Violectric Niimbus US 5 PRO – High-End Headphone Amplifier with Preamp

The Niimbus US 5 PRO is a high-end headphone amplifier and fully featured preamplifier developed by the renowned German manufacturer Violectric. As the direct successor to the acclaimed US 4 and US 4+ models, it delivers unmatched sound quality, massive power, and wide compatibility – for both dynamic and planar headphones. With its exclusive technology and outstanding specs, the US 5 PRO is the perfect solution for demanding audiophiles and professional users alike.

Key features

• Extremely low self-noise – thanks to minimal internal gain.
• High internal voltage of 60 V – ideal for high-impedance headphones.
• High output power – up to 7000 mW at 50 Ω and 32 V RMS at 600 Ω.
• High damping factor – ensures full control over headphone drivers.
• 256-step relay attenuator – precise volume control with remote.

Maximum quality and flexibility in one unit

The US 5 PRO functions both as a powerful headphone amplifier and a full-featured stereo preamplifier. Users can independently switch headphone and line outputs. With balanced XLR and unbalanced RCA inputs, and three headphone outputs – XLR 4-pin, 4.4 mm Pentaconn, and 6.3 mm jack – it offers complete flexibility. The Pre-Gain adjustment from -18 to +24 dB ensures perfect signal alignment, whether for sensitive IEMs or power-hungry planar headphones.

Applications

Perfect for high-end headphone setups and as a central preamp in stereo systems, the US 5 PRO is ideal for mastering studios, professional audio workstations, and audiophile-grade home audio systems. With its immense power output, it drives even the most demanding planar magnetic or high-impedance headphones effortlessly.

Technical specifications

• Analog inputs: 2 × RCA (unbalanced), 1 × XLR (balanced)
• Headphone outputs: 1 × XLR 4-pin, 1 × 4.4 mm Pentaconn, 2 × 6.3 mm jack
• Line outputs: 1 × RCA, 1 × XLR; with ±12 dB level adjustment
• Pre-Gain: adjustable from −18 to +24 dB
• Amplifier output: 7000 mW @ 50 Ω, 32 V RMS @ 600 Ω
• Volume control: 256-step relay-based attenuator with motorized pot
• Power supply: 2 toroidal transformers, > 50,000 μF filtering capacity

Materials and build

Crafted from aluminum and steel, the housing reflects German precision engineering. The included solid-aluminum IR remote allows full control of volume, input/output selection, and mute. Every unit is hand-assembled in Germany using premium audiophile-grade components.

Included in the box

• 1 × Violectric Niimbus US 5 PRO
• 1 × IR remote control
• 1 × User manual

Summary

The Violectric Niimbus US 5 PRO stands at the top of its class – a reference-level headphone amplifier and preamp offering exceptional sound, massive power, and flexibility, all wrapped in superior build quality. It's a top-tier tool for audiophiles and professionals who accept no compromise.