icon Audio Stereo 40 MK IV KT88 Instruction Manual

icon Audio Stereo 40 MK IV KT88 Instruction Manual Manual pdf 1 page image

Page 1icon AudioInstruction Manual Covering:Stereo 40 MK IV KT88Contents1 Introduction & Final Inspection2 Quick Set Up Guide3 Connecting inputs & outputs4 Getting the best out of your amplifier5 Trouble Shooting6 Bias Checking & Valve Replacement7 Specifications8 Packing and Shipping1 IntroductionThank you for purchasing the Stereo 40 MK IV.This is the 4th incarnation of the Stereo 40. Firstintroduced in 2000 it has undergone manyrefinements and upgrades which make it one ofthe finest amplifiers in its class having very highresolution when used with high quality inputmaterial and loudspeakers.In order to get the best out of your amplifier,please read the enclosed notes. Even if you areexperienced with Hi Fi please read the ‘quick setup guide’. Should you be uncertain aboutanything to do with your amplifier please contactas Icon Audio or your agent for advice.Valve (or Tube) amplifiers do the same job as asolid state amplifier, but they do it differently andgenerally have a warmer, more textured sound.Your ears will have become accustomed to yourold amplifier, so it may take some hours beforeyour ears attune themselves to the new sound.Your source, loudspeakers and room acousticswill also affect the sound before it finally reachesyour ear. Some people find a small adjustment inre positioning their speakers can help too. Theweakest link will always affect the final resultswhen making judgements. Not all recordings are‘equal’! Therefore an amplifier which faithfullyreproduces the input signal will also reproduceimperfections in the tonal balance and therecording itself. Setting up and judgements shouldbe made with a ‘clean’ well balanced recording.The Stereo 40 MK IV is a push-pull Ultralinearstereo power amp, capable of running in eitherUltralinear or pure triode mode, using theexcellent KT88 valves in fixed bias. The driver andphase splitting is all triode. The pre-amp is a highquality ‘Passive’ circuit using silver audio cableand an ALPS volume control. It is sensitiveenough to be used with all modern sourceequipment having an output of 250mv or greater.Its simplicity coupled with point to point handwiring without the use of printed circuit boardsresults in an open euphoric sound that iswonderfully detailed and warm sounding.IMPORTANT!THIS MANUAL CONTAINSESSENTIAL HEALTH & SAFETYINFORMATION FOR YOU ANDYOUR AMPLIFIER. PLEASEREAD & KEEP SAFE ANDREFER TO IF NECESSARY