The Nagra EMP Portable Dual Microphone Preamplifier is a custom-built external stereo microphone preamplifier that can be directly powered from the Hirose connectors of the NAGRA VI, or can run on four AA batteries. Equipped with selectable sensitivities, limiters, phantom +48V powering, and vortex filters, this high quality preamplifier can be used in numerous recording environments.
The EMP is designed to give two additional preamplifier stages to the inputs of the NAGRA VI. All controls, such as audio limiters, filters, phantom power, and record are controlled from the front. The front panel, chassis, and features were designed using the experience of previous NAGRA recorders and render the Nagra EMP very user-friendly and comfortable to operate, even in harsh environmental conditions.
The unit has two analog inputs on XLR connectors, equipped with NAGRA-manufactured transformers offering an improvement of +6 dB in the noise floor when set to the 2 mV/Pa position (for dynamic microphones). These transformers are bypassed when using condenser microphones (10 and 30 mV/pa positions). It is also fitted with limiters, including a low cut filter and a powerful Vortex filter, which considerably improves recordings made in windy conditions.
In addition, a small two-track solid-state digital audio recorder is built-in. Equipped with a fixed 2GB flash memory, it offers a security back-up recording in-the-field. The recorder will offer about three hours of recording, and audio files can be transferred to a PC via the Mini USB port.