Then manufacturers need to be voting with their feet. A public trade show is not a gathering of the faithful to commiserate, it is a marketing vehicle. If the people running the shows are not marketing them, they're pretty useless. Are there any American shows that get good numbers?
Tim
That depends on what you mean by 'good numbers'? RMAF is usually relatively well-attended (especially with the Head-Fi CanJam in attendance) and is possibly the ideal balance - not so few attendees that you feel like you're in a ghost town, not so many that you can't spend time with the people who mean business. T.H.E. Show in Las Vegas was pretty sparsely populated, TBH. CES itself is (or at least should be) B2B so it doesn't really count. Others... I really have no experience of, so I can't comment.
Here in the UK, we have four main shows: Bristol and Manchester Sound & Vision, AudioWorld in March and the National Audio Show at the end of this month. The Bristol and Manchester shows are popular, in part because they are well-promoted locally and nationally and in part because companies sell equipment at discount, but even here the average age seems to be going up by 12 months every year. NAS 09 was well attended (because it was new), but numbers seemed to drop off significantly last year. We'll see what happens this year later this month. AudioWorld is not strongly attended.
The difficulty with manufacturers voting with their feet is where do they take those feet? Many manufacturers big and small have costed up other types of event that appeal to a wider public, and sums only work if you are selling tens of thousands of dollars worth of equipment per day. Even Munich is punishingly expensive for smaller or start-up brands, and it's peanuts next to something like The Ideal Home Show here in the UK. If you are a company turning over say $10m, you can't afford to blow $500k speculating on a single show, because unless it ultimately adds 10% to your client-base, it was probably $500k you could have spent elsewhere. You can spend $50k on a series of shows, however, even if those shows ultimately end up merely reiterating the company exists to those who already know you exist.
The other problem is you can market your pockets dry and still not substantially increase numbers. RMAF/CanJam is a telling environment for me. It's like two completely separate shows under the same roof. Periodically, someone under 40 rocks up into RMAF or someone over 60 wanders into CanJam, but mostly they soon turn back to their respective comfort zones, shuddering at 'what lies beyond'. If you were to try to promote RMAF to the wider CanJam audience, they wouldn't turn up, because even when it's there and free as a part of the CanJam experience, they don't turn up. And they are music loving gear enthusiasts with money to spend and an ability to spend large on good stuff. Worse, it's all too easy for your marketing to backfire - audiophile PR will always push the big names and big numbers, but to real people 'come and hear what a million dollar audio system sounds like' can end up being 'go visit the audio lunatic asylum. Remember - don't feed them and never put your hands through the bars.'