icon Audio Stereo 40 6AS7 Limited Edition User manual

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icon Audio
Instruction Manual Covering:
Stereo 40 6AS7 Limited Edition
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 Bias Checking & Valve Replacement
7 Specifications
8 Guarantee
9 Packing and Shipping
1 Introduction
Thank you for purchasing the Stereo 40 6AS7. 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
experienced with hi fi please read the ‘quick set
up guide’. Should you be uncertain about
anything to do with your amplifier please contact
us for advice.
Valve (or Tube) amplifiers do the same job as a
solid state amplifier, but they do it differently. And
whilst solid state specifications look good on
paper even quite modest valve amplifiers can
have a richer, more textured sound. Your ears will
have become accustomed to your old amplifier,
sometimes it may take some hours before your
ears attune themselves to the new sound.
Your source, loudspeakers and room acoustics
will also affect the sound before it finally reaches
your ear. Some people find a small adjustment in
re positioning their speakers can help too. The
weakest link will always affect the final results
when making judgements. 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. Setting up and judgements should
be made with a ‘clean’ well balanced recording.
What is the ST40 6AS7?
This amplifier is a push-pull pure triode integrated
amplifier, running in class a/b mode, using the
excellent 6AS7 valves in split 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
hand wiring without the use of printed circuit
boards results in an open euphoric sound that is
wonderfully detailed and warm sounding.
IMPORTANT!
THIS MANUAL CONTAINS
ESSENTIAL HEALTH & SAFETY
INFORMATION FOR YOU AND
YOUR AMPLIFIER. PLEASE
READ & KEEP SAFE AND
REFER TO IF NECESSARY

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2 Final Inspection - Your Guarantee of Quality
To assure you of optimum performance and reliability, this amplifier has passed our rigorous
final inspection and listening test by the Icon Audio team in Leicester. During which the final set
up and adjustments were made.
Date …./…./….
Model ……….
Amp Serial Number ……….
Customer ……………………………
Check amplifier finish ……….
Internal wiring check ……….
Check Triode mode ……….
Run min 6 hour 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 ……….
Mains voltage 115 / 230-240V
IEC Mains Fuse T1.6 Amp
Remote Control Function ……….
Sales invoice ……….
Bottom label ……….
Credit card receipt .………
Customer survey form .………
Bias meter ……….
Transformer Protection ……….
Upgrades:
Output valves ……....……….
1st Stage valve ……………….
Phase splitter valve ……………….
Rectifier valve ………………..
Mains lead ……….
Interconnects ……….
Signed off by ……………………….
Notes:

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IMPORTANT! READ THIS ALL THE WAY THROUGH FIRST
2 QUICK SET UP GUIDE
Box contents:
Amplifier, remote control, mains lead, manual,
bias meter. 4x 6AS7 2x 6SN7, 6SL7, 274B/GZ34
1 Unpack unit carefully and check that it is in
good condition. Transit damage must be reported
to Icon Audio within 3 days. It is important that you
keep packaging for warranty/service return.
2 If necessary fit the valves, or check that they
are firmly in place. (SEE DIAGRAM) The larger
four 6AS7s should be fitted first observing the
numbers 1,2,3,4 on the rear of the valve; this
corresponds with the four sockets from left to right
viewed from the front. This is essential as each
valve is ‘set up’ in this position. Do not push or
pull the output valves excessively by the
glass, this could cause the glass envelope to
become detached from the base, damaging the
valve. Note the orientation of the “spigot” in
the middle of the pins which lines up with the
sockets of all the valves.
Then fit single 274B/GZ34
Then fit the three smaller valves in the sockets
along the front valves noting the numbers. The
middle one is a 6SL7, the outside pair are 6SN7.
The 274B rectifier valve should be fitted in the
centre position.
3 Connect to source units, e.g. CD, Tuner,
Tape, Phono pre amp (if used) etc via appropriate
phono sockets.
4 Connect to speakers making sure that the
correct impedance (ohms) is chosen, (see back of
speakers). Most modern speakers are 6 ohms
which so this is not critical (see Ch 3), if you are
not sure start by using the 8 ohms (and “0”)
terminals. Don’t forget to get the correct polarity of
speaker cables. (See speaker connections
chapter). If ‘bi-wiring’ both ‘common’ should go to
the black terminal, and both ‘positive’ (or red)
should go to either 4 or 8 ohm terminals.
5 Connect to mains supply using supplied IEC
mains lead to 220/240v supply. If for some
reason the welded plug must be removed,
please remove fuse and dispose of
immediately. (As they can be a danger to
children if plugged in). The replacement plug
should be wired in the following way Brown to Live
terminal, Blue to Neutral terminal and
Green/Yellow to Earth.
6A Put the STANDBY switch in the “up”
position.
6B SWITCH ON! The front LED should light and
the valves will take approximately 60 seconds to
start working. All valves should have a visible
orange glow from the cathode heaters. After 60
seconds push the standby switch down. The
amplifier should now be working.
6C The Volume control will “re-set” on switch on
to aprox “9pm” position. There should be no
sound coming from the speakers except a barely
discernable gentle hum. If there are any
unexpected sounds coming from the speakers,
switch off and refer to the ‘Trouble Shooting’
section or contact your dealer or Icon Audio.
If you do not intend to use the amplifier for a few
hours you can switch into “standby”, when it will
use minimal power and be ready for use
“instantly”. In standby you may hear low distorted
sound from the speakers if you have a source
playing. This is normal, reduce the volume!
7 Your unit should now be functioning. If not
check wiring again and/Use selector/tape
monitor/volume to choose source program and
suitable listening volume. Do not operate at a high
volume for the first five minutes to allow the valves
to warm up properly.
8, Remote Control. If the batteries are OK (2x
AAA) the LED should light when any of the keys
are pressed. A little skill is needed in pointing and
pressing, as the unit has a motorised “pot” which
may not be as responsive as your TV.
Please note all these things are normal for
valve amplifiers:
A, Valves can get very hot, BEWARE!
B, The power transformer will get quite warm
C, The amplifier may smell slightly for a few weeks.
D, Mobile phone ‘breakthrough’ is normal.
E, Valves may make a ‘tinkling’ sound when
warming up and cooling down.
F, The volume control may sometimes appear to
sound ‘Scratchy’, this is not a fault!
G, Valves occasionally “Pop” or “Crackle”. If this is
regular problem it could be your CH
boiler/cooker/fridge etc. (see trouble shooting).
8 Health and Safety. The valves when operating
have high surface temperatures. Keep out of
reach of children and pets. The use of the
supplied guard is recommended in these
circumstances. Always unplug when making
adjustments. Like all amplifiers there are
potentially lethal high voltages inside (over
400v DC), which when switched off can take
twenty minutes to discharge! Do not remove
bottom panel unless you are a competent
engineer. There are no user serviceable parts
inside. Like other household electrical
appliances do not leave unattended whilst
switched on. Do not adjust the output valve grid
bias pre sets without reference to the manual.
Incorrect adjustment could cause the valves to
overheat, with resulting in damage to valves and
amplifier.
To maintain the best performance of the
amplifier you should check the bias of the
output valves from time to time (say twice a
year). Full details will be found in section 7.

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3 Connecting inputs & outputs
Many problems associated with electronic
equipment involves connecting leads, which are
usually either ‘BAD CONNECTION’ or a
‘WRONG CONNECTION’. So it’s worth making
sure that you have good connections and that
your leads are the right way round.
Inputs
The amplifier will work with any standard piece of
hi fi e.g. CD, Tuner, Tape Deck, Mini Disc, TV,
Video Recorder, DVD etc having an output of
250mv or more, to get full power.
If you wish to use a turntable you will need a
suitable phono pre-amp. Icon Audio or your dealer
can advise you. Our new all valve phono stage is
an ideal partner.
“H” & “L” sensitivity/Power Amplifier mode.
Located on the rear of the amplifier the High and
Low sensitivity switch has two functions. The
“High” setting should normally be used when used
as an integrated amplifier. The “Low” setting may
be used if the ST40 is used as a power amplifier
with a pre amplifier, as pre amplifiers generally
have a higher output. In this mode of operation it
is suggested that the volume control be fully
clockwise,(the volume control is then effectively
“out of circuit”) and volume be controlled on the
pre-amplifier for best results. The tape input will
provide the most direct signal path. If you have
too much gain Icon Audio can modify to suit your
requirements. The feedback switch may also be
used if you prefer a generally lower volume level.
Feedback. The sensitivity switch does not
attenuate the signal, but alters the gain by
adjusting the feedback within the amplifier. In “H”
the feedback is low, in “L” position there is zero
global feedback.
Connecting a tape deck/Recorder/Equaliser
The STEREO 40 will work with any tape deck
having suitable output, and it is possible to record
from any connected source using the terminals
marked ‘Pre-out’. The STEREO 40 has a ‘Tape
Monitor’ facility, which enables you to use a ‘three
head deck’ or an equalizer.
Some tape decks ‘Present a load’ to the amplifier
terminals, even when not in use, which can affect
sound quality. (You can do an audible check for
this by removing the plugs and listening for a
change). Therefore for best results do not leave
anything connected to “Rec out” unnecessarily.
Connecting loudspeakers
It is important to use good quality loudspeaker
cable. This should be relatively thick and muti-
stranded. i.e. QED ‘Original’ or better. Take care
to connect the correct polarity. The use of
‘Banana plugs’ or ‘spade’ connections will ensure
a good connection whilst minimising the risk of
‘shorts’.
In our experience valve amplifiers are more
tolerant of cables, therefore the benefits of very
‘exotic’ cables may be wasted! But this is personal
taste. Icon or your dealer will advise you.
As all cables have losses, keeping the speaker
cables short is best. It may be better and be
cheaper to re-arrange your room and use shorter
cables than to spend a fortune on longer cables!
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 helps). Be warned this amplifier
does not have an output protection device,
which would degrade the sound. So a
prolonged short due to strands of wire
touching could damage the valves.
Alternatively use good quality ‘banana’ plugs,
once fitted they are trouble free.
Speaker polarity. It is essential that you
observe the polarity of the terminals; they
must be the same for the left/right connections
at the amplifier end and at the loudspeaker
end. Otherwise the sound will be ‘out of phase’
with the sound stage ‘inside out’ with reduced
bass. If you are unable to check this or confirm
the polarity (e.g. if you have ‘built in’ wiring), try
the following; Connect the system up and play
some music with plenty of bass (e.g. dance
music), preferably in mono (FM tuners are usually
switchable to mono) and stand the speakers close
together. If correct you should hear plenty of bass,
if not reverse the terminals for one channel
only, either at the amp or speaker. You will now
hear more, or less bass. The higher bass output is
the correct setting to use. Another alternative is to
use a test disc. If you are ‘bi-wiring’ your speakers
use only two terminals, you must use only 4 or 8
ohms (plus “0” black terminal), not both, as this
will not load the amplifier properly.
The STEREO 40 is designed to work with full
range, medium to high efficiency having
impedance of 4 ohms to 8 ohms. Speakers having
efficiency of lower than 86db will have greater
difficulty in providing a high sound level. But this
will also depend upon individual speakers, room
size, type of music and positioning etc.
Speaker impedance. It is important to use the
correct speaker impedance terminals, as this will
give the best sound quality and power matching. If
using 15-ohm speakers use the 8-ohm
connections. If you are unsure or “6 ohms” or “4 to
8 ohms” is quoted; a rule of thumb guide is to try
both positions. The loudest being the best match.
Although your personal taste should be the final
deciding factor.
