Rega Mercury & Solis: HiFi Pig Reviews Rega's Flagship Separates
Posted by The Sound Organisation on Oct 14th 2026
In a review by Jon Lumb for HiFI Pig, Rega’s flagship separates—the Rega Mercury Preamplifier (£6,500 / $10,495) and Rega Solis Power Amplifier (£6,500 / $10,495)—were put to the ultimate test. Designed as a substantial upgrade over the long-standing Osiris integrated amplifier, this £13,000 pairing elevates Rega’s amplification lineup into the same reference tier occupied by their flagship Naia turntable.
Discrete Symmetry, High Current, & Comprehensive Connectivity
The Mercury and Solis draw upon decades of solid-state engineering, arriving with exceptional build quality and a high-value package that includes over £700 worth of bundled Rega Couple 3 RCA interconnects and Reference mains power leads.
- Mercury Preamplifier Features: Houses ten total inputs—including four RCA pairs, one balanced XLR pair, record in/out, and a full digital suite (USB-B, two coaxial, two optical) driven by Wolfson DACs. A clear front display, a dedicated high-current headphone output stage, and a solid metal remote complete the user interface.
- Solis Power Amplifier Architecture: A heavy 24.8kg Class A/B power engine backed by two massive custom toroidal transformers. It delivers an uncompromising 168W into 8Ω and 305W into 4Ω, providing immense current reserves to drive even complex, low-impedance loudspeaker loads.
- Single-Ended Optimization: While balanced XLR terminals are provided for studio applications, Rega explicitly recommends using single-ended RCA connections to bypass unnecessary conversion circuitry and maintain absolute signal purity.
Muscle, Authority, and Organic Musicality
On the audition bench, the Mercury/Solis combination exhibits a remarkably grounded, full-bodied presentation that handles difficult speaker loads with complete ease. Intimate acoustic sessions—such as Pat Metheny's solo baritone guitar on One Quiet Night—are rendered with natural midrange warmth, body, and micro-detail, balancing string resonance against fretboard nuance without adding artificial brightness.
When pushed hard with heavy electronic bass transients like Hedegaard's Inferno/Ratchet or bright, energetic pressings like Portishead's Cowboys, the Solis maintains iron-fisted control. Low frequencies remain deep, tight, and agile without bleeding into the midband, while the upper registers deliver exceptional insight, clarity, and speed without causing listener fatigue.
The Verdict: The Rega Mercury and Rega Solis mark a triumphant leap into flagship separates. Offering effortless loudspeaker control, expansive digital/analogue connectivity, and an engaging, music-first presentation, this pairing stands as an incredible value proposition in high-end audio.