icon Audio Stereo 300 MKII Instruction Manual And Users Manual Download Page 8

 

Page 8 

7 Specification & Features 

(Typical conditions @ 235v 50Hz) 

  300B output valves  

  4x 6SN7 double triodes driver stage 

  Low, medium and Zero feedback options 

  Icon designed and manufactured Tertiary wound 

output transformers 

  Hand wired point to point components 

  No printed circuit board 

  Ceramic valve bases for low noise/leakage 

  32W maximum output 8 Ohms  

  Signal to noise level -88dB 

  Freq. response 20Hz -0.2dB to 20kHz -0.5db 8w 

  0.3% THD at 8 watts  

  Channel balance typically less than 0.1 dB 

  4 and 8 ohms output taps 

  Choke regulated power supply 

  Supplied valve cover 

  Audiophile quality metal film resistors 

  SCR Audiophile polypropylene audio caps 

  Optional Jensen copper foil upgrade 

  Japanese ALPS volume pot. 

  Rubicon/Nichichron power caps. 

  Internal wiring using PTFE silver plated cable 

  Valves carefully matched for best performance 

  Gold plated Input & speaker terminals  

  Inputs for CD, Tape, Tuner, Aux, iPhone 

  Record loop with monitor switch 

  140, 300, 790mv sensitivity options 

  230-240volts 50 Hz for EU and UK countries 

  117v 60Hz for USA Canada 

  50 W Standby 150w 0 signal. 235 Watts max  

  IEC SKT T3.15A (T5A 117V) fuse (with spare) 

  Internal HT fuse 250ma AS ceramic. (2x spares) 

  380W, 220H, 380D mm Amp overall 25kg 

  Carton= 55x53x38cm 30kg packed 

  IEC mains lead  

  Conforms to CE ROHS and WEEE where applicable 

Specification subject to change without notice.

 

 

*

RMS  watts

  Do  not  literally  exist!  But  this  figure  is  based  upon  the  RMS 

voltage  output  (V²/R) 

to  indicate  continuous  output  as  opposed  to  “peak” 

output which is mis-leading. 

*Triode

  a  simple  valve  with  only  3  elements,  this  gives  very  linear 

amplification. Many “pentode” (5 element) valves can also be wired to act as 
triode valves. 

 
 

 

 

Summary of Contents for Stereo 300 MKII

Page 1: ...tages employing the venerable 6SN7 CV181 giving an excellent combination of the best of vintage valve sound yet accurate and dynamic to suit modern speakers and recordings In order to get the best out...

Page 2: ...ernal wiring check Check Triode mode N A Run 24 hour test Check inputs tape monitor Output Valve Bias level mv Sound Quality Channel Balance Valve Microphony Valve Seating Hum level left right mv RF T...

Page 3: ...ndby switch into the down position The amplifier should now be working 300Bs do not glow you can only see this by looking down vertically inside the valve With the volume control set to minimum fully...

Page 4: ...this is personal taste Icon or your dealer will advise you As all speaker cables have losses keeping the speaker cables shorter than 10m will help You can either hard wire your cable to the amplifier...

Page 5: ...eft in the standby mode this will save power Do not leave the amplifier switched on 24 7 Your valves will be worn out in approximately nine months Never leave the amplifier switched on when unattended...

Page 6: ...dio 3 Hum Loop If the hum is only on one input you may have a hum loop caused by too many ground or earth connections A possible remedy for this is to use an interconnect which only has the screen con...

Page 7: ...nough this usually means the emission of the valve is too low Replacing the 300B Valves Important Do not attempt to change the 300Bs without reading these notes Failure to do so could be both dangerou...

Page 8: ...caps Internal wiring using PTFE silver plated cable Valves carefully matched for best performance Gold plated Input speaker terminals Inputs for CD Tape Tuner Aux iPhone Record loop with monitor swit...

Page 9: ...ioning 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 chang...

Page 10: ...n 2 Lift the cardboard box off 3 Remove the bottom packing first 4 Turn the unit the right way up and remove the top packing Please be careful not to damage the small switches on the front panel When...

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