Musical Fidelity Stereo Amplifier A32 User Manual

A3.2  
DUAL MONO INTEGRATED AMPLIFIER  
MUSICAL FIDELITY A3.2 DUAL MONO INTEGRATED AMPLIFIER  
PHONO  
TUNER  
AUX 2  
MONITOR  
CD  
AUX 1  
TAPE  
I.R.R.  
POWER  
INSTRUCTIONS FOR USE  
Thank you for purchasing the Musical Fidelity A3.2 Integrated amplifier.  
Used properly and carefully, it should give you many years of outstanding  
musical reproduction.  
Æsthetically, the A3.2 Integrated amplifier is a perfect match for the  
A3.2 CD player and the A3.2 Tuner.  
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: March 2002  
A3.2 Integrated Amplifier  
Instructions for use Page 1 of 9  
 
GENERAL ADVICE  
INSTALLATION PRECAUTIONS and USER INFORMATION  
Your new A3.2 Integrated 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 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. 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 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 warranty.  
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 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.  
Issue 1: March 2002  
A3.2 Integrated Amplifier  
Instructions for use Page 3 of 9  
 
CONNECTIONS AND FACILITIES  
MUSICAL FIDELITY A3.2 DUAL MONO INTEGRATED AMPLIFIER  
PHONO  
TUNER  
AUX 2  
MONITOR  
CD  
AUX 1  
TAPE  
I.R.R.  
POWER  
1
2
3
4
5
6
7
8
9
10  
11  
Front panel layout  
Back panel layout  
1
Power on indicator LED  
POWER on/off switch  
Volume control with LED  
Infra Red Receiver for  
remote control  
PHONO input select button and  
LED  
CD input select button and LED  
TUNER input select button and  
12  
Right SPEAKER OUTPUT  
terminals  
Phono moving magnet /  
moving coil selection switch  
Phono earth terminal  
PHONO input sockets  
CD input sockets  
TUNER input sockets  
AUXILLIARY 1 input sockets  
AUXILLIARY 2 input sockets  
TAPE input sockets  
2
3
4
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
5
6
7
LED  
8
9
AUXILLIARY 1  
input select button and LED  
AUXILLIARY 2  
input select button and LED  
TAPE input select button and LED  
Tape MONITOR button and LED  
TAPE RECORD output sockets  
PRE-AMPLIFIER OUT sockets  
Left SPEAKER OUTPUT  
terminals  
10  
11  
24  
IEC mains power inlet  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
RIGHT SPEAKER OUTPUT  
LEFT SPEAKER OUTPUT  
PHONO  
CD  
TUNER  
AUX 1  
AUX  
2
TAPE  
TAPE REC PRE OUT  
MM MC  
CAUTION  
MUSICAL FIDELITY  
THIS APPLIANCE  
MUST BE  
EARTHED  
CC  
MOUNT UNIT ON SOLID SURFACE. DO NOT REMOVE SCREWS OR  
COVERS UNDER ANY CIRCUMSTANCES. NO USER SERVICEABLE  
A3.2 DUAL MONO INTEGRATED AMPLIFIER  
POWER CONSUMPTION 400W  
COMPONENTS INSIDE. REFER SERVICING TO QUALIFIED ENGINEER.  
SEE OWNERS MANUAL FER FURTHER INFORMATION.  
50/60Hz  
IMPORTANT  
MANUFACTURED IN ENGLAND BY MUSICAL FIDELITY  
Issue 1: March 2002  
A3.2 Integrated Amplifier  
Instructions for use Page 4 of 9  
 
REMOTE CONTROL  
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 A3.2 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 advance 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 blue LED in the volume control knob goes out. Press the MUTE button  
again to cancel mute function, and the blue LED will light again.  
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.  
TUNER input select  
PHONO pickup  
input select  
AUXILLIARY 1  
input select  
VOLUME (UP)  
CD input select  
VOLUME (DOWN)  
TAPE input select  
AUXILLIARY 2  
input select  
MUTE button  
Issue 1: March 2002  
A3.2 Integrated Amplifier  
Instructions for use Page 5 of 9  
 
