Audio equipment maker Sonos is one of the largest employers and corporate tenants in Santa Barbara. (Sonos media photo)

In a rare financial disclosure, Santa Barbara audio gear firm Sonos has revealed that its 2013 revenue was $535 million and that total sales doubled during the past year.

The revenue figure was originally reported by the Associated Press and Bloomberg. The company verified the figure with the Business Times but declined to comment further. Sonos also disclosed that it would pre-release information about patent filings.

Sonos, founded by Santa Barbara entrepreneur John D. MacFarlane, has become a leader in wireless audio systems for the home. It gets rave reviews from audiophile magazines and it is closely watched by the industry.

The company made a splash on television with a high profile ad campaign during the National Football League season, including this year’s Superbowl.

The company has raised more than $125 million in venture capital and private equity over the years with major owners now including KKR and Index Ventures. The latest disclosures raised the possibility that Sonos, which raised private equity as an alternative to a public stock listing, might yet try for an IPO.

Sonos has been growing fast in the downtown Santa Barbara core; it now holds more square footage under lease than any other company in the city.

[Editor’s note: This story was updated at 3:56 p.m. to reflect the fact that Sonos confirmed the revenue figure with the Business Times.]