New.
                                                   Kit contains 14 electrolytic capacitors.
                                            All you need to recap  Sansui AU-9900 / AU-11000 amplifier driver board F-2583 / F-2580 .
                                           One of the most important board in your amplifier - it works for healthy life of your output transistors, amplifier  life expectancy and as a buffer between low and high power schematic cascades.
                                               
                                                                      SHORT PREVIEW.

All electrolytic capacitors have limit of life.  Normally it,s  5 -8 years depends of quality.  Chemical oxidation, drying  and evaporation oil inside , location on the PCB board, type of signals  and voltages they working with  and drop value - that is major factors what is  destroying them. Capacitors extremely important to any audio device . Yon  can,t  build or create audio device on this planet  not using them. 


                                                                              INSTRUCTION.

Pay attention on each capacitor replacement procedure  what you are doing.  Remember - they all have " plus'  and " minus' polarity. Wrong installation will cause malfunction of your audio unit.  After changing  2 -4 capacitors in series always check  unit functionality.  It will help you not doing installation mistake. Pay attention on capacitor value printed on its body. After you remove capacitor  from PCB board mark plus side on PCB board.   It will help you not reverse plus  and minus when you going to install new one. Do not use old stock capacitors  even if they are new.  After 15- 20  years in stock  EVEN NEW  most of them will loose value and dielectric parameters . They will work but not long time.
  Remember   -   50% of your sound quality  -  directly from your capacitors value  and quality .


                                                               GOOD LUCK  AND HAVE A NICE DAY !