Unison Research Unico Pre v2 Preamplifier

Unison Research Unico Pre v2 Stereo Preamplifier Key Features:

• Zero Global Feedback Design - ensures a remarkably natural and musical presentation by eliminating the sterile artifacts often associated with heavy correction loops.

• Hybrid Three-Stage Architecture - combines the harmonic richness of Gold Lion ECC83 valves with the precision and drive of solid-state stages for a balanced, engaging sound.

• Dual-Mono Topology - provides superior channel separation and a wide, stable soundstage for a truly immersive listening experience.

• Integrated Sabre ES9018K2M DAC - offers high-resolution digital playback that is tonally matched to the vacuum tube circuitry for seamless sonic consistency.

• Adjustable Phono Stage - accommodates both MM and MC cartridges with selectable gain and load settings, allowing vinyl enthusiasts to fine-tune their analog performance.

Product Description:

The Unico PRE v2 stands as the premier flagship preamplifier within the Unico lineup, showcasing a refreshed aesthetic that balances contemporary elegance with sophisticated engineering. This model serves as a cornerstone of the brand’s latest design language, harmonizing perfectly with the Unico DM v2 power amplifier to create a visually and sonically cohesive system.

Design

Constructed with a front panel carved from a substantial 15mm aluminum block, the Unico PRE v2 exudes industrial precision and structural integrity. Available in refined Midnight Black or Velvet Gold finishes, the chassis is further wrapped in a 2mm aluminum top cover for a seamless, robust feel. Aesthetic nods to the company’s heritage are found in the wooden accents, while the Unison Research® logo is cleverly integrated as the primary power switch. For signal management, the unit utilizes a high-performance integrated circuit and precision resistors to maintain flawless channel balance and transparent volume attenuation across the entire range.

Circuit Design

Engineered with a commitment to pure audio reproduction, the PRE v2 employs a dual-mono layout and a zero global feedback philosophy. The signal path is divided into three distinct stages designed for maximum dynamic impact. The initial stage utilizes a matched pair of Gold Lion ECC83 / 12AX7 valves to establish a low-noise, high-purity foundation. This tube section works in tandem with subsequent solid-state stages to deliver a sound that is both fluid and authoritative, maintaining its musicality even when driving complex system configurations.

Connectivity

Designed to act as a comprehensive system hub, the Unico PRE v2 features an extensive array of RCA and XLR analog inputs alongside dedicated digital and phono connections. Output options are equally generous, featuring XLR and dual RCA outputs for bi-amplification, a dedicated subwoofer out, and a 12V trigger for synchronized system power-on. The inclusion of Line In/Line Out ports also allows for the easy integration of external processors or recording equipment.

DAC Section

At the heart of the digital stage is the Sabre ES9018K2M converter, implemented via a balanced architecture specifically tuned to complement the preamplifier’s valve-based signature. The DAC supports a wide range of modern sources through its USB-B input, dual S/PDIF, and twin Toslink connections, ensuring that high-resolution digital files are treated with the same tonal warmth as analog signals.

Phono Stage

The internal phono section utilizes a passive RIAA equalization circuit built with high-tolerance components to protect the delicate signal from a turntable. To ensure compatibility with a broad spectrum of cartridges, the rear panel includes accessible switches for adjusting load and gain settings. This flexibility allows the user to optimize the interface for either Moving Magnet (MM) or Moving Coil (MC) designs, extracting the full potential of their vinyl collection.

Specifications: