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1 Unpack unit carefully. Make sure that it is in good
condition. It is important that you keep packaging for
warranty/service return.
2 Fit the valves if necessary. Or if fitted check that
they
are
seated
properly.
replacement)
3 You may connect directly to your source unit
(e.g. CD player) or from the "Record Out" of your
amplifier.
4 Connect to mains supply using the attached mains
lead to 230/240v supply.
may be necessary to change to a different type of
mains plug, the welded plug must be removed
and replaced with a suitable type. Or use a
suitable "IEC" cable.
(As they can be a danger to children if
dispose of carefully.
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 terminal.
6 Connect your headphones and SWITCH ON!
The blue mains indicator should light up and unit will
take approximately 40 seconds to start working. All
valves should have a visible orange glow from the
cathode heaters. With the volume control set to
minimum (fully anti-clockwise) there should be no
sound coming from your headphones except a barely
discernable hum.
6a, Headphone Impedance
The right hand knob marked L M H and LS refer to
the matching impedance of your headphones and are
banded as follows:
Low
4-32 ohms
Med
32-250
High
250-1000
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.
The best sound quality will be when the unit has
warmed up for at least 20 mins.
8 Health and Safety. The valves when operating
have moderately high surface temperatures. Keep out
of reach of children and pets.
Under no circumstances operate with valves
removed!
Like all amplifiers there are potentially lethal
voltages inside (300v DC), which when switched
off can take up to 15 mins 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.
Connecting inputs & outputs
Many
problems
with
connecting leads which are usually either 'Bad, or
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.
QUICK SET UP GUIDE
(see
also
If you are outside the UK it
Please then remove fuse and
(nominally 8)
(nominally 100)
(nominally 600)
hi
fi
equipment
involve
Mobile phone 'breakthrough' is normal
A switch-off 'click' through the headphones is
normal.
valve
Storage in damp conditions could damage
transformers.
Connecting Leads
Use good quality connecting leads, which are no
longer than they need to be.
Leaving the amp switched on
People sometimes ask if the amp should be left
running 24/7 without switching off. 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. It is using electricity and valves have a
finite
life.
components are stressed more at switch on; therefore
do not switch on and off unnecessarily. Although the
amplifier should sound good within a few minutes
like most hi fi units it will take a couple of months
of regular use before it is 'run in'.
Cabinet Care
To remove dust from the cabinet and valves we
suggest gentle brushing with a soft paintbrush and a
duster. Finger marks can usually be removed with a
damp
cloth.
disconnected.
CAUTION – HEALTH & SAFETY!
When making any adjustments remember to
isolate from power supply, and remember that
high voltages can remain present inside for some
time after switch off.
Amplifier Dead
Check the 1amp mains fuse which is in the IEC mains
socket on the rear. Replacements should be 20mm
1Amp 'anti-surge' or "T" type. These are available
from Icon Audio should you have any difficulty.
The fuse in the mains plug should be a 3 or 5 amp
fuse, although unlikely, this should be checked if the
amplifier fuse is OK.
No sound
Have you selected the right input? Are the
connections OK? Is everything switched on? Are the
headphones connected?
Distorted sound.
Try another source; if sound improves then it's
probably something wrong with the first source. If no
improvement
improvement could be an amplifier problem.
Hum Problems
Excessive hum is generally caused problems external
to the HP8. For example by a poor grounding in the
signal lead, or a 'hum loop' caused by having too
many earths. This may be identified by unplugging
the input source from the mains whilst still connected
to the HP8, the hum may then disappear. One
remedy for this is to use an interconnect which only
has the screen connected at one end. Some
expensive interconnects are not screened so try with
an standard alternative. Other causes of low-level
General points
Conversely
the
valves
Always
clean
with
Trouble Shooting
try
different
headphones,
and
other
the
power
if
no
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