Do not connect to more than one pair of terminals
for each channel. If two pairs of speakers are
required to be connected, they must both be 8-
ohm and connected 4 ohm terminals. Contact
Icon Audio for more information. Damage could
be occur if care is not taken.

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4 How to get the best out of your amplifier
•Do not leave the amplifier switched on all the time. This is not necessary
•Do not switch off and on without a rest of 60 seconds (this could blow the internal 500ma AS fuses)
•Do not adjust the output valve grid bias without reading the procedure
•Do not operate the amplifier without loudspeakers connected
•Do not use valves other than listed as this could be dangerous and damaging to the amplifier
•Remember to check the bias about twice a year for best performance.
•Make sure the speakers are in phase.
•Use the best possible source material.
•Use efficient, well-designed speakers.
What is safe maximum volume?
The Stereo 40 6AS7 will run happily all day long at
maximum power; the valves are not stressed any
more at full power than at zero volume. Running into
gross distortion will however stress the whole
amplifier. To find the maximum safe volume, play full
range music and advance the volume until distortion
occurs, (this is normally between 12 and 3 o’clock on
the volume control) back off the volume control about
30 degrees, this is approximately full music power.
However this position will vary according to the level
and type of music and the output of the source unit.
For example CD players tend to be higher than say
tuners or phono stages.
Leaving the amplifier switched on
Do not leave the amplifier switched on 24/7. Your
valves will be worn out in approximately nine months!
Whilst the amplifier will sound at its best when it is
properly warmed up, there is no advantage leaving it
switched on when it is not in use. See (Standby
Switch). We would always advise that any item of
home electronics is switched off when not in use
Standby Switch
If the amplifier is not needed for a few hours, it can be
left in the “standby” state. This enables the valves to
be fully warmed and ready to use the instant you put
the standby switch down. In the “standby” position the
amplifier is only using about 50% of normal power. It
also enables a healthy cloud of electrons to build up
around the hot cathode. Also it allows the silver
“getter” inside the valve to “mop up” any gas that has
built up inside and therefore keep the vacuum “hard”
for best performance. There is no benefit to leaving
the ST40 on standby indefinitely. If not in use switch
off!
‘Burning in’
Although the amp should sound good within
about 10 mins it can take up to an hour to sound
at its best and will take several months of regular
use before it is fully ‘run in’.
Upgrading Valves!
Good quality new valves sound better, have good
performance and reliability. The upgrade valves
supplied with selected models are the result of
careful comparison with other makes. But beware
paying excessive amounts for “New Old Stock”,
second hand or “Fake/copy”, valves. At the time of
writing (07.2011) there are good stocks of Russian,
Chinese and US military valves (military number
6080) available. Svetlana and Sovtek are making
new 6AS7s.
Cabinet Care
To remove dust we suggest gentle brushing of the
polished stainless steel cabinet with a soft
paintbrush. Other marks can usually be removed
with a damp cloth. The Perspex valve cover may
need a gentle wipe with soapy water and drying with
a duster. On no account use anything wet on the
amplifier, and always clean with the power
disconnected.
5 Trouble Shooting
Amplifier Dead
Check the amp mains fuse in the small drawer in the IEC
mains socket at the back of the amplifier. To gain
access, remove the mains lead. The fuse is in a small
plastic drawer, which forms part of the socket assembly.
To open insert a flat bade screwdriver or similar and
prise open. The fuse in use is the innermost the outer
is a spare. Should the replacement fuse also blow there
is a fault. Replacements should be 1.6 Amp ‘anti-surge’.
Available from Icon Audio free! contact us and we will
post them to you.
The fuse in the UK wall plug should be a 3 or 5 amp
fuse, this should be checked if the amplifier fuse is OK.
If one channel only, has stopped working it is likely to be
one of the two internal left and right HT fuses. There are
2 spares inside. You should refer to your dealer or Icon
Audio if you suspect one of these to have blown. If this is
not possible you should disconnect power for 20 mins,
invert the amplifier on a soft surface and remove the
bottom cover (where the spares are located) and replace
if necessary. If the fuse blows again there is a fault.
