Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_41550 ( "Headphone Model" text, "Headphone Class" text, "Sensitivity (dB)" text, "Impedance (Ohms)" real, "Driver-matched dB" text, "Construction" text, "Earpads" text, "Termination" text, "Succeeded by" text )

### Question ###
What are the earpads of the headphone with a plastic construction, an unknown sensitivity, and was succeeded by sr325?

### Accurate SQL ###

SELECT "Earpads" FROM table_41550 WHERE "Construction" = 'plastic' AND "Sensitivity (dB)" = 'unknown' AND "Succeeded by" = 'sr325'