ZeroUno HPA

Digital Audio Converter with integrated a Solid State preamplifier

  • 4 digital inputs: RCA, XLR or BNC, USB, OPTIC, optional i2S
  • 2 headphone output, balanced and unbalanced
  • 30Ω to 600Ω headphones output
  • Computerized 32bits volume control
  • Ultra Linear, PURE CLASS A, Solid State output stage – full discrete
  • No capacitors on the signal line
  • SABRE32 with amorphous transformers output
  • No global feedback
  • 30Vpp output swing


The ZeroUno DAC-HPA represents a top-quality DAC based on the well accepted ZeroUno DAC – a strong headphone amplifier running in pure Class A and a remote controlled preamplifier, able to drive any power amp or powered speaker – all in one box.
The building blocks of the ZeroUno DAC-HPA are based on a set of high-performance power supplies, giving each part of the machine a rock solid base to perform at top level. Looking at the boards inside the ZeroUno DAC, one can identify almost 70% of their space covered by the circuits for the individual power supplies. For more details about the design of the power supplies for the CanEVER Audio® product line, please refer to the detailed technical descriptions of the ZeroUno DAC or the LaScala PowerAmp.
Special care inside the ZeroUno DAC-HPA has been taken to achieve short signal paths with a minimum amount of high-grade components. You will especially experience this in the headphone amplifier since there are no coupling capacitors used in the signal path, and all circuits are free of feedback loops.

The CanEVER Audio® ZeroUno DAC-HPA is a:

  • top quality DAC based on the circuit of the ZeroUno DAC
  • headphone amplifier with connections for unbalanced AND balanced connections
  • digital preamplifier including remote control with functions for: volume, balance, absolute phase, input & mute

The analog output stage is based on a discrete topology without operational amplifiers and runs in pure Class A mode.
There are two pairs of RCA output connectors:
One pair of outputs gives access to the analog signal directly at the D/A stage.
The other pair outputs the amplified signal of the preamp stage.
The output stage is designed as a current source with low output impedance able to drive power amps or powered speakers directly, if needed.
The headphone amplifier inside the ZeroUno DAC-HPA is a dual mono design with a super-linear driver, delivering power of 2,5 Wrms even into 30 Ohm per channel in pure Class A.
The complete signal path inside the ZeroUno DAC-HPA consists of a very limited number of components.
In the amplifier stage there are no:
 capacitors
 integrated circuits
 feedback loops


6moos review by Srajan Ebaen

6moons BLUE MOON Award