Donner EM2 – Professional In-Ear Monitor Amplifier for Stage Musicians

Donner EM2 is the upgraded version of the popular EM1, designed for professional use on stage, in the studio, or for practice. It features precision analog circuitry, expanded functionality (mono/stereo switch, input mixing, dual inputs/outputs), and a rugged metal housing. It’s the ideal stage partner for drummers, vocalists, keyboardists, and instrumentalists who demand reliable, high-quality sound monitoring.

Key Features

• Up to 12 hours of battery life – powered by a built-in 1000 mAh Li-Ion battery. Charges via Micro-USB Type B (5 V, 1 A). Full charge in about 4 hours.
• Dual inputs and outputs – independent XLR and 1/4" TRS inputs with locking connectors, mono/stereo switch, and input mixing – complete signal control in your hands.
• Analog circuit design – ultra-low noise (–82 dB A-weighted), THD&N of just 0.001%, 96 dB dynamic range – for clean, distortion-free sound.
• Automatic signal detection – EM2 switches between mono (balanced XLR) and stereo (unbalanced TRS) depending on the connected cable.
• 1/8" TRS headphone output – compatible with headphones from 8 to 250 Ω. Output impedance: 10 Ω.
• Solid, compact design – metal housing with belt clip, dimensions: 103.4 × 72.3 × 40.7 mm. Weight: 145 g.

Advanced Monitor Control

Donner EM2 includes professional-grade features typically found in much more expensive gear: dual inputs, signal mixing, mono/stereo switching, high output power, and rugged construction. It allows you to mix a metronome with a stage feed, control levels, and create your own monitor blend with ease – whether during rehearsals, gigs, or studio sessions.

Stage and Studio Use

The EM2 is the perfect solution for musicians who need consistent and customizable monitoring – whether on stage, in rehearsals, or during recording. It's an ideal choice for drummers playing to a click track, vocalists demanding clear mixes, and instrumentalists who perform in loud environments.

Technical Specifications

• 1/4" TRS input impedance: 10 kΩ
• XLR input impedance: 20 kΩ
• Headphone output impedance: 10 Ω
• Max input level: +2 dBu
• Max output power: 125 mW @ 32 Ω
• Dynamic range: 96 dB
• THD&N: 0.001%
• Noise: –82 dB (A-weighted)
• Current draw: 80 mA
• Battery: Li-Ion 1000 mAh
• Charging time: approx. 4 hours
• Dimensions: 103.4 × 72.3 × 40.7 mm
• Weight: 145 g

Materials and Build

The rugged aluminum casing protects the internal electronics from damage. Locking connectors ensure stable cable connections. The metal belt clip allows the unit to be securely attached to your clothing or gear, making it perfect for mobile musicians on stage.

What’s in the Box

• Donner EM2 unit
• Micro-USB charging cable
• 1/8" TRS to 2 × 1/4" TRS stereo cable
• User manual

Why Choose Donner EM2?

If you're looking for a professional-grade in-ear monitor amplifier that offers more than just the basics, the Donner EM2 is your answer. With durable construction, powerful output, and precise control features, it's ready for every stage, every rehearsal, and every session.