Logo and Buisnesscard for Event Engineering Company needed

Hello Guys, I need a new Logo and Buisness Card Design for my Company. The company is doing sound, light, rigging and stage engineering for big events. You can use the colours black, blue and white. If you want you can use multiple blue tones. The name of the company is "Raumklang Berlin" and means sourround sound Berlin in German. The company slogan is: "event engineering excellence" both should be in the logo. please keep it simple. it should represent a company and not a playground. The Logo should show what we are doing and what's our services. You don't have to put all four elements inside. It's enought if it's either sound lightning stage or rigging. Or maybe two of them. Keep it simple and clear. I need the logo as jpg and psd. For web and print And the Buisnesscard as psd and pdf. only for print. to sort out and find the best matching designer for our need please make a mockup or a sample based on our needs. You can put your watermark on it before you get the project. that's ok thank you greets leon