPE, to correspond with function buttons on

the front panel.

The HT DIRECT sockets are intended for

home theatre use. When selected, they are

routed inside the A5 CR Preamplifier directly to

the preamplifier output, which is not controlled

by the volume adjustment.

Do not therefore connect these sockets to a

source without its own volume control.

PREAMPLIFIER OUTPUT

Left and right audio outputs are provided from

RCA sockets on the back panel, which are

controlled by the volume adjustment.

TAPE RECORDER CONNECTION

The A5 CR Preamplifier has a single tape circuit

with facilities for off-tape monitoring with 3-

head tape decks (see page 7).

The tape deck's left and right line outputs are

routed to the preamplifier's TAPE (input)

sockets, and the tape deck's line inputs are

connected to the preamplifier’s TAPE

RECord (output) sockets.

BEFORE SWITCHING ON . . . .

Plug the accessory IEC mains lead into the rear

panel socket, then the other end into a wall

outlet.

Turn the volume control on the front panel to

minimum (anticlockwise).

Issue 1 : November 2004 A5 CR Preamplifier Instructions for use Page 7of 9

OPERATION

STARTING . . . .

Press the POWER switch button on the front

panel of the A5 Preamplifier - the blue

POWER LED above the button will light

indicating that the unit is ready for use.

However, for about sixteen seconds no sound

will be heard from your speakers, and the red

MUTE LED near the button will be lit,

confirming initial mute action.

Unless using your amplifier for off-tape

monitoring (see paragraph opposite )

ensure that the TAPE MONITOR button has

not been pressed accidentally, as otherwise 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, and adjust the

volume control to obtain the preferred sound

level.

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 A5 CR Preamplifier’s TAPE

RECord output for recording by the external

tape deck. You will also be able to hear the

selected source through the loudspeakers.

Note - adjustment of the volume control has no

effect on the recording level.

OFF TAPE MONITORING

In conjunction with a 3-head cassette deck, off-

tape monitoring allows the user to compare

recorded sound with the original whilst a

recording is being made (see page 6 for

connection details). 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. The blue LED just

above the button is lit when the tape monitor

function is operating, confirming that the

recorded sound is selected.

On some 3-head tape decks there is an

additional “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.

Issue 1 : November 2004 A5 CR Preamplifier Instructions for use Page 8of 9

PROBLEMS?

Basic problem-solving with a pre-amplifier is similar to troubleshooting other electrical or

electronic equipment. Always check the most obvious possible causes first, such as the following

examples:

Problem Probable Cause Remedy

No power when POWER

button is pressed

Mains power plug is not fully

inserted into rear socket

Plug in securely

No sound Tape monitor function has

been selected

Switch off tape monitor

Mute function is still active

(mute LED is still on)

Press the MUTE button on the

remote control to cancel

Wrong connections between

input sources and the A5 CR

Preamplifier

Check audio input lead

connections

Hum Audio connector plug not fully

pushed in

Insert plug securely

Remote control does not work Preamplifier’s POWER switch

is set to off

Set switch to on

One or more batteries fitted the

wrong way round

Insert batteries correctly

Batteries are flat Change batteries – do not mix

old and new ones

Remote control is not pointed

directly towards the front panel

of the preamplifier

Ensure there is no obstruction

between the remote control and

preamplifier front

Remote control range has

greatly reduced

Batteries are running out Change batteries – do not mix

old and new ones

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 A5 CR Preamplifier yourself, as this will

invalidate the guarantee.

A5 CR .SPECIFICATIONS.

STEREO PREAMPLIFIER

Issue 1 : November 2004 A5 CR Preamplifier Instructions for use Page 9of 9

Output :

Voltage, RMS : 29 Volts 20Hz to 20kHz

Voltage, peak-to-peak : 84 Volts

Impedance : 50 Ohms

Frequency response 20Hz to 20kHz, ±0dB

Line inputs :

Total harmonic distortion + noise, 20Hz to 20kHz < 0.01%

Signal / noise ratio reference 1 Volt RMS output > 100dB ‘A’-weighted

Input sensitivity for 1 Volt output 240mV

Input impedance 220k Ohms

Gain at maximum volume 12.5dB (4.2 times)

Overload margin 31dB

Channel separation > 70dB typical

Home Theatre Direct input :

Input sensitivity Zero gain, not effected by volume control

Phono input :

Frequency response reference

-20.0

-15.0

-10.0

-5.0

0.0

5.0

10.0

15.0

20.0

20.0 31.5 50.0 80.0 125 200 315 500 1000 1600 2500 4000 6300 10000 16000

RIAA

PHONO

RIAA/IEC

PHONO RESPONSE

Frequency (Hz)

IEC RIAA - see graph . . . .

Signal / noise ratio ref.1 Volt RMS output > 94dB ‘A’-weighted moving magnet

> 88dB ‘A’-weighted moving coil

Input sensitivity for 1 Volt RMS output at 1kHz 2.5mV moving magnet

370µV moving coil

Input impedance 47k Ohms

Overload margin Moving magnet : 31.2dB,

Moving coil 30.9dB

Inputs : 4 pairs line level RCA connectors,

1 pair (home theatre direct) power amplifier input RCA connectors

1 pair phono RCA connectors

Outputs : 1 pair RCA main output controlled by the volume,

1 pair RCA tape record fixed line level output.

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

10 Watts maximum

Weight : 13.15 kg, 29 lbs unit only, unboxed Dimensions : 440 mm, 17.3 inches wide

18 kg, 39.5 lbs in shipping carton 125 mm, 4.9 inches high including feet

397 mm, 15.6 inches deep including terminals

Standard accessories : IEC type mains lead (10-Amp type),

remote control (A5 type - universal),

2 batteries size LR03 or AAA, manganese alkaline type

Musical Fidelity reserves the right to make improvements which

may result in specification or feature changes without notice

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