Replacement fuses are 500ma AS (or T).
No sound
Have you selected the right input? Are the
connections OK? Is everything switched on? Are the
speakers connected?
Distorted sound.
Try another source; if sound improves then it’s
probably something wrong with the first source. If no
improvement try different speakers, if no
improvement could be an amplifier problem.
Hum Problems
If you experience hum, try disconnecting all inputs, if
hum persists this is probably an amplifier fault.
If not, identify which input is causing hum. Connect
one input at a time. A common cause is a ‘hum loop’
caused by having too many earths, and may be
identified by unplugging each input source from the
mains. One remedy for this is to use an interconnect
which only has the screen connected at one end.
Other causes of low-level hum can be from adjacent
equipment, so experiment with moving equipment
around to see if this makes the hum better or worse.

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Interference Problems
The amplifier design incorporates features and devices
which make it resistant to mains-born interference. But
some CH boilers/fridges/cookers etc can generate RF
(radio frequency) interference which travels through the
air (and walls). Although rare this can be very irritating.
Usually a simple cure by fitting a capacitor to the
offending unit will effect a cure (ask us).
One channel missing.
Usually ‘bad’ connection on either the input or the
speakers. Try swapping the connection over to establish
if the cause is:
(a) Input to the amp. Sound will move to the other
channel.
(b) Amplifier or speakers. Sound will not move.
Also see internal fuses above
Strange noises coming from speakers:
Turn volume to minimum on unused input, if problem
corrected either fault with source unit or with connection.
If noise persists, problem with amplifier.
If a whole output valve glows red (other than the heater),
often accompanied by a hum through the speakers,
switch off immediately, and refer to Icon Audio or a
service engineer, as this could be valve failure.
A valve that is lit up is not a guarantee that it is working
properly; conversely a valve that is not lit up will not be
working (usually cold to the touch).
Valve Replacement (see also section 7)
Valve life will depend upon such things as hours of use
and number of on/off cycles, Do not switch on and off
unnecessarily (see Standby). Also it is not good practice
to remove the valves unnecessarily as this can strain the
pins and cause tiny air 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 (hold the base when
removing, to prevent detaching the glass) numbering
them with a marker from left to right as you do so in
order that that may be replaced in the same position.
They should be well packed in cardboard & foam or
similar, and returned to Icon Audio for testing. (Valves
are very rugged if packed properly).
Mains Supply
This amplifier is hard wired to work on 230/240v ac. The
transformer may easily be re-configured for 110/120v ac.
Contact us for more information.
6. Bias Checking & Adjustment
The bias voltage for this amplifier is 330mv DC
The Stereo 40 6AS7 uses the ‘Split Bias’ method of
valve operation. This has the advantage of higher
power, lower feedback and cooler running. However
it is important that the bias is checked at least twice
a year using the supplied meter to ensure best
performance from the amplifier.
This is a safe procedure which involves measuring
0.33v/330mv in each of the four sockets next to each
6AS7 and adjusting if necessary. This need not be 100%
accuracy and minus 10% i.e. 300mv to 350mv will have
virtually no effect.
1, Tools you will need: The supplied meter or one set
to measure approx 2 or 3 volts DC, and a small flat
blade screwdriver. Adjustments are done at zero
volume with speakers connected. Run the amp for at
least 20 mins (if it is working correctly). Otherwise do
a rough adjustment and check later when the ST40 is
hot.
The Icon meter reads in mv (millivolt=1v/1000). So
0.33v will read “330mv”.
2, Connect: the black probe to the chassis ‘earth’ by
unscrewing the ‘0’ speaker terminal and tightening
the probe in the exposed hole. And the other in the
test socket adjacent to the valve on test. See pics..
Set the ‘Icon’ meter to 2000mv (2v) or the ‘black
mark’.
Making the ‘earth’ connection.
