Musical Fidelity A1001 User Manual

A1001 CLASS A SUPER  
INTEGRATED AMPLIFIER  
INSTRUCTIONS FOR USE  
Thank you for purchasing the Musical Fidelity  
A1001 Class A Super Integrated Amplifier. Used  
properly and carefully, it should give you many  
years of outstanding musical reproduction.  
The A1001 has been designed for the very high-  
est possible sound quality allied to a natural tonal-  
ity that brings life and soul to all forms of music.  
We have invested much time and effort in the design  
of this unit, we sincerely hope you will be delighted  
with your purchase.  
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 anything in  
your audio system, please consult your dealer who  
is there to help and advise you.  
A1001  
Instructions For Use. Page 1  
CONNECTIONS AND FACILITIES  
3
1
2
4
5
6
BACK PANEL  
FRONT PANEL  
7
8
9
Right speaker outputs  
CD input  
Tuner input  
Aux 1 input  
Aux 2 input  
1
2
Power (on / off) button  
Tape / source select (tape  
monitor) button  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
3
4
5
6
Volume control  
Volume position & mute LED  
Source selector buttons  
Remote receiver lens  
Aux 3 input  
Tape input  
Tape record output  
Preamp output  
Left speaker outputs  
Right preamp & power amp link  
Left preamp & power amp link  
IEC type mains inlet  
7
8
9 10 11 12 13 14 15  
16  
17  
18  
19  
A1001  
Instructions For Use. Page 3  
INSTALLATION  
INSTALLATION PRECAUTIONS  
Your new A1001 is designed and built to provide trouble-free performance but  
as with all electronic devices it is necessary to observe a few precautions. Please  
ensure that you have complied with these before you connect any AC power to your  
amplifier. Retain this guide for future reference.  
þ
Heed all warnings on the back of  
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Do not use near water.  
the unit.  
Do not place the amplifier near  
þ
Place your A1001 where there is  
direct heat sources such as radiators  
or other equipment that produces  
heat.  
adequate ventilation.  
þ
Only connect the unit to a power  
supply of the type marked on the back  
of the unit.  
ý
Do not remove any covers or try  
to gain access to the inside. The war-  
ranty will be invalid if the unit has  
been tampered with. There are no  
user adjustments within. Refer all  
service work to an authorised Musical  
Fidelity agent.  
þ
Position the power supply lead  
and signal interconnect leads where  
they are not likely to be walked on or  
trapped by items placed on them.  
ý
There are fuses in the A1001. In  
the unlikely event that one blows, take  
your A1001 to your audio dealer. Do  
NOT try to replace the fuse yourself  
or you will invalidate the warranty.  
BEFORE YOU SWITCH ON  
You should make all connections to the A1001 before switching on.  
Follow this routine before you listen for the first time, and each time you  
change any connections.  
1
2
3
4
Check all the inputs and outputs to the A1001.  
Then check again.  
Turn the volume control to nil.  
Now you can switch on the power and carefully advance the volume to  
the level you want and enjoy the music.  
A1001  
Instructions For Use. Page 4  
USER INFORMATION  
THE A1001  
The A1001 CLASS A SUPER  
doubling the power of your amplifier.  
SWITCH ON  
When you switch on the A1001 the  
unit will initially be in a muted state for a  
few seconds to allow the circuits to stabi-  
lise and to prevent any switch-on thumps  
etc. The volume control position indicator  
LED will then light when the unit becomes  
active. Note - if you mute the A1001 with  
the remote control before you switch it off  
you will then need to un-mute the unit with  
the remote after switching on.  
INTEGRATED AMPLIFIER was  
conceived as a very powerful integrated  
amplifier of the highest quality, inter-  
nally structured as fully separate  
preamp and monobloc power amp  
stages. The separation of the pre and  
power-amp stages allow them to be  
fully optimised for their specific func-  
tions. In addition this ensures total  
freedom from intermodulation and other  
distortions and noise that can occur  
when these circuits are combined. The  
preamp and each power amp stage are  
built on separate PCBs with separate  
power supplies and a separate magneti-  
cally sheilded mains transformer each.  
By packaging the unit as an inte-  
grated amplifier we were then able to  
provide perfect interconnection between  
these stages, particularly as regards the  
crucial earth return currents, and re-  
move any need for potentially sound  
degrading interconnects whilst also  
giving a more compact amplifier solu-  
tion.  
CONNECTIONS  
All connections should be made  
with the power OFF.  
The A1001 has 6 line level inputs -  
CD, Tuner, Aux 1,2 and 3 and Tape. All  
inputs are electrically identical and are  
suitable for use with any source compo-  
nent with an output voltage in the hundreds  
of millivolts (mV). This includes CD play-  
ers, tuners, tape machines and the audio  
outputs of video recorders, televisions,  
DVD and LaserDisc players etc. Enthusi-  
asts who wish to use a turntable should  
purchase an external phono stage such as  
the Musical Fidelity X-LP. We recom-  
mend that you use good quality screened  
interconnects such as the Musical Fidelity  
X-LINX for all connections. Do not use  
un-screened interconnect cables as they  
have inferior performance and in some cir-  
cumstances can actually damage the unit.  
All signal circuitry in the A1001 is  
fully discrete, no I.C.s are used, all  
circuitry has been designed 'from the  
ground up' specifically for the A1001.  