CONNECTIONS  
All input, output and power connections  
should be made with the mains power  
switched OFF.  
Various lengths are available in the Nu-  
Vista interconnect range. Please contact  
your local dealer for more information.  
INPUT CONNECTIONS  
OUTPUT CONNECTIONS  
The A3.2 Integrated amplifier has one pair  
of phono inputs, which can be used either  
for moving magnet (MM) or moving coil  
(MC) pickups.  
Connect your loudspeakers to the terminals  
on the back panel marked as LEFT and  
RIGHT SPEAKER outputs.  
PRE-AMPLIFIER OUTPUT  
The phono input sensitivity requirement  
can be changed from MM to MC by press-  
ing the push-button switch located on the  
rear panel.  
Important - Do not operate the MM/MC  
switch with the volume control turned up.  
The A3.2 Integrated amplifier has its pre-  
amplifier output available from RCA sock-  
ets on the back panel marked PRE-OUT,  
and is controlled by the volume adjustment.  
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.  
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.  
The A3.2 amplifier also has five “line  
level” inputs which are electrically identi-  
cal, 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, TUNER, AUXIL-  
LIARY 1, AUXILLIARY 2, and TAPE,  
to correspond with function buttons on the  
front panel.  
In this arrangement, typically the A3.2’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 A3.2’s PRE OUT RCA sockets would  
therefore be connected to the input of the  
external “woofer” amplifier in this exam-  
ple.  
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.  
If you are in doubt about bi-amplification,  
please contact your dealer for advice.  
Connect the A3.2’s TAPE input sockets to  
the line output of your tape recorder, and  
A3.2’s TAPE RECORD output sockets to  
the line input sockets of the tape deck.  
BEFORE SWITCHING ON  
Plug the accessory IEC mains lead into the  
rear panel socket, then the other end into a  
wall outlet.  
For the best results we recommend using  
either Musical Fidelity X-LINX "no-non-  
sense" cables for this connection or the  
highly rated Nu-Vista leads with integral  
Turn the volume control on the front panel  
to minimum (anticlockwise).  
RFI suppression.  
(continued)  
Issue 1: March 2002  
 
A3.2 Integrated Amplifier  
Instructions for use Page 6 of 9  
OPERATION  
STARTING . . . .  
OFF TAPE MONITORING  
Press the POWER button on the A3.2  
amplifier - the red power LED on the front  
panel will light indicating that the unit is  
ready for use. However, for about five sec-  
onds no sound will be heard from your  
speakers, and the blue LED on the volume  
knob will not be lit, confirming initial mute  
action.  
The A3.2 amplifier has a single tape circuit  
with facilities 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.  
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.  
The MONITOR button on the front panel  
can now be used to switch between the orig-  
inal source sound and the recorded version,  
allowing direct comparison. The blue LED  
just above the monitor button is lit when the  
tape monitor function is operating, confirm-  
ing that the recorded sound is selected.  
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.  
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.  
TAPE RECORDING  
If in doubt, please refer to your tape deck  
operating manual.  
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 A3.2’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.  
Issue 1: March 2002  
A3.2 Integrated Amplifier  
Instructions for use Page 7 of 9  
 
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:  
Problem  
Possible Cause  
Remedy  
No power when POWER  
button is pressed  
Mains plug not inserted  
fully into rear socket  
Plug in securely  
No sound  
Tape monitor function has  
been selected  
Switch off tape monitor  
Wrong connections between  
input sources and the A3.2  
amplifier  
Check audio input lead  
connections  
Speakers not connected, or  
incorrectly wired  
Check speaker cables  
Sound is not precise, lacking Speakers are connected out of  
Ensure speakers are  
connected correctly  
in bass and stereo image  
phase, i.e., connections to one  
speaker (+ and -) are reversed  
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 Integrated amplifier your-  
self, as this will invalidate the guarantee.  
Issue 1: March 2002  
A3.2 Integrated Amplifier  
Instructions for use Page 8 of 9  
 
SPECIFICATIONS  
A3.2  
Dual Mono Integrated Amplifier  
Power output at 1kHz for 0.5% distortion:  
115 Watts per channel into 8 ohms  
< 0.007%  
Total harmonic distortion 1kHz:  
Frequency response  
10Hz to 20kHz ± 0.3dB  
> 85dB 20Hz to 20kHz  
300mV, 200k ohms  
Channel separation:  
Input sensitivity  
line inputs:  
phono input MM 3.5mV, 47k ohms  
phono input MC 350µV, 47k ohms  
Signal / noise ratio  
(ref.120 Watts, 8 ohms )  
line inputs:  
phono MM:  
phono MC:  
> 103dB ‘A’-weighted,  
> 95dB unweighted  
> 96dB ‘A’-weighted  
> 89dB unweghted  
> 88dB ‘A’-weighted  
> 82dB unweighted  
Power requirement:  
100 / 115 / 230Volts AC 50 / 60Hz  
(factory pre-set)  
Power consumption:  
Dimensions:  
400 Watts maximum  
440 mm wide  
95 mm high including feet  
400 mm deep including terminals and volume knob  
Weight:  
12.5kg unit only, unboxed  
14.5kg in shipping carton  
Standard accessories  
IEC type mains lead  
Remote control (universal)  
2 batteries (type SUM-4, AAA, LR03)  
Musical Fidelity reserves the right to make improvements which may result in  
specification or feature changes without notice  
Issue 3: March 2002  
 
A3.2 Integrated Amplifier  
Instructions for use Page 9 of 9  

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