Nagra EMP Portable Dual Microphone Preamplifier

Nagra EMP Portable Dual Microphone Preamplifier

Nagra EMP Portable Dual Microphone Preamplifier


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Nagra NAGRA-EMP overview

  • 1Description

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.

In the Box
Nagra EMP Portable Dual Microphone Preamplifier
  • Limited 1-Year Warranty
  • Table of Contents
    • 1Description

    Nagra NAGRA-EMP specs

    Analog Inputs 2 x Symmetrical XLR microphone (dynamic, +48 V phantom)
    Input Sensitivity 2.8, 10 and 30 mV/Pa selectable
    Limiter Selectable on microphone inputs, individual or in pairs
    Active at -9.5 dB FS, max +40 dB for -2 dBFS
    THD <0.15 % Mic, <0.01% line at 1 kHz
    Frequency Response 10 Hz - 48 kHz ± 0.5 dB
    Input Noise 0.88 µV (-119 dBm)
    Noise Figure 4 dB (measured ASA "A" loaded 200 â¦)
    Signal-to-Noise Ratio > 114 dB
    Input Level Adjustment 50 dB Mic
    Input Filters LFA (Vortex filtering), low cut
    External Power Hirose 4-pin connector (9 to 13 V, 3.5 W)
    Analog Output 2 x XLR 4.4 V max. , selectable 0 dBm, +6 dBm or +15 dBm
    Headphones Stereo 1/4" (6.3 mm) TRS jack 50 â¦
    File Type PCM BWF or MPEG 1 L II, 16-bit, 32 to 48 kHz, Mono/Stereo
    Memory Size 2 GB (Corresponds to 2 hours 53 minutes, PCM BWF 48 kHz stereo)
    USB Host Mini USB 2.0
    Power Supply Four NiMH AA batteries
    Power Consumption Approximately 2.8 W (two phantom mic. & record)
    Consumption Approximately 2.6 W (two phantom mic. & record)
    Approximately 1.5 W at 6 V (no phantom, no record)
    Autonomy Approximately 2 hours (two phantom mic. & record)
    Approximately 4 hours (no phantom, no record)
    Relative Humidity From 10% to 99% (non-condensing)
    Dimensions (W x H x D) 7.5 x 2.0 x 6.9" (190 x 50 x 175 mm)
    Weight 2.2 lb (1 kg) including batteries

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