SoundStage! ULTRA Review | A Luxurious Full Set: Siltech Royal Single Crown Cable

If you’re sitting in front of your audio system right now, I’d like you to consider how you choose your equipment. Is it solely based on sound quality? Does the appearance of the equipment matter? How well do the components match? Of course, sound quality is paramount; a system that sounds bad is a complete failure, no matter how good it looks. But how do you weigh appearance, performance, and luxury on your personal scales?

As for my personal system, I’ve always paid great attention to appearance, taking pride in wiping, dusting, component placement, cable organization, and wiring. I always keep a can of Tirox Speed ​​Wax polish and a microfiber cloth on hand. I want this system, which sits at the front of the room like furniture, to look as good as it sounds, and it sounds excellent, without a doubt.

If you don’t mind, I’d like to put the concept of sound quality aside for now. High-end audio cables are luxuries, like watches, sports cars, and handbags. When buying a set of cables for an audio system, you’re concerned with two things: needs or desires (or more likely, a combination of both). For most people with average financial means, needs obviously come first. For example, the speaker wire must fulfill its function—it must have sufficient wire diameter to transmit the signal, and its inductance and capacitance must be within reasonable tolerances. The insulation also needs to be strong enough to function properly in home use. Beyond these basic specifications, priorities must also be considered.

Let’s indulge in a temporary fantasy. Suppose you’re not only richer than God, but also have absolutely no patience for thrift. You’ve just expanded your garage to accommodate more cars—it’s now filled with Lamborghinis and Bentleys, along with your vintage Aston Martins and Corvettes, and you’ve just ordered a new Porsche 911 T. It’s time to take the Bentley for a spin, but as you pass its parking spot, you notice the tires on your Aventador look a bit worn. Perhaps a scratch on the sidewall makes you shake your head in displeasure. You point this out to the resident mechanic, instructing him to replace the tires.

So, where will the assistant source these new tires? Will he drive to a discount tire shop and have them install a set of Toyo all-season tires? Almost certainly not. He’d call the dealer and have them install a set of factory-fitted Pirelli Prestige tires, which might cost five times more.

The next time you drive your Lamborghini through the mountains and corners, will you notice any difference? Probably not. On the track, at the limit, an experienced driver might be able to distinguish between Pirelli and Toyo, but in everyday use, the difference is negligible.

But you’ll know that those cheap tires don’t do justice to this $500,000 car. Unacceptable.

Now that you’ve got the thought experiment in mind, imagine you’re working on a sound system for your Hampton mansion, and the builder better get it done before summer. You’ve spent a lot of time browsing reviews on SoundStage! Ultra and have some ideas.

Those Estelon Extreme speakers you saw at the 2025 Florida International Audio Show look beautiful, and Thorpe seems to like them too. He also raves about the Vitus amplifier. This will be the heart of the system. Now all that’s left is the source and the wiring. We can talk about the source material later. Perhaps you’ll fly to Munich on a private jet for the 2025 High End Audio Show to experience firsthand which turntable suits your taste best.

Speaking of cables, we encounter a supporting character somewhat similar to tires. Most people, including myself, go to Costco to buy tires, picking the ones that fit and are on sale. But you never buy discounted goods in your life, and you’re not planning to start now. The cables you choose for this million-dollar system must match the scale, quality, and status of this top-of-the-line equipment. You want the best. The system will be housed on either side of a two-story fireplace encased in massive white Carrara marble, with floors paved with hand-saved timber from the last tree of a certain species.

I push this analogy to its extreme to illustrate a point. A sound system is, from beginning to end, a product of desire. Nobody needs a sound system. But once you decide you want to listen to music with something better than your phone, unless money isn’t an issue, you need to decide on a budget.

SoundStage! Ultra’s motto is to largely ignore budget considerations. We focus on pushing the limits of audio performance, and this comes at a price. However, value is important to me, so while I understand the concept of “no price ceiling,” getting into that mindset isn’t easy. But I’m working on it.

A month ago, I received a complete set of Siltech Royal Single Crown cables, and, as you can see from the accompanying speaker cable review, I was quite fascinated. I requested the whole set so I could start with the speaker cables, test them individually, and then evaluate the sound changes after switching to the full Siltech system.

I think it’s necessary to point out that the Royal Single Crown series isn’t Siltech’s top-of-the-line product. The Royal Crown series includes Single Crown and Double Crown versions, as well as the separate Triple Crown series, and the new Master Crown series at the top. Upgrading within Siltech’s product line, from one Crown to the next, involves an increase in conductor diameter, extra attention to dielectric materials, and a greater focus on aesthetics. Of course, the price increases accordingly. Hampton’s system? I believe you’ll agree that only Master Crown cables deserve this.

The Royal Single Crown series is Siltech’s entry point into the high-end technology market. It’s in this series that Siltech’s S10 Monocrystal Silver, hexagonal geometry, and DuPont Kapton, Teflon, and air dielectric materials are combined. While further upgrades to the Royal Crown series involve thicker conductors and more expensive connectors, the Royal Single Crown cables seem more suitable for my system, which isn’t installed in a room with a huge fireplace and rare, precious wood floors.

Although this batch of Siltech cables didn’t arrive on pallets like many of the products I’ve recently reviewed, the boxes were larger than I expected. Befitting this type of luxury, the packaging is impressive. Each Royal Single Crown cable is housed in its own large, sturdy box with a flip-top cover reminiscent of book pages.

The first box I opened contained a power cord, which helps explain the box’s large size. The plugs themselves are bulky and quite heavy, as they are machined from solid aluminum. Both ends are fitted with their own fabric protective sleeves with drawstrings to protect the plug’s finish during shipping. I first saw this type of sleeve when I reviewed the Crystal Cable Art Series Monet speaker cables in September 2023. Since Crystal Cable and Siltech are both part of International Audio Holding, some idea sharing is understandable. While these sleeves aren’t strictly necessary—see my previous commentary on desires and needs—they are very thoughtful, considering the cables frequently come into contact with the floor and other equipment. These sleeves protect the hard, finely anodized parts of the cables from accidental impacts with other hard surfaces.

A rundown of the received goods: three power cords, two pairs of XLR balanced cables, one tonearm cable, and the aforementioned speaker cables. To date, I’ve only listened to the Royal Single Crown speaker cables, but I’ll soon be plugging the other cables into my system. Next up is the tonearm cable, which will connect my VPI Prime Signature turntable and EMM Labs DS-EQ1 phono preamp; you’ll read about that in the upcoming “For the Record” column. I’ll connect the signal cable between the DS-EQ1 and (currently) the Simaudio Moon Evolution 740P preamp, and then to the Hegel Music Systems H30A power amplifier.

These three power cables will bring the DS-EQ1, 740P, and H30A to life, although I’m very eager to try one on the VPI’s motor. I have a lot of work to do, and as an opportunity to do all this rewiring, I’ll take this chance to clean the dust that’s accumulated behind the rack.

To be continued…