Osiris - Receiver REGA - Free user manual and instructions

USER MANUAL Osiris REGA

This OSIRIS amplifier has been hand assembled and tested to the highest quality by:

Production Technician:

Electrical & Mechanical Quality Assurance:

Serial number:

REGA RESEARCH LIMITED

QUALITY HI-FI DESIGNED AND BUILT IN ENGLAND SINCE 1973.

Hi-fi for music lovers...

Rega Research Ltd first started making specialist Hi-Fi equipment in 1973. Back then life and the Hi-Fi world were simpler; Rega produced just one product, a turntable. The designer (and at that time production team) Roy Gandy had some very specific design goals. First and foremost excellent sound reproduction, ease of use, strong reliability, great value for money and finally a long life. Roy achieved his goal through elegant technical solutions and clever production processes, often creating engineered assemblies at unbelievably low prices. These savings were handed onto the consumer by keeping the cost of the product as low as possible.

Roy is still the owner and a key member of the design team, a team which consists of some employees whom have been at Rega for thirty years inheriting all of Roy's attributes in product design. Currently Rega makes more than 40 different products including turntables, CD players, tuners, amplifiers, DAC's, and Loudspeakers to name but a few, all of which clearly demonstrate those early Rega virtues.

Having produced astounding sound quality and unrivalled value for money consistently over the years you may ask how Rega keeps such tight control on the quality and performance of the products we build? Easy, all are lovingly hand assembled in our own factory here in Essex, England. In fact we are so confident in our ability that we offer a lifetime warranty against manufacture defects on all of our products.*

Rega products, designed for music lovers by music lovers.

DSH

INTRODUCTION, DESIGN HISTORY AND INNOVATION 1

TECHNOLOGY BEHIND THE OSIRIS 2-3

COOLING AND PROTECTION TECHNOLOGY 4

I N S T A L L A T I O N

INPUT AND OUTPUT CONNECTIONS 6

L I F E T I M E W A R

BASIC TROUBLESHOOTING GUIDE 12

INTRODUCTION

Thank you for purchasing the Rega Osiris amplifier the highest performance Rega amplification to date. The Osiris is a 162 Watt 8Ω (250 Watt 4Ω) super high performance, dual mono amplifier housed in a custom Rega CNC machined aluminium case with high thermal efficiency heat sinks. 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 speaker (ensuring the signal path remains as short and clean as possible) the Osiris offers unrivalled performance, build quality and styling.

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DESIGN HISTORY AND INNOVATION

The main development objective was to create a no compromise audio amplifier. The Osiris amplifier is the culmination of 32 years of our Rega engineers experience in solid-state amplifier development. This expertise combined with the “clam shell” Elicit, Exon and Hal amplifier circuits gave the foundations for the advanced amplifier circuit found in the Osiris. All components selected during the design process (specialist audio components were used throughout) were chosen for their sonic and electrical properties. Using state of the art surface mount technology perfected whilst designing the latest Elicit integrated amplifier we now arrive at Rega level IV amplifier circuitry and the Osiris was created.

TECHNOLOGY BEHIND THE OSIRIS

Amplifier circuit.

The Osiris uses a fully symmetrical circuit throughout and a low distortion high linearity and 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 Watt 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 decoupling 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. All these features amalgamate to create the supreme level of performance found in the Osiris.

Power supply.

The Osiris uses two low noise purpose designed 400VA 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 40,000μF 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, thus keeping the audio signal path as pure as possible.

TECHNOLOGY BEHIND THE OSIRIS (cont'd)

Input switching and Signal path

The input switching is routed by high performance relays offering minimum loss and sonic colouration combined with maximum reliability. The input relays are controlled by a micro controller, which has its own power supply galvanically isolating it from the audio circuits. There is a direct input, which bypasses all the input switching and volume control, this gives direct access to the input of the power amplifier. Mundorf Mcap polypropylene capacitors and Alps Blue Velvet potentiometer are used in the input signal path.

Balanced input

Osiris Input 1 is fully balanced, and in keeping with the minimalist circuit topology, we have opted to use a transformer as opposed to an electronically balanced input circuit. This transformer is made to the same exacting standards to that of the transformer used in the IOS MC amplifier.

