The 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. Premium multi-device - Versatile high-end amplifier: Enjoy a compact and fantastic sounding headphone amplifier and a premium preamp. The Niimbus US 5 PRO has a sophisticated preamp function to 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 magnetostatics headphone in the best possible way. The headphone outputs and the rear line outputs can be activated/deactivated using a switch on the front. Versatile remote control: For undisturbed listening pleasure, almost all functions can be controlled via the elegantly designed remote control milled from one piece. Infrared gives you access to the motorized volume control, mute, input selection, headphone and line-out control. Overview: Thanks to its incomparable technology, the Niimbus US 5 PRO is one of the most powerful headphone amplifiers on the market. It is characterized by: Lowest noise - due to a very small internal gain. As a result, the inherent noise of the amplifiers is inaudible. High output voltage - due to 50 volt internal operating voltage. Therefore ideally suited for high-impedance headphones. High output power - through powerful amplifiers that can deliver far more power than even the most demanding headphone can need. Therefore ideally suited for headphones with low impedances and also magnetostatics. High damping factor - due to the lowest output impedance. Therefore ideally suited to control even the most difficult headphones without influencing them with a guarantee for an uncompromising frequency response.