question: Which headphone models have a driver-matched DB of 0.1 and a US MSRP of $49?
answer: SELECT headphone_model FROM table_1601027_1 WHERE driver_matched_db = "0.1" AND us_msrp = "$49"
context: CREATE TABLE table_1601027_1 (headphone_model VARCHAR, driver_matched_db VARCHAR, us_msrp VARCHAR)