Musical Fidelity A3.2 CR User manual

A3.2 CR Power Instructions for Use Page 1of 7

Issue 1: April 2002

A3.2 CR

DUAL MONO POWER AMPLIFIER

INSTRUCTIONS FOR USE

Thank you for purchasing the Musical Fidelity A3.2 CR Power Amplifier.

Used properly and carefully, it should give you many

years of outstanding musical reproduction.

Æsthetically, the A3.2 CR power amplifier is a perfect match

for the A3.2 CR preamplifier, A3.2 CD player and the A3.2 tuner.

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

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.

POWER

MUSICAL FIDELITY A3.2 DUAL MONO POWER AMPLIFIER

C R

A3.2 CR Power Instructions for Use Page 2of 7

Issue 1: April 2002

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 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

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 A3.2 CR 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 elec-

trical 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.

A3.2 CR Power Instructions for Use Page 3of 7

Issue 1: April 2002

GENERAL ADVICE

INSTALLATION PRECAUTIONS and USER INFORMATION

Your new A3.2 CR power amplifier 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 A3.2 CR 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 side heatsink fins 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. Refer all service work to an authorised Musical Fidelity agent.

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

There are fuses inside the A3.2 CR amplifier. In the unlikely event that one blows, refer the unit

to your audio dealer. Do NOT try to replace the fuse yourself as this will invalidate the war-

ranty.

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 A3.2 CR 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.

A3.2 CR Power Instructions for Use Page 4of 7

Issue 1: April 2002

CONNECTIONS AND

FACILITIES

RIGHT

INPUT RIGHT LOOP

OUTPUT LEFT LOOP

OUTPUT LEFT

INPUT

MUSICAL FIDELITY

A3.2 DUAL MONO POWER AMPLIFIER

C R

MANUFACTURED IN ENGLAND BY MUSICAL FIDELITY

THISAPPLIANCE

MUST BE

EARTHED

CAUTION

MOUNT UNIT ON SOLID SURFACE. DO NOT REMOVE SCREWS OR COVERS UNDER ANY CIRCUMSTANCES. NO USER SERVICEABLE

COMPONENTS INSIDE. REFER SERVICING TO QUALIFIED ENGINEER. SEE OWNERS MANUAL FOR FURTHER INFORMATION.

POWER CONSUMPTION

600W

RIGHT SPEAKER

OUTPUT LEFT SPEAKER

OUTPUT

IMPORTANT

50/60Hz

SERIAL NUMBER

1 2 3 4 5 6 7

Front panel layout

Back panel layout

1Right speaker outputs (two)

2Right input

3Right loop output (see page 5)

4Left loop output (see page 5)

5Left input

6Left speaker outputs (two)

7IEC mains inlet

POWER

MUSICAL FIDELITY A3.2 DUAL MONO POWER AMPLIFIER

C R

Power on

indicator LED Power on/off switch

A3.2 CR Power Instructions for Use Page 5of 7

All input, output and power connections

should be made with the mains power

switched OFF.

INPUT CONNECTIONS

The A3.2 CR Power amplifier can be used

with a preamplifier or any line level source

which has a volume control. We highly

recommend the matching A3.2 CR pream-

plifier available from Musical Fidelity.

Connect the left and right outputs from

your pre-amp or other line level source to

the RCA inputs on the back panel marked

as LEFT and RIGHT Line Inputs. The

corresponding LOOP OUTPUT sockets

are directly connected inside the unit to

duplicate the line inputs. This is to enable

onward connection to another amplifier, for

example when used for “bi-amplification”.

For the best results we recommend that

you use either Musical Fidelity X-LINX

“no-nonsense” cables for this connection or

the highly rated Nu-Vista interconnects

with integral RFI suppression. Various

lengths are available in the Nu-Vista inter-

connect range.

LOUDSPEAKER CONNECTIONS

Connect your loudspeakers to either of the

two pairs of loudspeaker terminals situated

on the back panel marked as LEFT and

RIGHT SPEAKER OUTPUT. The

wiring must be “in phase”, namely, the +

and -terminals must be connected to the

left and right speakers the same way round.

Note: - the combined load impedance

must not be less than 4 ohms.

Issue 1: April 2002

BEFORE SWITCHING ON. . . . .

Plug the accessory IEC mains lead into the

rear panel socket, then the other end into a

convenient wall outlet.

Turn the volume control on your preampli-

fier to minimum, and switch on its power.

OPERATION

Press the POWER switch on the front

panel of the A3.2 CR - the red POWER

LED will light to confirm that the unit is

ready for use.

Select the required audio input source on

your pre-amplifier, and advance the volume

control to obtain the preferred sound level.

CONNECTIONS and OPERATION

A3.2 CR Power Instructions for Use Page 6of 7

Issue 1: April 2002

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 A3.2 CR Power amplifier your-

self, as this will invalidate the guarantee.

Problem Possible Cause Remedy

No power when MAINS Mains plug not inserted Plug in securely

POWER switch is operated fully into rear socket

No sound Tape monitor function has Switch off tape monitor

been selected on the pre- at the pre-amplifier

amplifier

Wrong connections between Check audio input lead

pre-amplifier and the A3.2 CR connections

Speakers not connected, or Check speaker cables

incorrectly wired

The sound is not precise, Speakers are connected out of Ensure method of conn-

lacking bass and stereo phase, i.e. connections to one- ection is the same for left

image speaker (+ and -) are reversed and right speakers

A3.2 CR Power Instructions for Use Page 7of 7

Power output 130 Watts per channel into 8 Ohms

Total harmonic distortion < 0.01% 20Hz to 20kHz

Frequency response 10Hz to 20kHz ±0.1dB

Channel separation > 85dB 20Hz to 20kHz

Audio gain 30dB (31.5 times)

Input impedance 31K Ohm

Signal / noise ratio, reference full output > 105dB unweighted

> 120dB ‘A’- weighted

Power consumption 600 Watts maximum

Dimensions 440 mm wide

100 mm high including feet

395 mm deep including terminals

Power requirements 100 / 115 / 230V AC, 50 / 60Hz

(factory preset)

Weight 15 kg unit only, unboxed

17 kg in shipping carton

Standard accessories IEC type mains lead

Issue 1: April 2002

Musical Fidelity reserves the right to make improvements which may result in specification or feature changes without notice.

SPECIFICATIONS

A3.2 CR

POWER AMPLIFIER

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