Electro-Voice ELX-1 is a high-performance audio mixer, ideally suited for broadcast and production recording applications. The ELX-1 is compact, space-saving, and can be powered by ac line, internal batteries, or external dc source. Extensive rf filtering circuitry and shielding provide protection against rf interference. It can mount in a single rack space with an optional RM-1 rack mount kit or set on any surface. With its optimum circuit design, it delivers flat frequency response, low distortion, and low noise.