bipolar capacitors

[colors]

hi,
are there situations where i need to use a bipolar capacitor specifically, i mean can i always use unipolar capacitor only.

 

[MikeMl]

AC Motor starting capacitors must be rated for AC. Similarly, Power Factor compensating capacitors.

Most DC blocking, AC coupling, Bypass, Filter capacitors can be polarized.

 

[audioguru]

The capacitors in a loudspeaker crossover circuit must be bipolar because they pass AC, not DC.

 

[crutschow]

Generally capacitors used in any signal filter circuits should be bipolar since they carry AC, and are also usually available in a tighter tolerance, which is desirable to keep the filter frequency close to the designed value.