Violectric Niimbus US 5 PRO Headphone Amplifier + Preamplifier

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The Niimbus US 5 PRO Headphone Amplifier by Violectric has a sophisticated preamp function to drive direct power amplifiers or active speakers in addition to your headphones.

Niimbus US 5 PRO is the improved successor to the famous Niimbus US 4 and US 4+ headphone amplifiers. The US 5 and US 5 PRO versions have the same brilliant technology, the US 5 PRO also offers a finely graduated volume control in 256 precise steps.

The sophisticated preamp function can drive direct power amplifiers or active speakers in addition to your headphones. This gives you two high-end devices in one.

The US 5 series has powerful, noise-free and perfect-sounding circuits to drive any dynamic and planar headphone in the best possible way. The headphone outputs and the rear line outputs can be activated/deactivated using a switch on the front.

For undisturbed listening pleasure, almost all functions can be controlled via the elegantly designed IR remote control, giving you access to the motorized volume control, mute, input selection, headphone and line-out control.

Thanks to its incomparable technology, the Niimbus US 5 PRO is one of the most powerful headphone amplifiers on the market.


  • Lowest Noise: Through a very small amount of internal gain. This makes the amplifier's self-generated noise inaudible.
  • High Output Voltage: Through 60 V internal operating voltage. Therefor ideally suited for high-impedance headphones deserving high output voltage swing.
  • High Output Power: Thanks to powerful amplifiers that offer far more power even the most demanding headphones would need. So, best suited for headphones with low impedances as well as planar (magnetostatic) headphones.
  • High Damping Factor: Due to lowest output impedance. Therefor the ideal match for difficult to drive headphones without negative side effects and with the guarantee for a uncompromising frequency response.


  • Perfect volume control in 256 steps via reed relay.
  • Remote control for input selection, output selection, volume, mute.
  • 3 analog stereo inputs, 2 x unbalanced via RCA, 1 x balanced via XLR.
  • Pre-gain of -18 to +24 dB, for perfect adjustment between source and headphones.
  • Motorised volume control and manual balance control.
  • 4 powerful amplifiers, 7000 mW Pmax, 50 Ohms / 32 V RMS, 600 ohms.
  • Monitoring of the KH outputs with regard to DC voltage and overload.
  • Headphone and line outputs individually selectable.
  • 1 x balanced headphone output with 4-pin XLR, 4.4 mm Pentaconn, 2 unbalanced outputs with 6.3 mm jack.
  • 2 x line outputs, 1 x unbalanced via RCA, 1 x balanced via XLR.
  • Adaptation of the line outputs to the following devices in the range +/- 12 dB.
  • 2 x toroidal transformers, > 50,000 uF filter capacitance.


  • 1 x Niimbus US 5 PRO.
  • 1 x Remote Control.
  • 1 x Documentation.

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