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icon Audio 

 

Stereo 40i

SE& ie

 

Valve Amplifiers

 

 

Contents 

 

1 Introduction & Final Inspection 

 

2 Quick Set Up Guide 

 

3 Connecting inputs & outputs 

 

4 Getting the best out of your 
amplifier 

 

5 Trouble Shooting 

 

6 Specifications 

 

7 Valve Replacement  

 

8 Guarantee 

 

9 Packing Instructions 

 

 

1 Introduction 

 

Thank you for purchasing a 

Stereo 40i

A great deal of care has been taken in the design, 
selection of components and production of this 
amplifier. We are sure that you will hear the 
difference. 

 

In order to get the best out of your amplifier, 
please read the enclosed notes. Even if you are 
not experienced with hi fi. 

We would recommend 

that everyone follow the ‘quick set up guide’. 

Should you be uncertain about anything to do with 
your 

Stereo 40i

 please contact us for 

advice. 
Hi fi reproduction is a long chain of events that 
includes the recording, editing, mixing etc, before 
being transferred to a medium such as LP, CD, or 
FM, before being played through your own source 
unit, the amplifier and finally loudspeakers.  
Your room acoustics will also affect the sound 
before it finally reaches your ear. Whilst the 
amplifier is arguably the most important part of a 
system, it is important to remember that the 
weakest link will always affect the final results 
when making judgements. And not all recordings 
are ‘equal’! Therefore an amplifier which faithfully 
reproduces the input signal will also reproduce 

imperfections in the tonal balance and the 
recording itself. Therefore setting up and 
judgements should be made with a ‘clean’ well 
balanced recording. 
The 

Stereo 40i 

is a push-pull Ultralinear 

stereo power amp, capable of running in either 
pentode or triode mode, using the excellent EL34 
valves and fixed bias mode. The driver and phase 
splitting is all triode. The pre-amp is a high quality 
‘Passive’ circuit using silver audio cable and an 
ALPS ‘blue’ volume control. It is sensitive enough 
to be used with all modern source equipment 
having an output of 250mv or greater. Its 
simplicity coupled with point to point wiring hand 
wiring without the use of printed circuit boards 
results in an open euphoric sound that is 
wonderfully detailed and warm sounding.  

This manual also covers the “

Special 

Edition” & “ie”

 models, where the tape 

monitor, triode switch & silver Teflon 
audio cable have been omitted. 

 

Summary of Contents for Stereo 40i

Page 1: ...ct the sound before it finally reaches your ear Whilst the amplifier is arguably the most important part of a system it is important to remember that the weakest link will always affect the final resu...

Page 2: ...our test Check inputs tape monitor Output Valve Bias level mv Sound Quality Channel Balance Valve Microphony Valve Seating Hum level left right mv RF Test LED brightness Serial No sticker and recorded...

Page 3: ...to minimum fully anti clockwise there should be no sound coming from the speakers except a barely discernable gentle hum If there are any unpleasant sounds coming from the speakers switch off and refe...

Page 4: ...s You can either hard wire your cable to the amplifier by baring enough cable to fit in the connector and twist together to avoid any spare strands touching anywhere else soldering the stands together...

Page 5: ...off unnecessarily We would always advise that any item of Hi Fi Video or TV is switched off when not in use Burning in Although the amp should sound good within about 10 mins it can take up to an hou...

Page 6: ...r leaks Service Should you suspect a problem you could return the unit to Icon Audio for a periodic service or return the valves for testing free of charge You should carefully remove the valves the E...

Page 7: ...ent inside the amplifier and on exposed valve sockets when valves are removed so take suitable care It is not necessary to remove the bottom cover Beware valves get hot in operation 5 Changing valves...

Page 8: ...use It is not guaranteed for commercial Public Address use or use in other situations The guarantee becomes void if the unit has been modified in any way not approved by Icon Audio 9 Packing Instruct...

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