I have an idea for an audio product what should I do?

Paul McGowan of PS Audio is a good ear for advice. Like deadhead1000 said, you need to do the preliminaries first. Good luck.

@deadhead1000

@designsfx

Thanks a bunch for sending me in the right direction! 

So you haven't built a prototype or proof of concept?  That might be a good first step.

If you do not understand the technology, or the market, and the market is fairly mature, then the likelihood that your idea is both intriguing and unique is low. Not zero, but low. First job is finding someone who can assess your idea, who both understands the technology and the market. Temper your expectations.

Agree with @carlsbad.

You need to build it, demonstrate it and then patent it if the feedback is good.

I'm guessing that it's some kind of bespoke networked active system.

Sometimes it is possible to find a niche in the market that the majors can't risk gambling R&D and tooling costs, but as you can imagine, it's never going to be easy.

It took Roy Gandy (Rega) many years of designing Rega Planar 3 prototypes (+ a hefty redundancy cheque from Ford, I think), before his idea took off.

If you were to contact an existing manufacturer, Rega might not be a bad place to start.