LOUDSPEAKERS  
To get the best from your A1001  
for a realistic soundstage and full dy-  
namic range, use it with loudspeakers of  
a reasonable efficiency. An average  
rating for a loudspeaker these days is  
about 88dB. This should mean that for  
an input of 1 watt, measured at 1 metre  
distance, the sound output will be 88dB.  
This is actually a reasonably loud  
sound, and much daily listening will not  
use much more power than this. Note  
that changing to a pair of speakers with  
a rating of 91dB is equivalent to  
TAPE RECORDING  
The A1001 has a single tape circuit  
with facilities for off-tape monitoring with  
3-head cassette decks. Connection of your  
tape machine to the A1001 should be as  
follows. The tape machine's Tape/Line out-  
puts go to the A1001's 'Tape' input sock-  
ets.  
(continued overleaf)  
A1001  
Instructions For Use. Page 5  
USER INFORMATION  
The tape machine's Tape/Line inputs  
go to the A1001's 'Tape Record' output.  
To record, simply select the required  
PREAMP OUTPUT  
The A1001 has an additional active  
source with the source selector buttons on preamp output situated on the back panel.  
the front panel. The selected source will This provides extra flexibility for use in  
now be sent to the 'Tape Record' outputs  
for recording by the attached tape machine.  
multi-room or surround-sound systems etc.  
You will also be able to hear the se- REMOTE CONTROL & MUTE  
lected source through the loudspeakers.  
Note - you can adjust the listening level  
with the volume control without affecting  
the recording level.  
The A1001 is supplied with a  
remote control handset that can be used  
to select any input and increase or de-  
crease the volume by means of the  
TAPE RECORDING - OFF TAPE  
MONITORING  
motorised volume control. Additionally  
the remote handset has a 'Mute' button  
which when activated cuts off all outputs  
In conjunction with a 3-head cassette from the unit. In the 'mute' active state  
deck, off-tape monitoring allows the user the red LED position indicator in the  
to compare the recorded to original sound volume knob will turn off.  
whilst a recording is made. First select the  
required source in the normal way and start  
recording, now the Tape/Source select but-  
ton on the left-hand side of the front panel  
WARNING - heat  
Because the A1001 is strongly  
can be used to switch between Source (the biased into Class A operation it gives off  
source signal) and Tape (the recorded sig- heat through the slots in the lid.  
nal) allowing direct comparison. Note that  
the LED indicator lights when 'Tape' (the  
Never put anything on top of  
recorded signal) is selected. On some 3- your A1001.  
head cassette decks there is an additional  
'tape/source' switch on the cassette ma-  
chine itself which will need to be in the  
'tape' position for the above to work - if  
you are in any doubt consult your tape  
machine's manual.  
Always ensure that the unit has  
adequate ventilation.  
PREAMP / POWER AMP LINKS  
The A1001's preamp and power amp  
stages are linked by means of gold plated  
bars fitted between the 'Preamp Output' and  
'Power amp Input' sockets on the rear  
panel. By removing these links the preamp  
and power amp stages may be used sepa-  
rately. Alternatively a signal processor  
such as a surround-sound unit can then be  
connected between the preamp and power  
amp stages.  
A1001  
Instructions For Use. Page 6  
TROUBLESHOOTING  
Basic troubleshooting of an amplifier is similar to troubleshooting of 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  
Probable  
Cause  
Remedy  
No power when  
Mains plug not inserted  
correctly  
Plug in securely  
POWER is pressed  
No  
sound  
Volume control is set to  
minimum  
Turn up the volume  
Tape/Source selector (tape Press Tape monitor  
monitor) button is  
depressed  
button  
Preamp to power amp links Replace links or switch  
removed or surround  
processor (or other device  
in pre-power amp loop)  
switched off or muted  
on / un-mute as  
appropriate  
Unit muted (volume control Un-mute with remote  
position LED will be off)  
control (position LED  
should be on)  
Speakers are not  
Check speaker cables  
connected, or are  
connected incorrectly  
Sound is not precise, Speakers are connected out Make sure that both  
lacking in bass and  
stereo image  
of phase  
speakers  
are  
correctly  
connected  
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 A1001  
yourself, as this will invalidate the guarantee.  
A1001  
Instructions For Use. Page 7  
SPECIFICATIONS  
A1001 CLASS A SUPER INTEGRATED AMPLIFIER  
Power output  
200W RMS per channel into 8W  
400W RMS per channel into 4W  
10 Hz - 30kHz + 1dB  
< 0.06% 20Hz - 20kHz to full rated power  
< 0.003% @ 1kHz to full rated power  
> -91dB unweighted  
Frequency response  
THD  
S/N ratio  
> -96dB ‘A’ weighted  
Inputs  
6 x Line level  
Input sensitivity  
Power consumption  
Power requirement  
300mV  
1000W (maximum)  
100/115/230V AC 50/60Hz  
(Factory preset for country)  
475 x 164 x 540mm (W x H x D)  
Height includes feet, depth includes  
terminals and volume knob  
30 kgs  
Dimensions  
Weight  
Standard accesories  
1 x IEC type mains lead  
1 x A1001 remote control handset  
2 x batteries (AA, LR6, AM6)  
Musical Fidelity reserves the right to make improvements which may result in feature or  
specification changes without notice.  
A1001  
Instructions For Use. Page 8  
A1001-97-1  

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