Engineered Exclusively for High Fidelity Audio

We took everything we learnt from developing our CORE and SELECT lines and asked ourselves a simple question: what’s missing from the tube marketplace? Our answer is the RESERVE Collection—tubes designed from start to finish with hi-fi audio in mind. No shortcuts, no cut corners, no expense spared.

Product development is an iterative process. The best way to meet the needs of our partners and customers is to engage with them and learn from them. Our RESERVE tubes are the pinnacle of that process.

Bespoke Design and Small-Batch Production

We’ve pulled out all the stops for the RESERVE Collection. Every step of the production process is fine-tuned to ensure the highest quality possible. It’s tricky, painstaking work, which is why we can only make RESERVE tubes in small quantities—but it’s worth it.

First we optimize the design of each tube’s glass bulb to improve heat dissipation and longevity. Next, we use only high-purity metals in the tube’s construction, which minimizes the likelihood of flaws that could impact sound quality or even cause tube failure. When it’s time to put the “vacuum” in “vacuum tube,” we take our time removing the air. For most tubes, this step is very quick, and that’s good enough—but RESERVE isn’t about “good enough.” We take our time.

Finally, we apply our Magic Coating. This is a layer of monocrystalline carbon that improves electron flow, helps with heat dissipation, and blocks out noise. The end result? Tubes that sound better, longer.

A Legacy of Exceptional Sound

The 300B is nigh legendary in audiophile circles. The KT88 is so beloved, New Old Stock is almost impossible to come by. With the RESERVE Collection, we’re paying our respects to the storied history of tube audio by creating the best versions of the most widely-used tubes in hi-fi audio.

Vacuum tubes aren’t just electrical components–they’re objects with a rich and varied history. That’s why the RESERVE Collection isn’t about a singular signature sound, it’s about each individual tube. When you listen to a 300B RESERVE tube, you’re hearing a century of history paired with the most up-to-date manufacturing methods.

Whether it’s the powerful bass and dynamics of the KT88 RESERVE or the emotional warmth of the 6SN7 RESERVE, the Ray Tubes RESERVE Collection redefines the definitive experience for each and every tube in our lineup.

Unparalleled Quality Control

We put our RESERVE tubes through the wringer to ensure quality and consistency.  That’s why we offer the Ray Tubes One Year Warranty against any and all manufacturing defects, and why you can enjoy total peace of mind.

The quality control process for our RESERVE tubes is as meticulous as every other aspect of their production. Each tube is assigned a unique identifier that allows us to track it through a series of tests. If the tube fails a single test, it doesn’t make the cut. 

From the soldering onwards, our engineers put the tubes under a microscope—literally. We know how frustrating it is when a tube doesn’t behave as expected or fails outright, and we’re committed to making frustration a thing of the past. That’s what peace of mind is all about.

The Ray Tubes One Year Warranty

Most vacuum tubes are notoriously fickle. That’s why warranties are rare. But we trust our products and we’re proud to offer our One Year Warranty against manufacturing defects.

You’re Not in Kansas Anymore

You’ve heard enough from us. Now we’ll let the experts do the talking–people like Don Sachs of Spatial Audio Lab. His verdict? “This tube will kill the holy grails” of New Old Stock. He’s not alone in turning to Ray Tubes. Leading tube amp manufacturers like xDuoo, Audiopax, and Linear Tube Audio all ship their amps with our tubes.

And it’s not just the manufacturers—reviewers are also overwhelmingly enthusiastic. Some were excited to finally find a new production tube that outdid the performance of NOS. Without fail, they list Ray Tubes RESERVE tubes among the very best. Our personal favourite review is from Lachlan Fennen of Passion for Sound, who was so blown away by the 6SN7 RESERVE he felt inspired to go find an amp that would live up to the tube’s potential.

We could spend pages detailing the very smart people who have said very complimentary things about our tubes. We’ll spare you, because Don Sachs already said everything there is to say about the Ray Tubes RESERVE Collection: “Suddenly, you’re not in Kansas anymore.”