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9 Guarantee & Shipping 

 

Thank  you  for  purchasing  one  of  our  amplifiers.  We 
hope you will be pleased with it. 
 

This  amplifier  is  guaranteed  by  the  dealer  you 
purchased  from  for  12  months  from  the  date  of 
purchase  for  parts  and  labour,  excluding 
shipping.  Valves  are  consumables  and  therefore 
on a 12 months pro-rata  wear basis.  Please keep 
your  receipt  as  proof  of  purchase,  this  will  be 
needed.  

 
All units are individually tested for performance for at 
least six hours before despatch to you. In the unlikely 
event  that  you  believe  the  unit  is  not  functioning 
correctly,  it  may  be  helpful  to  contact  us  first  as  we 
may  be  able  to  assist  you.  Then  we  would  request 
that you return the item to us for further action. 
 
You  are  advised  to  inform  us  of  any  change  of 
address in order that we may keep you up to date of 
any upgrades or improvements. Check our website. 
 

Exclusions 

Claims for any damage to  either amplifiers or valves 
must be reported within three days of receipt. 
 
This  amplifier  is  designed  for  normal  domestic  hi  fi 
use.  It  is  not  guaranteed  for  commercial,  Public 

Address  use,  or  use  in  other  situations.  The 
guarantee  becomes  void  if  the  unit  has  been 
modified in any way not approved by Icon Audio. 
 

10 Packing Instructions 

It is essential that the original box and packing be 
kept  in  good  condition,  as  this  provides  vital 
protection  during  transit.  Please  do  not  write  on 
box, but use removable labels. 

Should the original 

box  and  packaging  be  lost  or  become  unusable  a 
repacking  charge  of  one  hundred  pounds  will  be 
made.  

 

Re-use  the  supplied  plastic  bag  to  keep  the 
amp clean and free from damp. 

 

The  mains  lead  fits  in  a  foam  cut-out 
underneath the amplifier. 

 

Insert the piece of cardboard between the 
transformer  cover  and  the  valve  guard; 
this  will  prevent  transformer  damage  to 
paintwork during shipping. 

 

Valves  should  be  removed,  numbered  and 
packed  in  “Bubblewrap”  or  similar  for 
protection inside the valve cover.  

 

If  the  amplifier  is  stored  in  the  box,  keep 
upright. 

 

 

icon Audio 

UK LTD

 

351 Aylestone Road Leicester  LE2 8TA 

www.iconaudio.co.uk 

Phone +44 (0) 116 244 0593 Cell +44 (0) 778 715 8791 

Fax 0116 244 0593 

2020-02-19 G version 

 
 
 

Summary of Contents for MB90

Page 1: ...sferred to a medium such as LP CD or FM before being played through your own source unit the amplifier and finally loudspeakers Your room acoustics will also affect the sound before it finally reaches...

Page 2: ...Run min 6 hour test Check input Output Valve Bias level v Sound Quality Channel Balance Valve Microphony Valve Seating Hum level mv RF Test LED brightness Serial No sticker and recorded Mains voltage...

Page 3: ...e amp volume control set to minimum there should be no sound coming from the speakers except a barely discernable gentle hum If there are any unpleasant sounds coming from the speakers switch off and...

Page 4: ...st together to avoid any spare strands touching anywhere else soldering the stands together helps Be warned this amplifier does not have an output protection device which would degrade the sound So a...

Page 5: ...than 24hrs We would always advise that any item of home electronics is switched off when unattended Burning in Although the amplifier should sound good within about 10 mins it can take up to an hour...

Page 6: ...e the valves the KT90s 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 T...

Page 7: ...brand new you will need to check again after approximately 10 100 hours after that only occasionally or if you suspect a problem 7 To avoid damage to the amplifier and electric shock hazard you must u...

Page 8: ...pt This amplifier is designed for normal domestic hi fi use It is not guaranteed for commercial Public Address use or use in other situations The guarantee becomes void if the unit has been modified i...

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