Built to deliver versatile and premium sound quality in a compact, desktop form-factor, the Niimbus US 5 Pro Headphone Amplifier from Violectric is a powerful, 2-channel audiophile headphone amplifier with both amp and pre-amp functions and enough power to drive any sized headphones, including dynamics, planars, and active loudspeakers. This handmade amp sports a 100% analog circuit and hand-selected components for uncompromising sound, and the wide ranging I/O ensures you can easily connect to any device, in any way you see fit, from RCA and XLR inputs, to 1/4 , RCA, XLR, and 4.4mm outputs, all selectable from the front panel.
The high damping factor makes the US 5 Pro an ideal choice for difficult to drive headphones, and the ultralow-noise operation pairs well with the oversized, high-voltage power supply to provide incredible detail and optimal performance on low-impedance headphones. With it s quad amplifier that delivers far more power than most demanding headphones require, and its compact metal chassis, the US 5 Pro is an ideal choice for any home studio, professional podcasting setup, or expansive home entertainment system.
2-in-1 Combo Amplification Box
Why choose between an audiophile-quality headphone amp and a powerful speaker pre-amp? The Niimbus US 5 Pro handles both with ease, thanks to the onboard circuit selection, which allows you to switch between an amp circuit designed for headphones and a pre-amp circuit designed for speakers. Just hit the front-panel buttons or use the included infrared remote control to send the output to the headphone or line outputs. The US 5 Pro can drive active speakers and control power amps without a sweat via its balanced XLR outputs, allowing you to enjoy a compact and fantastic sounding headphone amp or a premium speaker pre-amplifier, all in one box.
Comprehensive Analog I/O
With a multitude of analog input and output options, you will never be disconnected from your preferred devices with the US 5 Pro headphone amp. Front- and rear-panel options make it simple to wire your amp for use as the nerve center of your home entertainment system or a faithful companion to your home studio setup.
- Two Balanced XLR 3-pin inputs (left and right)
- Four unbalanced RCA inputs (left and right)
- Two balanced XLR 3-pin line outputs (left and right)
- Two unbalanced RCA outputs (left and right)
- Balanced XLR 4-pin headphone output
- Two unbalanced 1/4 headphone outputs
- Balanced 4.4mm headphone output
Adaptive Features and Digital Control
The US 5 Pro sports robust and easy-to-use digital control options for it s analog circuitry. With motorized knobs, simple push buttons, and numerous automatic features that adapt to different devices and protect your amp from damage, the Niimbus US 5 Pro couldn t be easier, or safer, to use. And with the included aluminum infrared remote control, you can easily control all your settings wirelessly, including input selection, output selection, volume, and mute.
- Onboard volume and balance control
- Push buttons for input and output connector selection
- Monitoring of headphone output based on DC and overload
- Adaptation of line-out signal to the connected devices in the range of ±12 dB
- Rear-panel DIP switches for controlling pre-amp and output amp gain from -12 to +12 dB
- Solid aluminum infrared remote control
- Delayed activation with power-on and immediate separation during power-off
- DC, overload, and thermal protections
Excellent Build Quality
The US 5 Pro Headphone Amplifier is hand-constructed from top-notch materials, from the carefully selected internal analog components to the rugged aluminum and steel exterior, and is guaranteed to last you for years of use.
- 100% analog signal path
- Black anodized aluminum front and rear panel
- 2mm sheet steel chassis with metallic coating
- Remote control milled from a solid piece of aluminum
- 60V internal operating voltage for high-impedance headphones with high-output voltage swing
- 256-step volume control via relay and motorized balance control knob
- Four powerful amps offering up to 7000mW max
- Two oversized, toroidal transformers with more than 50,000 uF filter capacity
- Handmade in Germany
Violectric NIIMBUS US 5 PRO Specs
| Form Factor | Tabletop |
| Number of Headphone Channels | 2-Channel |
| Recommended Headphone Impedance | 4 to 600 Ohms |
| Headphone Output Power | Balanced: 7000 mW into 50 Ohms (0.01% THD, 1 kHz) |
| EQ | None |
| Display | None |
Connectivity
| Analog Audio I/O | 4 x RCA Coaxial Unbalanced Line Input (2 Stereo Pair, Rear Panel) 2 x XLR 3-Pin Balanced Line Input (1 Stereo Pair, Rear Panel) 2 x RCA Coaxial Unbalanced Line Output (1 Stereo Pair, Rear Panel) 1 x 4.4 mm TRS Balanced Stereo Headphone Output (Front Panel) 2 x 1/4" TRS Unbalanced Stereo Headphone Output (Front Panel) 2 x XLR 3-Pin Balanced Line Output (1 Stereo Pair, Rear Panel) 1 x XLR 4-Pin Balanced Stereo Headphone Output (Front Panel) |
| Digital Audio I/O | None |
| Network I/O | None |
| USB | None |
Performance
| Frequency Response | 5 Hz to 250 kHz ±0.5 dB |
| Maximum Input Level | Line: +21 dBu (10 Kilohm Input Impedance) |
| Maximum Output Level | +21 dBu (1 Ohm Input Impedance) |
| Dynamic Range | > 135 dB (A-Weighted) |
| Impedance | Outputs: 0.1 Ohm (Unbalanced) 0.2 Ohm (Balanced) |
| THD+N | < -104 dB / < 0.00063% (At 1 kHz/2 x 10V/100R = 1W) < -103 dB / < 0.00071% (At 1 kHz/2 x 4V/32R = 0.5W) |
| SNR | > 129 dB (A-Weighted) |
| Noise | < -104 dBu (A-Weighted) |
| Crosstalk | -105 dB (1 kHz) -103 dB (15 kHz) |
| Damping Factor | 500 at 50 Ohms (Unbalanced) 250 at 50 Ohms (Balanced) |
Power
| Power Requirements | AC Input |
| AC Input Power | 115 to 230 VAC, 50 / 60 Hz (T 1 A) |
| Ground Lift | No |
| AC/DC Power Adapter | None |
| Power Consumption | 50 VA (Maximum) |
Physical
| Dimensions | 13.8 x 9.8 x 2.3" / 35.1 x 24.8 x 5.9 cm (Chassis Only) |
In the Box
- Violectric Niimbus US 5 Pro Headphone Amplifier
- Remote Control
- 5-Year Manufacturer Warranty
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