3, Checking: You should get a reading of 330mv if
the valve is working correctly. But bear in mind that
your mains voltage fluctuations can affect your
readings up to 10%. Check all valves, they should be
within about 10% of the ideal voltage.
4, Adjusting: If the reading is incorrect, set this by
using the bias adjuster in the centre. They are very
sensitive so adjust very carefully; use tiny turns of the
screw. If the reading appears a little unstable this is
normally due to mains fluctuations.
5, If one or more valves are showing erratic readings
or you cannot set the correct voltage, then that valve
is probably faulty or out of specification. If you are
unable to set the reading high enough this means the
emission of the valve is low.
Showing a probe reading 1st output valve
If you are unsure about any aspect of bias contact
your retailer, Icon Audio or a competent service
engineer. Icon Audio provides a free bias check and
“health check” for your amplifier and valves.

Page 8
Replacing the 6AS7 Valves
Important: Do not attempt to change the 6AS7s
without reading these notes. Failure to do so could
be both dangerous and damaging to the amplifier.
When replacing valves, it is important that you use a
“matched quad” or two matched pairs if possible.
Health & safety; High voltages are present 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: You should if possible check the
bias setting before you attempt to change the valve(s), in
order to familiarise your self with the procedure.
The safe way is to change and check one or two valves
at a time. Remove the first old valve and fit the
replacement. Switch on and measure bias, you should
be setting the reading for each valve to about 300mv
(0.3v), Do not allow the reading to go temporarily above
800mv. Don’t worry how low the reading goes this will
not cause any problem. Continue in the same way and fit
all four valves. Do final adjustment when the amplifier is
fully warmed up.
TIP:
6AS7 valves can take a long time to stabilise, in which
case set to a lower level of say 250mv and increase by
small degrees until the 330mv is not exceeded when the
amp is fully warmed up.
If all is well there should be no more than a barely
detectable hum from the speakers, and the amplifier
should sound OK when tested.
6, If you cannot set up the 300mv then the valve is
probably faulty, worn out or unsuitable.
If the valves are brand new, you will need to check again
after approximately 10 & 100 hours, after that only
occasionally or if you suspect a problem.
NOTE: If you are changing to a different brand of
valve, be ready to change the bias quickly, as the
difference in setting may be quite large.
7, VALVE TYPES: To avoid damage to the amplifier
and electric shock hazard you must use only output
valves marked 6AS7 (6080, Chinese 6N5, Russian
6H13), Driver valves marked 6SL7 (6N9/6H9/6188),
6SN7 (6N8/6H8/CV181) Or that you know to be direct
equivalents. Use only valves which you know to be new
or good condition and test the amplifier thoroughly
before resuming normal use.
DANGER!
THE ST40 6AS7 CAN ONLY USE THE 6AS7 VALVE.
(OR EQUIVALENT US 6080, Russian/China 6N5/6N13)
DO NOT USE ANY OTHER OUTPUT VALVE AS
DAMAGE WILL RESULT
8, Replacing the small valves:
6SL7 (centre) and 6SN7 valves. Neither of these
requires any set up procedure. It’s just ‘plug and play’,
although care should be taken when removing and
inserting not to break the centre spigot. (These valves
are similar with the same pin connection; accidental
wrong insertion would not cause damage).
Icon Audio are happy to check the valves/amp or re-
bias your amp free of charge.
9, 274B Rectifier. This should normally last
longer than the audio valves. Replacements may
be obtained from Icon Audio. Alternative valves
to use are GZ34, 5AR4, GU5.
*RMS watts Do not literally exist! But this figure is based upon the RMS
voltage output (V²/R).
*Push Pull is a very elegant way of virtually cancelling out non linear
distortion, noise and hum. Whilst dramatically increasing the power and
damping factor. In Class AB about 1/4 of the output is pure class A. Unlike
transistor designs there is NO crossover distortion before the amplifier
reaches full output.
