Violectric HPA V550
High-end preamp and headphone amplifier with neutral precision and extensive connectivity.
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Violectric HPA V550
High-End Headphone Amplifier and Preamplifier – Successor to the V281
The Violectric HPA V550 is the successor to the highly regarded V281 and adopts the analog functions of the award-winning DHA V590 – but without a DAC. It offers perfect control of all dynamic headphones and an outstanding preamplifier stage. The latest developments from Violectric and Niimbus have been implemented consistently. All functions can be conveniently controlled with the elegant aluminium remote control.
Technology Highlights
- Ultra-low noise: extremely low internal gain makes self-noise practically inaudible.
- High output voltage: ±50 V internal rails – ideal for high-impedance headphones.
- High output power: massive reserves for low-impedance and planar-magnetic headphones.
- High damping factor: extremely low output impedance for linear frequency response and precise control.
Remote Control
The solid aluminium remote control operates motorized volume, mute, input selection, headphone and line-out switching, as well as resampling settings.
Connections & Features
- 3 analog stereo inputs: 2× RCA (unbalanced), 1× XLR (balanced)
- ±18 dB pre-gain for optimal matching between source and headphones
- Motorized Alps RK27 volume control and balance knob
- 4 amplifier stages with 6400 mW @50 Ω and 21 V RMS @600 Ω
- DC and overload monitoring, delayed output activation
- Headphone outputs: 2× 6.3 mm (unbalanced), 1× 4-pin XLR (balanced)
- Line-out: 1× RCA (unbalanced), 1× XLR (balanced), output level adjustable ±18 dB
- 2 toroidal transformers with more than 35,000 µF filter capacitance
- Dimensions: 290 × 80 × 248 mm (W × H × D)
Package Contents
- 1× Violectric HPA V550
- 1× Remote Control
- 1× Power Cord
- 1× User Manual
Not sure if the Violectric HPA V550 is the right model for you? In our The Great Violectric Model Comparison we put every model in the lineup head-to-head.
Who is the HPA V550 best suited for?
The HPA V550 suits listeners who want the maximum analogue amplifier power in the lineup – ideal for very high-impedance or hard-to-drive headphones – and who are happy with classic, motorized potentiometer volume control. The right choice for anyone who wants reference-level power without paying extra for the PRO version's relay-based volume control.
Technical Data
| Item No. | 1007797 |
| Dynamic Range | >131 dB (A-weighted) |
| Dimensions (W × H × D) | 290 × 80 × 248 mm |
| Max. Input Level | +21 dBu |
| Amplifier Design | 50 mm aluminium |
| Volume Potentiometer Type | 50 mm aluminium |
| Volume Knob | 50 mm aluminium |
| Case Design | Desktop |
| Output Impedance | <0.1 Ω |
| Input Sensitivity | +6 dB |
| Input Impedance | 10 kΩ |
| Colour | Black |
| Signal-to-Noise Ratio (SNR) | < –103 dBu (A-weighted) |
| Frequency Response | 5 Hz – 250 kHz (–3 dB) |
| Crosstalk | –105 dB (1 kHz) / –100 dB (15 kHz) |
| Amplifier Channels | 2 |
