Have you considered joining some of the AV groups on LinkedIn ? You can promote your company, products and services on LinkedIn but best of all, for me, are the groups that you can join - especially Audio Visual groups. Here are some examples that I belong to - you can follow this link to get started
LinkedIn is easy to join as a personal membership and just as easy to then add your company details and products etc
You could start by following this link and taking it from there, if you are not a member sign-up, join some AV groups and add your company page and add some products and services
Good luck and please email me if you need any assistance, look forward to seeing you on LinkedIn, connect to us so that we can follow you