ZeroUno ULTRA the reproduction as natural as possible

ZeroUno ULTRA Preamplifier

The ZeroUno PLUS ULTRA has been developed based on the experience acquired and lessons learned from our top-of-the-line 90Wrms in pure class A La Scala power amplifier. La Scala exudes authority and maintains absolute control of your loudspeakers, with an astonishing reproduction voted to a natural reproduction in any style of music.

The 90Wrms are reached using only 6 components and without any capacitor in the signal path: mono triode, and mono MOSFET, with full transformers coupling at the input, interstage, output and, last but not least without capacitor on the signal.

ZeroUno ULTRA is the perfect partner of a reference power amplifier to reach the musical authority and effortless ease.

Into the ULTRA there is the shortest possible signal path, with only 10 components used and without any capacitor that can leave its fingerprint. Essentially one ECC82 and one JFET connected in parallel to form a complementary couple, one amorphous core transformer, and 4 resistors. All the superfluous circuities have been cancelled, for a reproduction as natural as possible.

Of course the power supplies are the core of the unit, with 90% of the electronic implemented occupied by them.

Instead of the ECC82 the ECC88 can be used, plug and play.

To finalize the electronic design a reference chain was settled up: turntable Thuono TH400, tonearm Thiele TA01, very low output cartridge DV KARAT 17DX with gold coils, Aesthetic RHEA phonostage, LaScala power amplifier, high definition and high efficiency loudspeakers Sigma Acoustic MAAT Vector.

Exhaustive investigation and auditioning have been done for the perfect selection and match of every component inside the ULTRA, and some proprietary parts have been custom-designed.

The system was presented with success at the last HiEnd in Munich.

The basses are firm, well-defined, with massive attack. Together the gentle richness of detail at the medium high frequencies contribute to the preamplifier’s ability to render the reproduction as natural as possible, with three-dimensional realism and instrumental placement … what we call “natural listening”, or “slow sound” to remember the “slow food” approach.

Both the ZeroUno SE, digital inputs only, and ZeroUno PLUS preamplifier, can be upgraded to the ULTRA version.

DAC and Preamplifiers

DAC with tube output stage
  • 4 digital inputs: RCA, XLR or BNC, USB, OPTIC
  • 32bits volume control
  • 6SN7 tube output stage, including CV181
  • SABRE32 with amorphous transformers output
  • No global feedback
  • 5Vpp output swing
  • ultralow-noise power supply
  • ultra-low jitter clock
  • 14 separated power supplies
LINE PREAMPLIFIER WITH ZEROUNO PURE INSIDE
  • 4 digital inputs: RCA, XLR or BNC, USB, OPTIC – 2 RCA analog inputs (XLR optional)
  • 32bits and analog 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
  • 24Vpp output swing
PURE Dac
  • 4 digital inputs: RCA, XLR or BNC, USB, OPTIC
  • 32bits computerized volume control
  • SABRE32 with amorphous transformers output
  • No global feedback
  • 2Vpp output swing
  • ultralow-noise power supply design
  • ultra-low jitter clock
  • 14 separated power supplies
Preamplifier with integrated the ZeroUno DAC
  • 4 digital inputs: RCA, XLR or BNC, USB, OPTIC
  • 2 analog inputs
  • Analog volume control
  • 6SN7 tube output stage
  • ES9018 with Transformers output
  • No global feedback
  • 5Vpp output swing
HEADPHONE AMPLIFIER WITH ZeroUno PURE INSIDE
  • 4 digital inputs: RCA, XLR or BNC, USB, OPTIC
  • 2 RCA analog inputs (XLR optional)
  • 32bits computerized volume control and analog 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
  • 24Vpp output swing
  • Ultra-low-noise power supply design
  • Ultra-low jitter clock
  • 21 separated power supplies

Available for all the ZeroUno Products with the USB2 board.

Interface the sources with a “clean” i2S output with DATA, MCLK, BCK, LRCK not manipulated

Physical connections available:

  • 1x 19 pins HDMI connector (balanced signals)
  • 1x 8 pins RJ45 connector (unbalanced signals)
  • 1x 5-6 pins DIN connector (unbalanced signals)
  • 1x 9 pins D-SUB connector (unbalanced signals)
  • 4x BNC connectors (unbalanced signals)

100Wrms PURE CLASS A hybrid amplifiers

reference power amplifier
  • 100Wrms per channel – 180 Wpeak in pure class A with very low distortion
  • 4 Ohm and 8 Ohm selectable impedance at the output
  • NO capacitors on the signal path
  • minimalist design with a minimum number of active components: voltage stage made with only one tube in push-pull configuration followed by the output current stage made with only a pair of AUDIO MOSFETs in push-pull configuration, transformer output for impedance matching
  • output current stage with buffer configuration
  • NO Global Feedback
  • microprocessor supervision
  • huge power supply with 1900Wrms of reservoir power in dual-mono configuration, massive inductive filter and high current capacitors, soft start at power on
  • massive aluminum and stainless-steel cabinets: 21Kg the amplifier and 39Kg the power supply
reference power amplifier
  • 60Wrms per channel – 140Vpeak in pure class A with very low distortion
  • NO capacitors on the signal path
  • minimalist design with a minimum number of active components: voltage stage made with only one tube in push-pull configuration followed by the output  current stage made with only a pair of AUDIO MOSFETs in push-pull configuration, transformer output for impedance matching
  • output current stage with buffer configuration
  • NO Global Feedback
  • Audio Grade Hybrid Switching Mode Power Supply, 600W reservoir power, high current capacitors, soft start at power on
  • massive aluminum and stainless-steel cabinets: 21Kg the amplifier and 10Kg the power supply

PRIVACY

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Canever Mario – P. IVA IT04171260278  info@canever.eu

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