Nagra Ares BB+

The Nagra EMP (Extenal Microphone Preamplifier)

Portable self-contained 2-channel microphone preamplifier for use with the NAGRA VI, other recorders or instandalone operation.

Features

XLR inputs for dynamic or +48V phantom powered microphones	Powered by 4 "AA" cells or 4 pin Hirose from the NAGRA VI
2 seperate audio limiters, vortex and low cut filters	Internal 2GB buffer for 16-bit security back-up
Headphone monitoring	Compact and Lightweight

Product description
The Nagra EMP is a stand-alone stereo microphone preamplifier. Using principally the same electronic circuits as the renowned preamplifiers of the Nagra VI, it runs of 4 AA batteries, or can be directly powered from the Hirose connectors of the NAGRA VI. Equipped with a selectable sensitivities, limiters, +48V phantom powering and vortex filters, this extremely high quality preamplifier can be used in numerous recording environments.

EMP recorder Driver: >

The Nagra EMP was designed to give two additional preamplifier stages to the inputs of the NAGRA VI, but can be used with any other recorder, to give Nagra-VI quality inputs. All principal controls such as audio limiters, filters, Phantom power, record and monitoring are controlled from the front panel.

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. Using its intenal 4 AA cells, it has a running time of approximately 4 hours. It is equipped with a Hirose connector allowing external power to be supplied from the NAGRA VI, or another (external) dc supply.

The Nagra EMP has two analogue inputs on XLR connectors on the rear panel, equipped with NAGRA manufactured transformers offering an improvement of +6 dB in the noise floor when set to the 2 mV/Pa (for dynamic microphones) position. These transformers are bypassed when using condenser microphones (10 and 30 mV/pa sensitivity positions)

Gangable audio limiters, a low cut filter and a powerful Vortex filter considerably improve recordings made in windy conditions.

In addition an internal 2-track flash based solid-state 16-bit digital audio back-up is built-in. Equipped with an internal 2 GB security back-up buffer, offering about 3 hours of recording that can be downloaded to a PC through the USB port.

Technical Specifications
Inputs
Analog Inputs			2 x symmetrical XLR Microphone (Dynamic, +48V phantom)
Mic. Input sensitivity			2.8, 10 and 30 mV/Pa selectable
Limiters			Selectable on inputs, individual or ganged. Active at -9.5 dBFS, Max +40dB for -2 dBFS
THD @ 1 kHz			< 0.15 % Mic
Frequency response			10 Hz - 48 kHz ± 0.5dB
Input noise with condenser mic			0.88 µV (-119 dBm)
Noise figure			4 dB (Measured ASA "A" weighted loaded 200Ω
Signal-to-noise retio			>114 dB
Input level adjustment range			50 dB Mic
Input filters			LFA (With vortex filtering), Low cut
Outputs
Headphone			6.5 mm stereo Jack connector
Line Output			2 x XLR 4.4V max, selectable 0 dBm, +6 dBm or +16 dBm

Recorder
File type			PCM BWF or MPEG1 layer II 16 bits, 32 kHz to 48 kHz Mono / Stereo
Memory size			2 GB (Corresponds to 2h 53mins of PCM 48 kHz stereo
Power supply
Internal batteries			4 x “AA” cells
Battery consumption			Approximately 2.6W (2 x phantom +48V, recording)
			Approximately 1.5W at 6V (No phantom, No recording)
Battery autonomy			Approximately 2 hours (2 phantom, recording)
			Approximately 4 hours (No phantom, No recording)
External power			4 pin Hirose (9 to 13V, 3.5W)
External consumption			Approximately 2.8W (2 phantom, recording)
Physical
Dimensions			190 x 50 x 175 mm (7.5 x 2 x 6.9")
Weight			1 kG (2.2 lbs) Including batteries
Relative humidity			From 10% to 99% non-condensing