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If not, Identify which input is causing hum, connect
one input at a time. Some phono plugs do not
contact the outside of the socket very well (even
audiophile leads!); you may need to crimp them
gently to get a better contact.
Another common cause is a 'hum loop' this is
caused by having to many earths, and may be
identified by unplugging each input source from
the mains. The remedy for this is to disconnect
the earth from the mains plug. In the case of a
welded plug it will be necessary to remove the
original and fit a replacement. 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.
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.
to the other channel.
(b) Amplifier or speakers.
move.
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 an 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.
Valve Replacement (see also section 7)
Valve life will depend upon such things as hours
of use and number of on/off cycles, the HT Delay
Circuit if fitted will extend the life of the valve by
not stressing the cathode when it is cold. 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
(the EL34's should be held by the base when
removing, to prevent damage) 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 for more information.
Sound will move
Sound
will
not
6 Specification & Features
(Typical conditions @ 240v 50Hz)
•
EL34 output valves or equivalents
•
12AX7 (ECC83) double triodes for first stage
•
12AT7 (ECC81) double triodes phase-splitter
•
Hand wired point to point components
•
No printed circuit board
•
No tag board
•
Ceramic valve bases for low noise/leakage
•
12AX7/T7 heaters floated at 60v to minimise
cathode leakage & noise.
•
HT delay circuit to protect cathodes (optional)
•
40 Watts RMS per channel Ultralinear
•
19 Watts RMS per channel Triode mode
•
Signal to noise level -89db
•
Freq response 20-20khz +or- 1db
•
Power bandwidth 20hz-20khz
•
0.5% THD at full output
•
4 and 8 ohms output taps
•
Japanese EI transformers
•
Supplied with attractive safety guard
•
Minimal feedback used
•
Ultralinear transformer
•
3 section transformer cover to minimise noise &
hum.
•
High quality metal film & wire wound resistors
•
High quality polypropylene audio caps
•
Japanese 'Blue' ALPS volume pot.
•
Black Gate/Rubicon power caps.
•
Internal wiring using silver gilt cable
•
Valves carefully matched for best performance
•
Polished stainless steel chassis
•
Gold plated Input & speaker terminals
•
Inputs for CD, Tape, Tuner, Aux
•
Tape monitor
•
250mv sensitivity for full output
•
230/240volts, 135watts
•
1.6 amp rear fuse (with spare)
•
320W, 250D, 180H, 15kg
•
IEC mains lead, (5amp fused)
•
CE certified
Specification subject to change without notice.
Page 6
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