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UNPACKING 

 
Your amplifier should reach you in a substantive, protective carton.  On unpacking, 
please examine the unit carefully for signs of damage or prior use.  Check that all the 
front panel controls function mechanically. 
 
The following items should also be in the carton:- 
 

a)

 

4 loudspeaker plugs 

 2 reds 2 black 

b)

 

2 spare gold plated header links 

c)

 

1 pre-

paid owner’s Registration Card, the lower half of which should be 

completed and returned to ourselves. 

 
May we suggest that you retain the protective carton in the unlikely event of the 
Amplifier having to be returned to ourselves. 
 

INSTALLATION 

 
This is a class A/AB Amplifier and, therefore, the heatsinks will become quite warm 
when the Amplifier is in operation.  A free air-flow around the heatsinks is essential if the 
Amplifier is not to overheat. 

 
Do not

 site the Amplifier in direct sunlight. 

Do not

 box in unless adequate ventilation is provided. 

Do not

 cover the heatsink. 

 
CONNECTING TO THE MAINS SUPPLY 
 
Please check that the voltage rating on the back of the Amplifier is correct for your 
supply.  Connection to the mains varies for the country for which the amplifier is 
supplied.  In some countries the mains lead is terminated with a captive moulded mains 
plug.  These plugs will be two or three pin plugs to suit local conditions and regulations.  
 
Where the mains cable is not terminated with a captive mains plug these must be 
correctly connected to a two or three pin plug to ensure complete safety. 
The mains cable is colour coded as follows:- 
 
3 PIN 

BROWN 

LIVE 

 

BLUE 

NEUTRAL 

 

GREEN/YELLOW 

EARTH 

 
2 PIN 

BROWN OR BLACK 

LIVE 

 

BLUE 

NEUTRAL 

 
It is essential that the above colour codes are observed and that the voltage and frequency 
of supply conforms to the markings on the amplifier. 

Summary of Contents for A48III

Page 1: ...s and components With normal use and a little care it will bring you many years of sound enjoyment To obtain the best from the Amplifier s many features please read this booklet carefully and if you have any queries your dealer will be only too pleased to advise J E SUGDEN CO LTD VALLEY WORKS STATION LANE HECKMONDWIKE WEST YORKSHIRE WF16 0NF ...

Page 2: ...f the Amplifier is not to overheat Do not site the Amplifier in direct sunlight Do not box in unless adequate ventilation is provided Do not cover the heatsink CONNECTING TO THE MAINS SUPPLY Please check that the voltage rating on the back of the Amplifier is correct for your supply Connection to the mains varies for the country for which the amplifier is supplied In some countries the mains lead ...

Page 3: ...nnection difficulties are experienced your dealer can advise INPUTS FROM ANCILLARY EQUIPMENT EARTHING One of the most common problems with high performance audio equipment is an audible hum through the loudspeakers This can frequently be traced to the connections of ancillary equipment which is separately earthed via its own mains supply causing a hum loop Whilst we cannot recommend that earth con...

Page 4: ...evant position of small header units to alter the gain of the phono stage It is quite a simple task there is no soldering required or component changes If you have any problem please consult your dealer or the factory for advice The loading and sensitivity of the two types of input are stated at the end of the booklet The components and loadings have been chosen to meet the majority of cartridges ...

Page 5: ...r is dispatched from the factory with this switch in the stereo position as a standard stereo integrated amplifier The amplifier can be converted to a mono amplifier by moving the switch to the bridged position see later illustration When the switch is in the bridged position the output signal appears across the two red positive speaker terminals This is a double amplitude signal being the sum of ...

Page 6: ... three head machines with the push button pressed in as above and whilst recording monitoring of the post tape signal can be achieved i e Monitoring of the Phono Tuner etc which you wish to record can be listened to Selection PHONO on main selector Tape push button in will give you monitoring of the phono signal recorded VOLUME The volume control continuously adjusts the power delivered to the lou...

Page 7: ...useful aid if comparisons of speakers are to be carried out By releasing this switch the amplifier is disconnected from the outputs and the speakers can be connected or disconnected without risk to the unit even when the Amplifier itself is switched on POWER Pressing the power button will turn the Amplifier on or off at the same time illuminating the power on L E D FUSES Should a fuse blow this is...

Page 8: ...eved It is not permissible to operate a lower voltage set Amplifier on a higher mains output voltage eg DO NOT operate 220V Amplifiers on 240V ACCESS TO AMPLIFIER Access for service fuses adjustment of sensitivity adjustment of mains supply tappings may be obtained as follows 1 DISCONNECT ALL POWER LEADS AND INPUT LEADS CAUTION THIS IS ESSENTIAL FOR SAFETY 2 WITH A POSIDRIV SCREWDRIVER REMOVE THE ...

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