My retailer suggested I purchase his Rega Osiris Integrated Amplifier to replace my Musical Fidelity M6Si integrated amp. The unit is preowned from someone that upgraded to separates. I plan to audition the amp next Saturday.
My retailer said “The Rega Osiris Integrated Amplifier is described as slightly warm sounding, leaning just a bit to the warm side of neutral. Its midrange is particularly praised for being rich and seductive, offering a musical and engaging presentation. This warmth is subtle and balanced, avoiding excessive coloration while maintaining excellent detail and dynamics”.
This amp has a dual mono amplifier housed in a custom Rega CNC machined aluminum case. The specs say the amp is designed around “minimalist” high gain power amplifier and “passive pre-amplifier” circuit topology, a passive volume control and a single stage of power amplification between the input and the speakers, the Osiris offers unrivaled performance and build quality”. I am using the Bricasti M21 DAC and PMC speakers.
In summary, the Rega Osiris is a high-performance integrated amplifier distinguished by several key design features:
Technical Highlights
• Dual mono design with 162 W per channel into 8 Ω
• Uses a “minimalist” high-gain power amplifier topology
• Features a single stage of power amplification
• Employs eight Sanken 200-watt output transistors in a “triple” high-current output stage
Advanced Circuit Design
• Fully symmetrical circuit throughout
• Low-distortion, high-linearity common-base voltage-amplifier driver stage
• Passive volume control using ultra-high-quality Alps Blue Velvet potentiometer
• Cascaded differential input amplifier with low-noise LED referenced current generators
Power Supply Excellence
• Two 400A toroidal transformers
• 40,000µF of Rega K-Power smoothing capacitors per channel
• Dedicated power supplies for audio circuits, separate from control and protection circuits
• Regulated symmetrical-tracking power supply with low-noise voltage reference.
The above technology is interesting, but I am more interested in your comments on the Rega Osiris Integrated Amplifier and its sound quality. My Musical Fidelity M6Si has a smooth, relaxed sound with warmth and seems very musical to me. Obviously, I must hear this amplifier, but I am interested in your thoughts. Thanks.
