N.R.G Ultra Capacitor improves in small and big stereo setup significantly.  It improves the control at low /high volume, separation ,dynamics and clarity . Another high quality Korea made product. 
 
It comes with 3 sizes : 
16 Farad
       Size : 103.5 x 61 x 83 mm
 
58 Farad  
      Size : 103.5 x 61 x 298 mm
 
100 Farad
       Size : 103.5 x 61 x 298 mm