Confirming an earlier-this-week report by TechCrunch, John MacFarlane, the chief executive of Sonos, told AllThingsD that the digital music system vendor has closed a third funding round, in which it has raised $25 million.

Sonos, which earlier raised $6 million in its second funding round in 2007, has thus far raised a total funding of $61 million, largely from angel investors.

According to reports, the new funding round at the Santa Barbara-based Sonos was led by Index Venture; and Mike Volpi - Index Ventures Partner and ex-Cisco executive - is joining the Sonos board of directors.

Founded in 2003, when Wi-Fi was at its peak, Sonos sells the somewhat-high-end wireless multi-room home music systems; with its most-economical package, which can stream music in two rooms, costing $999.00. The company has recently introduced a new $399-priced M5 model, which can be run from an iPhone.

The Sonos systems, controlled fully via Sonos’ iPhone apps, allow users to wirelessly play music either from their own collections or from online throughout their homes with minimal equipment.

Sonos would likely spend the new funding amount to expand its growth by exploring overseas avenues – especially in Chinese and Japanese markets, more so as only 35 percent of the company’s business comes from the US.