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.