The graphic is a stylized equalizer display led display.
Let me know if you see potential in the designs and I'll be more than happy to update it for you. Thanks in advance for your time reviewing my submissions.
On entry #2, I recently saw another audio engineering company with a very similar logo. It had just one medium ball in the center and three small one on each side. It looks great but to close to something already out there. As for entry #3 I'm not really into that one, just not what I had in mind.