CREATE TABLE table_1601027_1 (headphone_model VARCHAR, driver_matched_db VARCHAR, us_msrp VARCHAR)

Which headphone models have a driver-matched DB of 0.1 and a US MSRP of $49?
SELECT headphone_model FROM table_1601027_1 WHERE driver_matched_db = "0.1" AND us_msrp = "$49"
SELECT "headphone_model" FROM "table_1601027_1" WHERE "$49" = "us_msrp" AND "0.1" = "driver_matched_db"