U-Turn Audio, founded by three Lexington High grads, is a few steps closer to bringing its affordable, sound-obsessed vinyl turntable to the mass market.

In March, the trio won a $2,500 Prototype Fund grant from Northeastern University’s Center for Research Innovation. Seven or eight prototypes later, the three friends are trying to raise the $60,000 needed to start manufacturing their Orbit turntable, which will retail for about $150, according to Bob Hertig, one of the company’s cofounders.