Musical Fidelity A3.5 Bedienungsanleitung

Issue 3 : 14th April 2005 A3.5 Integrated Amplifier Instructions for use Page 1 of 10

DUAL MONO INTEGRATED AMPLIFIER

INSTRUCTIONS FOR USE

Thank you for purchasing the Musical Fidelity A3.5 Integrated amplifier.

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

reproduction.

Aesthetically, the A3.5 Integrated amplifier is a perfect match for the A3.5 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 3 : 14th April 2005 A3.5 Integrated Amplifier Instructions for use Page 2 of 10

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:

The A3.5 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.

Issue 3 : 14th April 2005 A3.5 Integrated Amplifier Instructions for use Page 3 of 10

GENERAL ADVICE

INSTALLATION PRECAUTIONS and USER INFORMATION

Your new A3.5 Integrated 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 A3.5 Integrated 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 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 A3.5 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 interference.

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

Issue 3 : 14th April 2005 A3.5 Integrated Amplifier Instructions for use Page 4 of 10

CONNECTIONS and FACILITIES

710

1 2 3 4568911 12

1Power on indicator LED

2POWER mains on/off switch

3Mute indicator LED

4Tape MONITOR button and LED

5CD input select button and LED

6TUNER input select button and LED

7Volume control

8AUXiliary 1input select button and LED

9AUXiliary 2input select button and LED

10 Infra Red Receiver window for remote control

11 Home Theatre DIRECT input select button

and LED – see page 6

12 TAPE input select button and LED

FRONT PANEL

REAR PANEL

13 RIGHT SPEAKER output terminals

14 LEFT SPEAKER output terminals

15 CD input sockets

16 TUNER input sockets

17 AUXiliary 1input sockets

18 AUXiliary 2input sockets

19 Home Theatre DIRECT input sockets - page 6

20 TAPE input sockets

21 TAPE RECord output sockets - see page 7

22 PRE-OUTput sockets – see page 6

13 14 IEC mains power

inlet socket

15 16 17 18 19 20 21 22

Issue 3 : 14th April 2005 A3.5 Integrated Amplifier Instructions for use Page 5 of 10

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, specific,

Musical Fidelity products, and have no effect on the A3.5 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.

Pressing the MUTE button disables the SPEAKER output and PRE-OUT sockets, but not does

not affect TAPE RECord output. A red MUTE LED on the front panel lights to show that the

amplifier is not producing power to the loudspeakers. 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.

(Amplifier function buttons only)

Issue 3 : 14th April 2005 A3.5 Integrated Amplifier Instructions for use Page 6 of 10

CONNECTIONS

All input, output and power connections should

be made with the mains power switched OFF.

INPUT CONNECTIONS

The A3.5 Integrated amplifier has five stereo

pairs of RCA “line level” input sockets

controlled by the internal volume setting.

They all have the same input sensitivity, and

are therefore suitable for use with any source

component having an output of at least 300mV.

The five sockets on the rear panel are marked

CD, TUNER, AUXiliary 1, AUXiliary 2and

TAPE, corresponding with function selector

buttons on the front panel.

However, the HT DIRECT sockets are

intended for home theatre use. When selected,

they are routed inside the A3.5 directly to the

power amplifier circuit, which is not controlled

by the volume adjustment.

Do not therefore connect these

sockets to a source without its own

volume control.

TAPE RECORDER CONNECTION

The A3.5 Integrated 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 amplifier's TAPE (input) sockets,

and the tape deck's line inputs are connected to

the amplifier’s TAPE RECord (output)

sockets.

PRE-AMPLIFIER OUTPUT

The A3.5 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

components separately, giving noticeable

improvement in clarity, imaging and bass

weight.

In this arrangement, typically the A3.5’s

speaker outputs are used to drive the

speaker’s “tweeter” (high audio frequencies),

and an external stereo amplifier drives the

“woofer” (low frequencies). The A3.5’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.

SPEAKER OUTPUT CONNECTIONS

Connect your loudspeakers to the terminals

on the back panel marked as LEFT and

RIGHT SPEAKER outputs.

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 3 : 14th April 2005 A3.5 Integrated Amplifier Instructions for use Page 7 of 10

OPERATION

STARTING . . . .

Press the POWER button on the front panel of

the A3.5 amplifier - the blue POWER LED

above the button will light indicating that the

unit is ready for use. However, for about five

seconds no sound will be heard from your

speakers, and the red MUTE LED near the

button will not 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 A3.5’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 3 : 14th April 2005 A3.5 Integrated Amplifier Instructions for use Page 8 of 10

PROBLEMS ?

Basic problem-solving with an 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 (see page 7)

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 A3.5

Check audio input lead

connections

Speakers not connected, or

incorrectly wired

Check speaker cables

Sound is not precise, lacking in

bass and stereo image

Speakers are connected out of

phase, i.e., connections to one

speaker (+ and -) are reversed

Ensure speakers are

connected correctly

Audio connector plug not fully

pushed in

Insert plug securely.

Hum

Connector cable is faulty Check that the cable outer

shield (screen) connection has

not become damaged or

detached inside the plug

Remote control does not work Amplifier’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 amplifier

Ensure there is no obstruction

between the remote control

and amplifier 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 A3.5 Integrated amplifier yourself, as this

will invalidate the guarantee.

Issue 3 : 14th April 2005 A3.5 Integrated Amplifier Instructions for use Page 9 of 10

A3.5 DUAL MONO

INTEGRATED AMPLIFIER .SPECIFICATIONS.

Output : Power : 150 Watts per channel into 8 Ohms (22dBW),

240 Watts per channel into 4 Ohms

Voltage, RMS : 34 Volts 20Hz to 20kHz

Voltage, Peak-to-peak : 96 Volts

Current peak-to-peak : 50 Amps

Damping factor : 142

Output devices per channel : 4

Pre-out impedance : 50 Ohms

Line inputs :

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

Signal / noise ratio : > 100dB ‘A’-weighted

Input sensitivity for 147 Watts into 8 Ohms : 282mV

Input impedance : 100k Ohms

Overload margin : 26dB

Channel separation : > 82dB typical

Frequency response : 20Hz to 20kHz, +0, -0.1dB

Home Theatre direct input sensitivity : 30dB gain (31.5 times) nominal

Inputs : 5 pairs line level RCA connectors,

1 pair direct power amplifier input RCA connectors for

Home Theatre use (not controlled by volume adjustment)

Outputs : 2 amplifier channels via 1 pair binding posts per channel

1 pair RCA audio outputs controlled by the volume,

1 pair RCA tape record fixed line level output.

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

450 Watts maximum into 8 Ohms, 36 Watts idle

Weight : 9.7 kg, 21.4 lbs unit only, unboxed

14.4 kg, 31.8 lbs in shipping carton

Dimensions : 440 mm, 17.3 inches wide

100 mm, 3.9 inches high including feet

395 mm, 15.6 inches deep including terminals

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

Remote control handset (A3.5 type, universal),

2 batteries size LR03 or AAA, manganese alkaline type

3.5mm stereo jack plug to two RCA plug audio lead (1metre) for

accessory connection (iPod, MP3 etc.)

Musical Fidelity reserves the right to make improvements which

may result in specification or feature changes without notice.

Issue 3 : 14th April 2005 A3.5 Integrated Amplifier Instructions for use Page 10 of 10

REVISION HISTORY

RELEASE DATE CHANGES

Issue 1

Issue 2 22nd March 2005 Update specifications

Issue 3 14th April 2005 Added revision history

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