Jeff Rowland Corus Preamplifier

The preamplifier yields exceptional frequency extension and linearity, with magnificent bass definition, an extraordinarily complex exposure of harmonic structure, and a sweetly filigreed treble. The Corus yields amazingly nuanced low level detail and micro-dynamics, and outperforms every previous Rowland preamplifier with its transient speed, staggering authority, and breath-taking macro dynamics. Only the transcendent resolving musicality of the Criterion battery-powered Preamplifier ever yields an even superior listening experience.

The Corus’s refined sensuous musicality, sonic excellence, and trend setting usability features are derived from the Criterion’s, whose sophisticated architecture pushes the limits of today’s technological art. The Corus’s elegant topology is completely balanced in the input phases, in circuit, and output phases. An elegant main chassis milled from ingots of nonresonant aircraft-grade aluminum houses all delicate audio and control circuits, while the ground-breaking AC power supply is segregated in its own handsome external milled aluminum unit.

The preamplifier’s features fully isolated transformer-coupled balanced and single-ended inputs and outputs, military-grade 4-layer ceramic boards, as well as incredibly low noise and high gain differentially balanced OPA1632 audio amplifier modules at its core. These, together with a number of further trend-setting engineering solutions, are implemented into the most compact circuit topology of any Rowland reference preamplifiers to date.