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General Points - icon Audio BA2 MK II Instructions

Musical box valve line

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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. If damaged contact your
supplier.
2 Fit the valves if necessary.
This is easy as there is only one type of valve. Do not
push or pull the 6SN7s glass envelope, this could
cause the glass envelope to become detached from
the BA2 MKII causing irreparable damage to the
valve.
3. Connect the power supply.
power supply without connection to the BA2 as
this will damage the regulator.
4. Position the two units carefully in your system
far enough apart to eliminate noise or hum. The
power supply should be far away from other
sensitive units such as phono pre-amps, arms
etc. You may need to do this by "trial and error".
5 Connect between either your source unit or
between your pre and power amplifier. e.g. CD,
Tuner, Tape, Phono pre amp (if used) and power amp
etc via appropriate phono sockets and leads.
6 Connect to mains supply using the attached mains
lead to 230-240v supply. If it is necessary to
change to a different type of mains plug, the
welded plug must be removed and replaced with a
suitable type. Please then remove fuse and
dispose of carefully. (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
terminal.
7 SWITCH ON! The blue mains indicator should light
up and unit will take approximately 40 seconds to
start working. Both valves should have a visible
orange glow from each of the two cathode heaters.
With the volume control set to minimum (fully anti-
clockwise) there should be no sound coming from the
speakers except a barely discernable gentle hum.
8 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 15 mins.
9 Health and Safety. The valves when operating
have surface temperatures that are hot to the touch.
Keep out of reach of children and pets.
Under no circumstances operate with valves
removed!
Like all amplifiers there are potentially lethal high
voltages inside, which when switched off can take
up to 20 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.
Inputs & outputs
Many
problems
with
connecting leads which are usually either 'bad, or
Wrong connection'. So it's worth making sure that
QUICK SET UP GUIDE
Do not operate the
hi
fi
equipment
involve
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.

General points

Mobile phone 'breakthrough' is normal
A switch-off 'click' through the speakers is
normal.
Storage in damp conditions could permanently
damage transformers, contacts and other parts.
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.
Conversely
components are stressed more at switch on; therefore
do not switch on and off unnecessarily. Although the
amplifier should sound good within about 15
mins, like most hi fi units it can take up to an hour
to sound at its best and will take a couple of
months of regular use before it is 'run in' and
settled down.
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.
Always
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.
the
valves
and
other
clean
with
the
power
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