All the caps in X-FI is polarized cap rite? can swap the polarized cap with non-polarized cap or not?
If you decide replacing capacitors is something for you; you must have a supply or flux and know how it's used to begin thinking about this. You will want to replace with same voltage or higher, same uF or higher. Higher values will mean larger capacitors, non polar capacitors are supposedly nice for audio signals than standard polar. They usually quite large though significantly larger than their polar brother, where capacitors are mounted in close proximity this means it's oridinarily impossible to fit oversize capacitors such as using NP for their superior quality as upgrade from default polars, in this case upgrading the quality of the polar to say an optimal polar - Panasonic FC / FM, or Rubycon. In polarized capacitors the stripe is the negative terminal which goes on the shaded part of the board, install wrong way and it pops - this can be loud and cause permanent defness.