Premium headphones exist to block out the world for years, not months. You want a pair that handles daily commutes, long flights, and deep work without falling apart or losing battery health after a year.
Audio brands drop new models every fall, which drops prices on last year's flagship right around November. That previous generation usually gives you 95 percent of the tech for way less money.
Remember, a 0% intro APR is just a clock ticking, not free cash. If you still have a balance on the card when those 15 months end, regular interest hits whatever balance is left, which ruins the discount you got in November.