, which launched on September 11 in the UK, has been billed as the "iTunes for classical music lovers".
The site already has a database of more than 10,000 registered users, which Passionato said were mostly male (84%), with 50% aged over 40 and 35% aged over 55.
Rob Gotlieb, director of marketing and business development at Passionato, said: "Unanimis is perfectly placed to provide access to a huge network of brands that want to be associated with our highly valuable audience."
Unanimis's portfolio includes brands such as , , , , , and .
Regan Murray, head of commercial development at Unanimis, said: "Passionato is a very interesting client for us. Not many web-based companies have as their majority demographic the elusive male over-40s market."