Audioroot uPRE MKII Portable Battery Powered Stereo Microphone Preamp

Portable Battery Powered Stereo Microhpne Preamp with AES/SPDIF Digital Output

The Audioroot uPRE MKII is the successor of the uPRE microphone preamp which was first introduced in 2010. The new MKII’s electronic design benefits from many enhancements including a 24bits/192kHz digital output.

This unit is a small, lightweight, high quality microphone preamplifier designed for ENG/EFP or musical production. It can be operated with 2 x 9V batteries or an external power supply via a Hirose push-pull connector. It will add 2 mic inputs to your recorder thru analog and/or digital inputs. The wide range trims offers perfect control over audio level.

Features

• 2 Electronically balanced mic inputs via Switchcraft mini XLR
• High efficiency 48V Phantom for Mic Power on each channel
• 80 Hz 12dB/Oct LF Cut filter on both channels
• -50dB to +80dB input gain trims
• Stereo Link
• M/S Decoding – can be used as a mono mixer
• Unbalanced outputs via Switchcraft mini XLR5
• AES (default) or SPDIF 24bits/192kHz digital output
• Miniature 3 leds level indicator per channel
• Power / low battery indicator (13V threshold)
• Rugged hybrid polyamid/aluminum housing
• Anodized/engraved face plates
• 2 x 9V batteries or 9 – 18V external power supply (automatically switched)
• 5 hours typical battery autonomy with 2 Schoeps CMC6Ug and ADC ON
• 10 hours battery autonomy with dynamic microphones and ADC OFF
• Compatible with environnement friendly iPOWERUS lipo batteries
• Optional 100-240V power supply
• 130 x 85 x 30mm / 255 grams

• 2 XLR mic inputs cables
• 1 mini XLR stereo output cable (mini XLR5 to 2 x mini XLR3)
• 1 XLR3 AES output cable

Technical Specifications

• Input impedance / impédance d’entrée : > 5kohms
• Min gain : -50dB
• Max gain (Zsource = 50R, Zload =600ohms) : > 80dB
• Distorsion : 0.003% < 40dB gain / 0.005% @ 60dB gain
• Equivalent input noise EIN (bruit ramnené à l’entrée) : -128.8dBu @ gain max  (Zsource = 200Ohms)
• Bandwidth / bande passante (+/- 3 dB) : 10Hz – 70kHz
• Max ouput level / niveau de sortie max (Zload = 600R) : +17dBu
• Power consumption @ V=12V / 48V off / ADC off : 92mA
• Power consumption @ V=12V / 48V on / ADC off : 130mA
• Power consumption @ V=12V / 48V on / ADC on : 155mA
• Power consumption @ V=18V / 48V off / ADC off : 62mA
• Power consumption @ V=18V / 48V on / ADC off : 85mA
• Power consumption @ V=18V / 48V on / ADC on : 100mA