Below you can find logos, similar to the audi 3d.

Quantum3D 47 Quantum3D 47 vector
RealAudio RealAudio vector
CD DIGITAL AUDIO CD DIGITAL AUDIO  vector
Balanced Audio Technology Balanced Audio Technology vector
BOSS AUDIO BOSS AUDIO vector
Audi 3D Audi 3D  vector
Grundig Car Audio Grundig Car Audio vector
CROWN AUDIO 1 CROWN AUDIO 1 vector
Thule Audio Thule Audio vector
Audiobahn Audiobahn vector
Car Audio Car Audio vector
audio pro1 1 audio pro1 1 vector
COMPACT DISK AUDIO COMPACT DISK AUDIO vector
Quantum3D Quantum3D vector
Audi 272 Audi 272 vector