HD100 – HD120


Our HD100 and HD120 models stand out with their unique converter stage, enabling you to enjoy digital sources. We’ve meticulously developed these models around the finest headphones, ensuring exceptional versatility and flawless musicality. Notably, both models feature a preamp output that can be seamlessly combined with MA100 or any other ATOLL power amplifier.

  • 4 mm brushed aluminium front.
  • 3 independent linear transformers (including
  • 2 very low noise reserved for analogue audio in dual mono configuration).
  • 8 regulated power supplies (including 4 specifics for the audio stages).
  • Analogue volume control (ALPS potentiometer).
  • Class A biased discrete component audio preamp stages.
  • Final stage with bipolar transistors.
  • High-end CLARITY CAP MKP Link Capacitors.
  • BURR-BROWN PCM5102 converter:
              – Dynamic: 112 dB.
              – Signal/Noise ratio: 112 dB.
  • Optional remote control (volume management and selection).
The rear face of the HD100 model.
HD120 vue arriere
The rear face of the HD120 model.



2 Line inputs (RCA).
1 Coaxial input (24 bits/192 kHz).
1 Optical input (24 bits/192 kHz).
1 USB-B input (24 bits/192 kHz).
1 Preamplifier output (RCA).
1 Trigger output 12V (direct On/Off connection with the MA100).


2 Line inputs (RCA).
1 Coaxial input (24 bits/192 kHz).
1 Optical input (24 bits/192 kHz).
1 USB-B input (24 bits/192 kHz).
1 Preamplifier output (RCA).
1 Trigger output 12V (direct ON/OFF connection with the MA100).
1 Bluetooth® input (direct i2S link).


Power supply: 12,4 VA
Rated power: 1,4 W/32Ω
Pulse power: 6,8 W/32Ω
Total of capacitors: 12 425 µF
Number of inputs: 2 analogues, 3 digital, 1 Bluetooth® (HD120)
Input impedance: 220 kΩ
Headphone output impedance (X2): 1Ω
Bandwidth: 1 Hz – 150 kHz
Rising time: 1,5 µs
Signal/Noise Ratio: 100 dB
Distortion rate at 1 kHz: < 0,01%
Dimensions (mm): 320×225×63
Weight: 3 Kg


Important: the use of the USB input of the DAC board requires the download of a specific driver for Windows computers. This can be downloaded below. This driver is not necessary under MAC and Linux.

Download it here:



The HD100 has a single amplifier, but its power can accommodate two headphones in parallel. In addition, its output impedance is low enough to broadly support two headphones without affecting musicality.

Optional remote control (allowing to control all products: Integrated, CD Players, Tuner, DAC).

“(…) In conclusion, the headphone amplifier with USB S/PDIF Atoll HD100 DAC offers excellent sound results where a sense of detail, sound balance and respect for dynamics combine happily. It also features two inputs, analogue outputs and a line output with variable levels. It can also be used as a preamplifier, offering the same excellent performance. our Qobuzissime reward.”

Qobuz Presse 

The HD100 and HD120 models are available in black or natural aluminium:

Black anodized brushed aluminum finish.
Silver anodized brushed aluminum finish.