San José, California (dpa) — After years of speculation, the time has come: the home speaker company Sonos has entered the headphone business with a debut model called the Ace. Sonos aims to compete in a market with many long-established rivals, primarily through the Ace’s sound quality and comfort. With a price of €499/$449, the US company is targeting the upper end of the market. When you hold the Sonos over-ear headphones in your hand, you can tell that they’ll sit comfortably on your head because of the generous padding on the large ear cups and the headband. The ear cups are made of light…