The Reference Equipment Support System

Osiris Stealth Ultimate

"Prior to the Osiris Stealth Ultimate's arrival, I'd expected that it would improve the sound of my system more than my Standard Symposium had -- I just wasn't prepared for the degree of improvement...The Osiris Stealth Ultimate makes fools of audiophiles (like me) who continually upgrade components in search of better performance, never knowing what those components are capable of. Sonically and aesthetically, it takes a back seat to no competitor I have heard or seen, regardless of cost..."

- Howard Kneller, Soundstage!

Read the full SoundStage! review here


Osiris Stealth Ultimate

"The first thing I want to say: It was worth it! ...

"I have a very good audio system, but listening last evening after I turned the system on and let it warm up for a few hours, was the absolute best it has ever sounded. Period, full stop! And that is due solely to the new Osiris racks with appropriate devices placed under each component. The biggest difference was the backgrounds are blacker and quieter, making the music more transparent and dynamic. The sound stage is even deeper and wider with more air around the notes and more depth and layering in the overall presentation. LPs that I know very well sounded incredible, as if I was listening to a new recording of the music. I like to listen to music at fairly high volume levels, and the blacker background allowed me to easily turn the preamp up a couple levels without any distortion, allowing me to "hear into the music" even more. Despite the higher volume settings, it didn't sound loud. The equipment racks were the last part of my system to be upgraded since I began the upgrade process 3-4 years ago (some components went through several iterations during that time) and I did not know exactly how much better it could sound to have reference level stands that match the quality of the rest of my system. I hoped it would be a substantial improvement and I was not disappointed!

"Thank you for being one of those high end manufacturers who is passionate about what you do and the products you make. I was looking for stands that are based on scientific principles and the science behind Symposium products was clear to see once all the parts were unwrapped and put in place, piece by piece. The fact that the Stealth Ultimate racks with the copper legs and black shelves are gorgeous to look at is a nice bonus, but it would mean nothing to me without the underlying science and the sound it produces. I wanted you to know that all of your hard work and dedication is much appreciated and I hope you are able to keep up the work at Symposium for many years to come! Audiophiles like me will continue to be the winners if you do. It truly allows me to enjoy the music more than I did before your stands arrived, and that is the best compliment of all." - KS, Maryland

Osiris Ultra
"I don't think I have heard any audio system sound as open, transparent with whopping dynamics as what mine sounds like now. And this is only one week after I set the rack up...One unexpected great result from the Osiris is the reduction of groove noise from records which there is in spades. I never anticipated this. Amazing!" - MB, California


The Osiris system is available in Double Wide and Triple Wide versions, in several finishes
"I was utterly stunned after installing several Osiris racks into my system. Everything improved, including the noise floor, clarity, transient impact, image solidity, and three dimensionality. If you haven't installed a top-tier rack like the Osiris into your system, don't even think about upgrading components and just get one. If you don't, you'll never know what your existing components can do."
- HK, New York

True state-of-the-art performance

Symposium is proud to announce the Osiris Rack: a modular, state-of-the-art component environment system with unique, patented features found in no other audio or video rack, at any price. The Osiris was designed with one purpose in mind: to advance the state of the art to the limits of the envelope, and provide the best audio systems with a groundbreaking tool to advance the pursuit of the ultimate in sound reproduction.

Don't confuse the Osiris with other rack systems! The Osiris boasts outside-the-box technology and convenience features found nowhere else. These include:

  • Compound Rollerblock® Isolation (patented)
  • Magnetic Bearing Bias (patented)
  • EMI/RFI "Faraday" shielding (exclusive)
  • component electrical grounding (exclusive)
  • superior shelf technology (no plastics, stone, woods, no sorbothane or rubber)
  • solid aircraft aluminum, modular frame
  • optional oxygen-free copper (OFC) frame (exclusive)
  • ISO vertical wave isolation (exclusive)
  • wire and cable management system
  • modular design adapts to your changing system requirements
  • several finish options
  • custom shelf sizes and configurations available upon request

Innovative technology and features elicit true state of the art performance from music and video systems.

The Osiris inherited its core technology from the widely acclaimed Isis Rack, which set new standards for rack performance. Osiris starts at the performance level of its progenitor and exceeds its benchmarks, with new features and expanded, refined technology.

