CREATE TABLE table_1397 ("Headphone Model" CLOB, "Headphone Class" CLOB, "Sensitivity  ( dB ) " CLOB, "Impedance  ( Ohms ) " FLOAT, "Driver-matched dB" CLOB, "Construction" CLOB, "Earpads" CLOB, "Termination" CLOB, "Succeeded by" CLOB)

Name the number of headphone class for sr100
SELECT COUNT("Headphone Class") FROM table_1397 WHERE "Headphone Model" = 'SR100'
SELECT COUNT("Headphone Class") FROM "table_1397" WHERE "Headphone Model" = 'SR100'