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Internal Wiring

High cross sectional area high quality wire is used in the internal speaker wiring and Klotz low loss co-axial cable has been used in the low level signal path, these along with gold-plated speaker and input sockets will yield the best sonic performance and musical results when used the same high quality interconnects.

COOLING AND PROTECTION TECHNOLOGY

Ventilation

The heat produced by the Osiris amplifier is dispersed to the air via the case, particularly from the heat sinks mounted on either side of the product. Please ensure the heat sink section is always exposed to allow sufficient airflow to provide adequate cooling of the amplifier. If the Osiris is driven at high volume for a long period, it will generate heat this is entirely acceptable and as long as there is sufficient ventilation the amplifier will continue to work quite normally. Never place the amplifier on carpet, rugs, bedding or other hi-fi equipment or cover the heat sinks.

Thermal Cut-Out

If the amplifier reaches a temperature liable to cause internal electronic damage a thermal protection sensor will shut the unit off. If this occurs there will be no sound emitted from the speakers. The unit should be turned off for at least 30 minutes to allow for cooling. After this period, the amplifier should automatically reset and continue to work normally. If it does not, turn off for several hours before retrying. The thermal cut-out should only occur with continuous driving of a difficult load. If it occurs under normal conditions, there could be a problem with one of the components of your system, or insufficient air flow around the unit.

Protection

The Osiris amplifier has a fully protected output stage, with DC, electronic thermal protection and Load-line protection. Like the input switching this circuit is supplied from a dedicated power supply. The DC protection will activate within milliseconds, protecting any connected device. All the protection circuits are so designed that they are peripheral to the signal path and not influencing the sonic qualities of the Osiris in anyway.

Short Circuit Protection

In the event of a speaker lead short, the load-line short circuit protection will guard the output stage from excessive currents and voltages. This Rega protection circuit is not placed in the audio signal path and therefore does not affect sound quality.

INSTALLATION

Ensure the operating voltage of the Osiris (stated on the base) is the same as that of your local power supply.

The Osiris amplifier will work well on most surfaces, a high quality equipment stand which provides plenty of space for air flow to prevent overheating is recommended. If using a phono stage and turntable you can avoid magnetic interference by positioning the amplifier as far away from the turntable as the interconnect will allow. If possible, place it to the side of the turntable. Keep other equipment, such as tuners or CD players away from the amplifier. Due to the layout of Rega's amplifier circuit designs, they are virtually insusceptible to electro magnetic interference, and by virtue of the custom aluminium case, emit practically no electro magnetic radiation. However, placing any electronic equipment close together may impair the performance of one or both items. Never stack other hi-fi components on top of the Osiris amplifier.

WARNING: The OSIRIS weighs 25.6kg, please ensure the shelf or stand you are using can safely support this weight. Please refer to your stand manufacturers manual for maximum load capacity.

Mains lead (supplied)

A Rega designed fully shielded, high quality, high current capacity mains lead is included.

Close-up of a black cable with mesh texture and connector, isolated on white background (no text or symbols visible)

INPUT AND OUTPUT CONNECTIONS

Inputs

Input 1 is a standard line level balanced input. Inputs 2,3,4 and 5 are standard line level and can be used with any line level source.

Note: Input I can be used as an un-balanced input by connecting pin 1 to pin 3 and connecting the input earth (screen) to pin 1 & 3 and connecting the signal (core) to pin 2. This will require an XLR connector.

Rear Panel Connections

Input 1 is made via XLR connection.

Inputs 2,3,4 and 5 are made via RCA (phono) connectors.

The sockets on the Rega amplifiers are clearly marked red and black.

Record Input and Output

This is a line level input and output intended for use with a recording device. Selecting the record function via the remote handset enables the input (RECORD MONITOR is displayed). This input is completely independent to inputs 1-5. You can monitor the record function and quality without affecting the source being recorded. The output is a record signal and is the same signal as selected by the main input selector 1-5 and is not affected by the

Osiris volume control.

Direct Input

This input is routed directly to the power amplifier input with no volume control. The intended use is with multi channel systems, where the traditional two-channel system is used as the front speakers. This input can also be used with an external pre amplifier, if so desired, or a source component if it is fitted with it's own volume control. The level is 220mV for maximum output. CAUTION - As this input has no volume control, if a source such as a CD player is connected to this input the speakers will be driven to their maximum, this could potentially damage the speakers and amplifier.

