Hi all, The EVA is a bit quiet in my car. With the top up, I can hear it okay, but when the top is down, I can't really hear anything more than a faint tone. It's also a bit difficult to 'demo' it at car shows because people have to get pretty close to the dash to clearly hear it. I read some of these had a volume adjustment. Where might I look for that? Was it adjustable on the early cars?