I think it's reasonable to modify a $75 pair of headphones to make them world beaters. If $1500 headphones aren't world beaters out of the box, they should be returned with prejudice.
Bosch is serviced by sears, and Houston is one of the largest cities in the country.
That said, check consumer reports, maybe their record is different than it was when I bought last, 6 years ago. Sometimes companies get worse.