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IMPORTANT!
THIS MANUAL CONTAINS
ESSENTIAL HEALTH &
SAFETY INFORMATION FOR
YOU AND YOUR AMPLIFIER.
PLEASE READ & KEEP SAFE
AND REFER TO IF NECESSARY
Thank you for purchasing one of our amplifiers, a
lot of care has gone into the design, selection of
components and hand made production of this
amplifier. We are sure that you will hear the
difference.
The Stereo 20PP is a MKII of our earlier ST20 the
PP denotes "Push Pull" in contrast to our ST20SE
"Single Ended" design. It is an integrated stereo
amplifier using the excellent EL84 pentodes in
class A/B giving the first few important watts in
'Class A' then sliding into 'Class B' at higher
powers. The first stage is a 12AX7 double triode
(one ½ per channel) driving a 12AU7 phase
splitter. The simple design means the Stereo 20 is
capable of a smooth detailed illumination of you
recordings without harshness or listening fatigue.
Important improvements to the ST20PP are the
incorporation of a "proper" headphone socket,
which
utilises
dedicated
transformer to give the best possible match to
icon Audio
Stereo 20PP
Integrated Amplifier with Headphone Socket
Contents
1 Introduction & Final Inspection
6 Specifications
8 Packing
1 Introduction
windings
in
User Manual for
your headphones. The switch on the front allows
you to mute the loudspeaker output.
Also incorporated are our new "Low Distortion
Tertiary" output transformers.
Despite its moderate price and compact size,
with
the
loudspeakers the Stereo 20 is capable of
stunning performance!
When choosing loudspeakers you should aim for
as large as possible with the rated efficiency
above 90db. Smaller speakers need more power
and the bass output is lower..
We would like you to get the best out of our
amplifier. Please read the enclosed notes. Please
follow the 'quick set up guide'. Should you be
uncertain about anything to do with your STEREO
20 please contact your dealer or ourselves.
the
suitable
source
material
and
Page 1
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Summary of Contents for icon Audio Stereo 20PP
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Page 1: Table Of Contents
Also incorporated are our new “Low Distortion amplifier. We are sure that you will hear the Tertiary” output transformers. difference. Despite its moderate price and compact size, The Stereo 20PP is a MKII of our earlier ST20 the with suitable source material PP denotes “Push Pull”... - Page 2 Final Inspection This amplifier has been carefully checked, tested and final adjustments made by Icon Audio in Leicester. It has passed our rigorous listening test and final inspection to assure you of optimum performance and reliability. Date …./…./…. Model ……….
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Page 3: Quick Set Up Guide
The Russian EL84’s may not be refer to the ‘Trouble Shooting’ section or marked but are the larger four which go to the contact Icon Audio. rear. If your unit is fitted with the HT delay timer, operation will begin after the unit switches the 3 Connect to source units, e.g. -
Page 4: Connecting Inputs & Outputs
When using very efficient speakers (90+db) such your system sound ‘better’ than it actually is. It as Lowther Fostex or our own Icon Audio Full would be better and may be cheaper to re-arrange Range we are able to convert the ST20PP to pure... -
Page 5: How To Get The Best Out Of Your Amplifier
Icon Audio or a Hum Problems service engineer, as this could be valve failure. If you experience hum, try disconnecting all inputs, if hum persists this is probably an amplifier fault. -
Page 6: Valve Replacement
High quality polypropylene audio caps Service: Should you suspect a problem, you could Japanese ‘Blue’ ALPS volume pot. return the unit to Icon Audio for a periodic service or Nichicron/Rubicon power caps. return the valves for testing free of charge. You ...