Left Input 1 Right Input 2 Input 3 Input 4 Input 5 Record Input Direct Input Record Output Spikes + - Left - Power (L) - - 600 mA 600 mA Power In + Right - 200V 800Hz

Press the power button located on the left hand side of the Osiris front facia.

Input 1-5 select

Inputs 1-5 can be selected using the "Up" and "Down" selection switches.

Volume

Simple black circular shape with a white rectangular cutout and a small white vertical line inside (no text or symbols)

Adjusted via the large volume control knob located on the front panel.

OSIRIS REMOTE HANDSET

Remote Control

The Osiris is supplied with a custom Rega remote control. Using this will allow you to increase and decrease the volume, select mute, record, direct and change the input selection.

Volume UP Volume DOWN Input select 1-5 Mute Record Direct Osiris By Page Research Ltd. [phone] AMFM Press Display Volume up Shuffle Report Prog Check Clear Time Input 1 Input 2 Input 3 Multi Input 4 Direct Record Direct

This remote unit will also allow you to operate all other Rega remote control compatible products including the Isis CD Player.

TECHNICAL SPECIFICATIONS

Power output	162 Watts per channel into 8Ω (Rated power output)
Power output	250 Watts per channel into 4Ω (max-power output)
Input sensitivity for 160 Watts into 8Ω
Line input I	250mV load 10K (transformer balanced)
Line inputs 2-5 and record	220mV load 22K
Direct input	220mV Load 50K
Amplifier gain: Direct input	44dB
Record output (with rated input level)	215mV into 100K
Frequency Response referenced to 160 Watts into 8Ω (all inputs)	10Hz (-1.7dB point) to 75KHz (-3dB point)20Hz to 26KHz (-0.5dB points)
THD + Noise	Less than 0.05% (Bandwidth 22Hz to 30KHz
Power consumption at 160 Watts per channel into 8Ω	560W at 115/230V
Remote control	Phillips RC5 system number 16 audio pre amplifier
Dimensions H x W x D cm	12.2 x 43.4 x 35
Mains Fuse 230v version	3.15A
Mains Fuse 115v version	6.3A
Osiris system remote batteries	AAA (1.5) x 2 (Supplied)
Weight	25.6 kg

WARNING

To prevent fire or shock hazard, do not expose the unit to rain or moisture.

To avoid electrical shock, do not attempt to open the case.

Refer servicing to qualified Rega agents only.

GLOSSARY OF TERMS

Passive Pre amplifier circuit-

No amplification within the pre amplifier circuit.

Alps Blue Velvet potentiometer-

Considered to be one of the highest quality motorised film volume controls available today.

Clam shell-

Original die-cast Rega electronic casework.

Cascoded differential input-

A configuration which greatly enhances the quality of the initial input stage.

Nichicon Audio Grade Capacitors-

Very high quality audio capacitors

Rega K-Power smoothing capacitors-

Rega branded Highest Quality specification power supply capacitors.

Galvanically isolated power supply-

Isolation of two or more electrical circuits where interference may cause a problem.

Mundorf Mcap polypropylene capacitors-

Very high quality AXIAL capacitors,

LIFETIME WARRANTY

The Osiris amplifier is covered by the Rega lifetime warranty.* Our warranty covers any failure caused by manufacture defects or faulty parts.

• Warranty is transferable providing proof of the original purchase is held.
  • Warranty is only covered in the country of purchase.
  • Overseas transfer invalidates the warranty.
  • Please note: Wear and tear is not covered by the warranty.
• Misuse of this product may invalidate the warranty.

*This does not affect your statutory rights.

