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Stereo 60 MK IV Integrated Amplifier
IMPORTANT!
THIS MANUAL CONTAINS
ESSENTIAL HEALTH & SAFETY
INFORMATION FOR YOU AND
YOUR AMPLIFIER. PLEASE
READ & KEEP SAFE AND
REFER TO IF NECESSARY
1 Introduction
2 Final inspection
3 Quick set-up guide
4 Connecting inputs & outputs
5 ST60 MK IV as a Power Amplifier
6 Getting the best out of your amplifier
Thank you for purchasing the Stereo 60 MK IV. A
great deal of care has been taken by our team in the
development, production and testing of this amplifier.
We are sure that you will hear the difference!
WHAT IS THE STEREO 60 MK IV?
Our biggest push-pull integrated amplifier. We wanted
create an valve amplifier technically as near perfect as
possible using modern design techniques.
To do this we have a generous power supply, low
distortion drive circuity designed around the new
KT150/120 valves and our high own high definition
low distortion LDT output transformers. Now in its
fourth incarnation the ST60 has been upgraded each
time to make it one of the finest high power integrated
amplifier available. In addition, we have incorporated
features like switchable TRIODE mode and adjustable
sensitivity well as 4 Ohm outputs to match a wide
range of operating conditions.
In "Ultralinear" mode the power is 85W x2 In the
vintage TRIODE mode which many prefer the output
is still a very usable 50W x2 with a slightly more
"mellow" presentation.
icon Audio
Instruction Manual Covering:
Stereo 60 MkIV Integrated Amplifier shown with upgraded driver valves
Contents
1 Introduction
7 Trouble Shooting
8 Bias Adjustment
9 Valve Replacement
10 Specifications
11 Guarantee
12 Packing Instructions
The pre-amp is a high quality 'Passive' circuit using
silver plated copper PTFE audio cable and an
ALPS volume control. It is sensitive enough to be
used with all modern source equipment. Its
simplicity coupled with point to point hand wiring
without the use of printed circuit board's results in
an open euphoric sound that is wonderfully detailed
and warm sounding.
The ST60 MK IV was specifically designed to get
the best out of the excellent KT150 valves.
A built in meter simplifies bias and valve condition.
Compatibility with the older KT88/6550 is retained
and the amplifier may be de-rated in order to use
these.
In order to get the best out of your amplifier,
please read the SET UP GUIDE first.
you are experienced with valve amplifiers. Should
you be uncertain about anything to do with your
amplifier please contact either your dealer or Icon
Audio for advice.
Even if
Page 1
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Summary of Contents for icon Audio Stereo 60 MK IV
- Page 1 1 Introduction The pre-amp is a high quality ‘Passive’ circuit using Thank you for purchasing the Stereo 60 MK IV. A great deal of care has been taken by our team in the silver plated copper PTFE audio cable and an development, production and testing of this amplifier.
- Page 2 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.
-
Page 3: Important Read This First
3 QUICK SET UP GUIDE “down” position. The amplifier should now be 1 Unpack unit carefully. Make sure that it is in good condition. If not report to Icon Audio. It is working. All valves should have a visible orange important... - Page 4 Connecting a tape deck which would degrade the sound. So a The STEREO 60 MK IV will work with any tape prolonged short due to strands of wire deck having suitable output and it is possible to...
- Page 5 What is safe maximum volume? 25x50%=12.5v 12.5 /8=19.5 Watts The Stereo 60 MK IV will run happily all day long In the case of 4 ohm speakers divide by 4 instead at undistorted volumes. The valves are hardly of 8. This figure is approximate as the impedance stressed any more at full power than at zero of any speaker will vary.
-
Page 6: Troubleshooting
It is not good practice fault. Check bias or refer to Icon Audio. to remove the valves unnecessarily as this can If not, identify which input is causing hum. -
Page 7: Bias Adjustment
8 Bias Adjustment 9 Replacing the Valves Icon Audio are happy to replace valves and check to This amplifier uses the technically superior “Fixed performance of your amplifier, and advise on the Bias”... -
Page 8: Specification & Features
72 Watts 0.5% • 4 and 8 ohms output taps • Japanese grain oriented transformer iron • Icon Audio Low Distortion output transformers • Choke regulated power supply • Supplied with attractive valve cover • 3 potted transformers to reduce transformer noise •... - Page 9 Outside the UK modified in any way not approved by Icon Audio. refer guarantees this amplifier for 12 months from the date of purchase for parts and labour.
- Page 10 Caution: This amplifier is very heavy! Lift the amplifier out of its packing by using the two “hand cut-outs” in the bottom packing near the transformers. Or you may find it easier to remove the unit using the following procedure: With the top packing in place, turn the box “upside down”...
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