Larger, Stronger Levels

Standard interior Osiris shelving is roomy enough for most components at 21 inches wide by 21.25 inches deep (53 cm x 54 cm) (note: other size shelf systems are available). XT "eXtended Top" levels with greater surface area accommodate even the largest turntables.

The Osiris shelf design increases rigidity and reduces shelf "breakup" modes for correct timbral preservation. Its four-post system ensures stability, strength, and ease of access.


ISO shelf levels provide well-damped, non-resonant vertical wave isolation for reduced distortion.
Enhanced ISO Vertical Wave Isolation System

"ISO" damped vertical isolation levels are available to provide an extra dimension of precision-damped isolation without the "bounce" or transient bloating caused by more common (and almost universally used) polymer-based isolation padding found in most isolation rack systems.

The ISO system, in conjunction with patented Rollerblock® Compound Isolation, gives dynamic, musical, unsurpassed sonic results with all types of components - from analog turntables to the heaviest "monster" amplifiers.

Electrical Grounding of Components

The Osiris' high quality stainless steel shelves provide effective (>20 dB at microwave frequencies) shielding from electromagnetic fields. Electrical grounding connections on each of the shelves, an industry exclusive, provide a conveniently placed, direct electrical connection to the chassis of a component on that shelf.

Electrically grounding the component to the Osiris' EMI/RFI-shielding shelves, coupled with the ability to ground the rack to a dedicated earth ground, reduces distortion from electrical field interference. This is an industry exclusive feature not paralleled by any other rack system.

Rear terminals allow for electrical grounding of components.

Optional OFC (Oxygen-Free Copper) Leg System

What's even better than solid, aircraft-grade alloy aluminum? There's only one practical candidate in nature - solid oxygen free copper, the best practical material for any rack or stand support (only pure silver would be a better mechanical conductor, but is not practical). The leg system of an equipment rack is of vital importance; its quality affects all aspects of sonics, including bass, imaging, harmonic integrity and more. Symposium racks have always been constructed of solid aluminum, which is superior to steel, brass, wood, plastics, and hollow metal tubing - even if filled with lead or sand. Filling hollow legs with lead shot or sand is done to damp the severe resonance of hollow tubing, a problem that does not exist with solid aluminum or copper legs (which are self-damped and acoustically "dead"). Lead shot or sand fill also does not improve mechanical grounding efficiency, which is the primary function of an equipment rack's leg system and absolutely critical to rack "performance."

All Rollerblock Modules in OFC Osiris Racks are supplied in special edition 7075 aluminum version (as shown in photo at right), made with premium grade, super-strength 7075 alloy and hand-polished to a near-mirror finish.

Optional OFC legs are hand polished to a high luster.


Note: Do not confuse copper plated legs with solid Oxygen-Free Copper legs! Copper plating is decorative only; solid copper is unsurpassed for grounding and results in superior sonic performance.


Value and Innovation

A departure from conventional or "status quo" approaches to equipment support, one which has been forged during more than two decades of experience in the study, design and execution of practical, effective, and musically superior vibration control solutions which are based upon documented and known principles of physics and wave propagation. What may be of greater importance, however, is that Symposium customers around the world know our products routinely outperform competing products which cost more; our products always provide the greatest value for the dollar, regardless of which part of the budgetary spectrum their price may occupy. With its matchless intrinsic materials quality and design innovations, the Osiris Rack will, quite simply, bring you closer to the experience of your favorite recordings than any other rack system in the world.

The Osiris is our flagship rack system, every part of which is made with pride and attention to detail. For further information or pricing on the Osiris, please call or email Symposium directly, or consult your dealer. Since the Osiris, like the Isis before it, is a completely modular rack system, you'll be able to configure it as your requirements demand, and modify it at any time as your system changes through the years.


US Retail Pricing
For US Retail pricing, please contact Symposium or a local dealer for pricing on popular rack configurations. The Osiris System is completely modular and can be configured in virtually ANY iteration desired, and can even be modified at a later date as your requirements change. Also, please be aware that there are options available that are not on the website, and you can request more information if needed via email.

IMPORTANT: Please note that if you are NOT in the USA, your local pricing will differ due to shipping, VAT, local import duty, etc. etc. Please consult with your local distributor for pricing in your country. If you do NOT have a representative in your country (see our "Dealers" page for a list of authorized representatives), please contact Symposium for Overseas direct pricing via email or via telephone at 1-973-616-4787.

Please call or email for more information on the Osiris Rack system