Modern electronic device with two stacked boxes and a digital display, illuminated by warm lighting against a black background (no text or symbols visible)

BASIC TROUBLESHOOTING

NO POWER

graph TD
    A["CHECK THE MAINS SUPPLY IS CONNECTED AND THE SOCKET IS SWITCHED ON"] -->|YES| B["CHECK THE ON/OFF BUTTON IS FULLY DEPRESSED"]
    A -->|NO| C["PLUG IN AND SWITCH ON"]
    B -->|YES| D["CHECK THE FUSE IN THE MAINS PLUG HAS NOT BLOWN (TRY ANOTHER FUSE)"]
    B -->|NO| E["CONTACT YOUR REGA DEALER IF IT APPEARS FAULTY"]
    D -->|YES| F["REPLACE THE FUSE"]
    D -->|NO| G["CHECK THE MAINS SOCKET IS LIVE (PLUG IN ANOTHER APPLIANCE)"]
    D -->|NO| H["IF NOT, CHECK HOUSEHOLD FUSES OR CONTACT AN ELECTRICIAN"]
    G --> I["YES"]
    G --> J["IF PROBLEM PERSISTS CONTACT YOUR REGA DEALER"]

POWER ON—NO OUTPUT

graph TD
    A["CHECK THE AMPLIFIER IS CONNECTED TO THE DESIRED INPUT AND THE CORRECT INPUT IS SELECTED"] --> B["CHECK THE AMPLIFIER IS SWITCHED ON AND THE AMPLIFIER AND SPEAKERS ARE CORRECTLY CONNECTED"]
    B --> C["CHECK THE VOLUME IS SET TO THE CORRECT LEVEL AND MUTE IS DEACTIVATED"]
    C --> D["IF PROBLEM PERSISTS CONTACT YOUR REGA DEALER"]

Modern electronic device with metallic grille and control buttons, no visible text or symbols

FRANÇAIS

Modern projector with a red display screen and circular vent, displayed on a stand (no visible text or symbols)

INTRODUCTION, HISTORIQUE ET INNOVATIONS 1

I N S T A L L A T I O N

CONNEXIONS D'ENTREE ET DE SORTIE 6

PILOTAGE UTILISANT LES TOUCHES DE FACADE 7

TELECOMMANDE 8

Modern electronic device with a silver top and black base, featuring a red display screen and control buttons (no visible text or symbols)

HISTORIQUE ET INNOVATIONS

Interior view of a computer or electronic device with visible CPU, motors, and wiring (no text or symbols)

Câblage intérieur

Close-up of a black cable with mesh insulation and connector (no visible text or symbols)

CONNEXIONS D'ENTREE ET DE SORTIE

Entrées

Circular black shape with white horizontal and vertical lines, no text or symbols present

Dimensions H x L x P cm 12.2 x 43.4 x 35

Modern electronic device with two stacked boxes, one displaying a play button and the other showing a red screen and control knob (no text or symbols visible)

EN CAS DE PROBLEMES

AUCUNE ALIMENTATION

graph TD
    A["VERIIFIEZ LE BRANCHEMENT DU CORDON SECTEUR."] -->|NON| B["BRANCHEZ ET ALLUMEZ"]
    A -->|OUI| C["VERIFIEZ QUE L'INTERRUPTEUR SUR LA FACADE EST BIEN ENCLENCHE"]
    C -->|NON| D["CONTACTEZ VOTRE REVENDEUR REGA SI L'INTER-RUPTEUR VOUS SEMBLE DEFECTUEUX"]
    C -->|OUI| E["VERIFIEZ LE FUSIBLE DE LA PRISE SECTEUR EN QUESTION"]
    E -->|OUI| F["REPLACEZ LE FUSIBLE"]
    E -->|NON| G["VERIFIEZ QUE LA PRISE SECTEUR MURALE FONCTIONNE BIEN (ESSAYEZ UN AUTRE APPAREIL)"]
    G -->|NON| H["VERIFIEZ LE DISJONCTEUR OU FAITES APPEL A UN ELECTRICIEN"]
    G -->|OUI| I["SI LE PROBLEME PERSISTE, CONTACTEZ VOTRE REVENDEUR REGA"]

APPAREIL SOUS TENSION MAIS AUCUN SIGNAL

VERIFIEZ QUE LA SOURCE EST BRANCHEE SUR L'ENTREE SOUHAITEE ET QUE CELLE-CI EST SELECTIONNEE VERIFIEZ QUE LES ENCEINTES SONT BIEN BRANCHEES SUR L'AMPLI VERIFIEZ LE NIVEAU DE VOLUME ET QUE LA FONCTION MUTE N'EST PAS SELECTIONNEE SI LE PROBLEME PERSISTE, CONTACTEZ VOTRE REVENDEUR REGA

rega

Rega Research Limited, exceptional Hi-Fi designed and made in ENGLAND.