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Page 9 

9 Guarantee 

 

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 or change of ownership 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. 

 

Send  the  valve  covers  and  valves  in  the 
separate  supplied  box.  See  above  for 
valve removal. 

 

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. 

 

Do  not  store  in  damp  conditions  as  the 
transformer windings will corrode. 

 

If  the  amplifiers  are  shipped  insurance  id 
desirable due to the high unit value. 

 

 

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 

2020-02-11 G version 

 
 

 

Summary of Contents for MB 845

Page 1: ...roduction is a long chain of events that includes the recording editing mixing etc before being transferred to a medium such as LP Digital etc before being played through your own source unit the ampl...

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

Page 3: ...Page 3...

Page 4: ...rminal and Green Yellow to Earth terminal 6 SWITCH ON The blue mains indicator should light up The 845s will glow bright yellow You will likely hear a humming noise for about 30 secs this is normal Af...

Page 5: ...ystem up and play some music with plenty of bass e g dance music preferably in mono FM tuners are usually switchable to mono and stand the speakers close together If correct you should hear plenty of...

Page 6: ...things around to eliminate or prove which component if the problem Left or right amplifier If both probably the source unit Try another source If one amplifier is distorted check the bias No bias read...

Page 7: ...to the valve on test Set the Icon meter to 2000mv or the black mark See pics Making the ve connection 3 Checking Bias You should get a reading of ideally 400mV if each valve is conducting correctly Bu...

Page 8: ...ise yourself with the procedure If changing all the 845s be ready to adjust the bias in order not to overload the power supply Don t worry how low the reading goes this will not cause damage Do final...

Page 9: ...omestic 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 Pa...

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