Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_1601027_2 (headphone_class VARCHAR, headphone_model VARCHAR)
### Question:
Name the number of headphone class for sr100
### Answer:
SELECT COUNT(headphone_class) FROM table_1601027_2 WHERE headphone_model = "SR100"