CREATE TABLE table_20473 ("Headphone Model" TEXT, "Headphone Class" TEXT, "Driver-matched dB" TEXT, "Construction" TEXT, "Earpads" TEXT, "Termination" TEXT, "US MSRP" TEXT)

Which terminations correspond to a US MSRP of $49?
SELECT "Termination" FROM table_20473 WHERE "US MSRP" = '$49'
SELECT "Termination" FROM "table_20473" WHERE "US MSRP" = '$49'