7 Specification & Features
(Typical conditions @ 240v 50Hz)
•6AS7 output valves
•6SL7 double triodes for first stage
•6SN7 double triodes phase-splitter
•274B/GZ34/5AR4 full wave rectifier
•No feedback used (integrated operation)
•Icon hand wound transformers with Tertiary
winding. 5Ω cathode resistance
•Hand wired point to point components
•No printed circuit board
•No tag board
•Ceramic valve bases for low noise/leakage
•HT delay circuit to protect cathodes (optional)
•22w RMS each channel @ clipping
•Signal to noise level -90db
•Freq response 20-20kHz ±1db
•Power bandwidth 10hz-30khz
•0.1% THD at 10 watts
•4 and 8 ohms output taps
•Choke regulated power supply
•Supplied with attractive safety guard
•Audiophile quality metal film resistors
•Audiophile quality polypropylene audio caps
•Japanese ‘Blue’ ALPS volume pot.
•Rubicon/Nichichron power caps.
•Internal wiring using PTFE silver cable
•Valves carefully matched for best performance
•Gold plated Input & speaker terminals
•Inputs for CD, Tape, Tuner, Aux
•Tape monitor
•280mv sensitivity for full output (integrated)
•680mv sensitivity for full output (power amp mode)
•230/240volts, 76w SB, 185w Min, 260watts max
•1.6 amp AS rear fuse (with spare)
•Internal 2x 500ms AS (with spares)
•390W, 210H, 410D Amp overall 23kg
•Carton= 34x48x36cm 26kg packed
•IEC mains lead, (5amp fused)
•Conforms to CE ROHS and WEEE where applicable
Specification subject to change without notice.

Page 9
8Guarantee
In the UK the this product is guaranteed by UK law
for 12 months from date of purchase by the dealer
you purchased from (including Icon Audio if
purchased directly from us). Icon Audio are not
responsible for products purchased from other
dealers for repairs and service, for service under
warranty you should contact that dealer directly. If
your dealer no longer exists for any reason Icon
Audio are will assist you. For out of warranty service
you are strongly recommended to contact us directly
are as we are obviously expert in knowledge,
upgrades and have the original spares in stock.
OUTSIDE THE UK
Your dealer will be responsible for the warranty
(including Icon Audio if purchased directly from us).
Technical assistance is available either by email or
phone.
By their nature some components such as valves
have a limited life and therefore guaranteed by value
on a 12 month pro-rata basis.
All units are individually tested for performance for at
least twelve hours before despatch to you. In the
unlikely event that you believe the unit is not
functioning correctly, it may be helpful to contact us
first as we may be able to assist you. Then we would
request that you return the item to us for further
action.
This condition also applies to products bought from
Icon Audio outside the UK.
Products bought from dealers outside the UK will
have that countries applicable guarantee law applied.
You are advised to inform us of any change of
address or ownership in order that we may keep
you up to date of any upgrades or improvements.
Check our website.
Exclusions
Claims for any damage to either amplifiers or valves
must be reported within three days of receipt.
This amplifier is designed for normal domestic hi fi
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 Instructions
When you need to ship a product it is essential
that the original box and packing be used for
maximum protection.
Please do not write on box, but use removable
labels. If returning for service do not send the cover,
as this is easily damaged. We recommend that the
cover be sent separately as rough handling may
damage both the cover and amplifier cosmetics.
•Re-use the supplied plastic bag to keep the
amp clean and free from damp.
•The mains lead fits in a foam cut-out
underneath the amplifier.
•Insert the piece of cardboard between the
transformer cover and the valve guard;
this will prevent the valve guard
scratching the transformer paintwork.
•Valves should be removed, numbered and
packed in “bubblewrap” or similar for
protection inside the valve cover.
•If the amplifier is stored it is best kept in the
box, keep upright in dry conditions.
icon Audio (UK) Ltd
351 Aylestone Road Leicester LE2 8TA
[email protected] www.iconaudio.com
Phone [phone] [phone]
0107 V Gen Pr 21/03/2019