CREATE TABLE table_41551 ("Headphone Model" TEXT, "Headphone Class" TEXT, "Sensitivity  ( dB ) " TEXT, "Impedance  ( Ohms ) " FLOAT, "Driver-matched dB" TEXT, "Construction" TEXT, "Earpads" TEXT, "Termination" TEXT, "Succeeded by" TEXT)

What is the headphone model which was succeeded by sr325?
SELECT "Headphone Model" FROM table_41551 WHERE "Succeeded by" = 'sr325'
SELECT "Headphone Model" FROM "table_41551" WHERE "Succeeded by" = 'sr325'