Nagra Archives 29/30 - Nagra HD AMP

The Nagra HD AMP Statement power amplifier was designed for ultimate high-end systems that are able to reproduce the music realistically. The HD AMP are mono amplifiers, they can drive the most demanding speakers and transcend their performance. The HD AMP came from the need of bringing Nagra signature transparency into more powerful amplifiers to accommodate yet larger rooms and larger speakers. The Nagra HD AMP audio amplification stage is relatively simple in its conception; this is in part what makes it so transparent and direct. Actually, each stage has been tuned to reach striking results. The driver stage for instance features numerous decoupling capacitors of different technologies. It has a very low output impedance to make the most of the power MOSFETs that follow. There is only 6 MOSFETs to get the best compromise of power and transparency.

The power supply goes to extremes to make sure the amplifier is stable and can deliver high power at any time. It is built around a 1600 VA transformer. In Nagra’s own tradition it is followed by a multiple diode stage and a very complex dual PI filter. This allows the amplifier voltage rails to be extremely stable. In addition, the current draw from the HD AMP is not polluted by impulse signals. So the rest of the set-up can perform at its best. The dual Pi filter acts like a protection shield between the HD AMP and the mains.

Each Nagra HD AMP unit features a bank of 264 mF of custom-made Mundorf condensers. They are the reference in their category and you rarely meet them in this quantity because most manufacturers consider them too expensive. We have chosen them after many hours on the test bench and numerous critical listening sessions.

  • 250 W RMS per channel into 8 Ω
  • 1000 W RMS per channel into 2oHm
  • First 30 W pure class A
  • Sensitivity: 1 V or 2 V RMS
  • Bandwidth: 0 Hz to 120 KHz, +0/-0.5 dB
  • Crosstalk: Not related for mono amplifiers
  • Signal-to-noise ratio: Typically 110 dB
  • ASA “A” weighted
  • THD+N: < 0.03%
  • Input type: XLR balanced
  • RCA unbalanced
  • Input impedance: 88 KΩ on balanced input
  • 44 kΩ on unbalanced input
  • DC filter: Toggle switch allows to cut the DC of incoming signals



RMAF 2018

MUNICH 2019:

Customers comments about the new HD AMP/ 2020:

It is very hard to leave the house these days, when you have people playing “live” in your living room! I am listening 10 to 15 hours per day, Sounds amazing! It is important to know that the older HD AMP can be upgrade to the new 2020 HD AMP version.



30 times winner of BEST SOUND OF SHOW at high-end audio equipment conventions in the past 4 years.

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