uPRE-MKII microphone preamp

🎙️ Portable battery-powered stereo microphone preamp with 24bit/192kHz AES/SPDIF digital output

The uPRE MKII is the compact and upgraded successor to Audioroot’s original uPRE (2010), now featuring a redesigned electronic architecture with high-resolution 24bit/192kHz AES/SPDIF digital output for superior sound capture.

Engineered for ENG, EFP, and music production, this preamp combines professional-grade audio quality with a lightweight and rugged design, ideal for field use. Power it via 2 x 9V batteries 🔋 or a 9–18V external supply ⚡ (Hirose connector), and effortlessly expand your recorder’s capabilities with two mic inputs — analog or digital.

🔧 Key Features

• 🎚️ 2 electronically balanced mic inputs (Switchcraft mini XLR)

• ⚡ 48V phantom power on each channel (high efficiency)

• 🔊 Wide gain range: –50 dB to +80 dB

• 🚦 3-LED level meter per channel + 🔋 low battery indicator

• 🌀 80 Hz low-cut filter (12 dB/oct) on both channels

• 🔗 Stereo link + 🎛️ M/S decoding (mono mixer mode)

• 🎧 Unbalanced stereo output (mini XLR5)

• 💾 Digital output: AES (default) or SPDIF, 24bit/192kHz

• 🏋️♂️ Rugged build: Hybrid polyamide/aluminum housing

• 🌿 Compatible with iPOWERUS LiPo batteries

🔍 Technical Highlights

• 📥 Input impedance: > 5 kΩ

• 🎯 Distortion: 0.003% @ 40 dB gain

• 🔈 Frequency response: 10 Hz – 70 kHz

• 🔊 Max output level: +17 dBu

• 📏 Size: 130 x 85 x 30 mm

• ⚖️ Weight: 255 g

🔌 Power & Battery

• 🔋 Up to 10 hours with dynamic mics + ADC off

• 🔋 Approx. 5 hours with condenser mics + ADC on

• 🧠 Smart switching between battery and external supply

• ⚡ Recommended PSU (not included): MEAN WELL GE12I18-P1J

🎒 Optional uPRE MKII Cable Kit

• 🎤 2 x XLR mic input cables

• 🔄 1 x mini XLR5 to 2 x mini XLR3 stereo output cable

• 📡 1 x XLR3 AES digital output cable

📊 Comparison: uPRE MKII vs FEMTO

For any sound engineer or field recorder needing crystal-clear audio, digital versatility, and portability, the uPRE MKII is the ultimate preamp to carry in your kit.