Upgrade a Pair of Mid-Range Headphones to an Audiophile-Worthy Pair

By Adam Dachis

The Sennheiser HD 555 headphones are great—so great that I’ve neglected to upgrade for many years. Thanks to a discovery by clever human being Mike Beauchamp, it turns out you can perform a free upgrade to these headphones and make them equal to their high-end counterparts.

Read more…

…read more

Source: Lifehacker