OsirisRef
The Osiris is the culmination of 32 years experience in solid-state amplifier development. A no compromise, super high performance, 162 W into 8 Ω (250 W, 4 Ω), dual mono amplifier housed in a custom Rega CNC machined aluminium case.
Rega’s flagship integrated amplifier
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 unrivalled performance and build quality. The Osiris is designed as the perfect partner for the rest of the reference range, such as the Isis CDP, Valve Isis CDP and Aura MC phono stage.
Key Features
- 162 W per channel into 8 Ω
- 4 line inputs
- 1 balanced input via XLR
- Reference CNC remote handset
- Direct input
- Record out
- Reference mains power lead
- Lifetime warranty against manufacture defects
Technology
The Osiris uses a low distortion high linearity and a bandwidth common base voltage amplifier driver stage. This type of symmetrical circuit topology will provide the necessary voltage swings to enable the Osiris to drive any speaker system with the minimum of distortion. Eight Sanken 200 W output transistors are used in a “triple” high current output stage enabling the Osiris to drive even the most awkward of speaker systems with ease. The cascoded differential input amplifier uses two low noise LED referenced current generators. The open & closed loop feedback levels and gain bandwidth product components are optimised to give a tight and controlled sound stage, especially at the low frequency end of the audio range. Nichicon audio grade capacitors are used in bypass and de-coupling positions. Electrolytic capacitors have been bypassed with polyester capacitors where necessary, improving on the HF performance. Low inductance film SM power resistors are used in the output stage.
Power Supply
The Osiris uses two low noise, purpose designed 400 VA toroidal transformers using high-grade, fully bonded core material. The transformers are mounted to the chassis using Rega’s innovative mounting technique which eliminates noise being transferred from the transformer to the case when the transformers are operating under arduous mains (line) conditions with high levels of asymmetric mains (line) distortion. These transformers combined with 40,000 Micro Farads of Rega K-Power smoothing capacitors per channel, provide more than enough current to drive the hardest of loads. All the power supplies utilise fast recovery rectifier diodes throughout. (Fast diodes generate less high frequency switching noise therefore giving rise to a cleaner DC). The input and low-level driver stages are fed from a regulated symmetrical tracking power supply with a low noise voltage reference, which provides a fully stabilised low noise voltage, ensuring the highest level of sonic purity. All the dedicated audio power supplies feed only the audio circuits. The input switching, display & micro controller and protection circuits have their own dedicated supplies, keeping the audio signal path as pure as possible.
Technical Specifications
- Power Output
162 W per channel in to 8 Ω
- Input Sensitivity
160 W into 8 Ω, 250 W into 4 Ω
- Gain
44 dB
- Record Output
215 mV into 100 k
- Frequency Response
10 Hz (-1.7 dB point)
- THD & Noise
Less than 0.05%
- Power Consumption
560 W at 1125/230 V
- Dimensions (W x H x D)
434 x 122 x 350 mm
- Weight
25.6 kg
For full technical specifications, download Osiris User Manual below.
Downloads
- Osiris User Manual 3.9MB pdf
Environmental Labelling of Packaging
But what makes the Rega so special—so natural and magical at the same time—is that they continually supply streams of contextual information that helps make the music more intelligible, richer in meaning.
Complementary Components
- Rega’s advanced CD technology
- Twin Burr Brown DACs
- Rega ‘K-Power’ smoothing capacitors
- Custom designed reference case
- CNC reference remote control
- Rega’s advanced CD technology
- Twin Wolfson DACs
- Rega ‘K-Power’ smoothing capacitors
- Custom designed reference case
- CNC reference remote control
- Compatible with all typical low output moving coil cartridges
- Three stage, all symmetrical pre-amplifier
- Fully adjustable
- RB3000 tonearm
- Apheta 3 or Aphelion 2 (optional)
- 18 mm Ceramic Oxide diamond cut platter
- DB technology with ceramic top brace
- Tancast 8 foamcore plinth
- P10 Advanced PSU
- Custom designed smoked dust cover
- Reference EBLT drive belt
- 1/4 wave transmission line enclosure
- ‘Environment match’ adjustment feature
- Rega ‘dual driver bass system’
- Integrated BMR driver technology
- Rega designed tweeter handmade ZRR10 HF Unit
- Real wood veneer
Experience Rega
Contact your nearest Rega dealer or global distributor
Lifetime Limited Warranty
All Rega products carry a Lifetime Limited Warranty.
Every product we make is designed and assembled in the UK to the highest possible standard. This warranty covers confirmed manufacturing defects. This warranty does not cover wear and tear, or parts that are considered consumable. Any unauthorised modifications or failure to follow the Rega recommended guidelines in the product manual may invalidate the warranty. Due to local laws, warranties may vary by country in which units are sold. Please contact your Rega retailer or distributor for warranty details. Your statutory rights are not affected.