Ray Tubes
RESERVE EL34
The Ray Tubes RESERVE EL34 is the distillation of decades of experience. With a bespoke design, small-batch production, and meticulous selection, the Ray Tubes RESERVE Collection reveals audio details you never knew were there.
Hand selected and tested, the Ray Tubes RESERVE EL34 is designed specifically for hi-fi audio applications. Featuring gold-plated pins and our monocrystalline carbon Magic Coating, the RESERVE Collection easily outperforms New Old Stock and new production alike. Fewer than 5% of production meets our standards.
The EL34 is a power pentode vacuum tube that was introduced by Mullard in 1955 and is usually found in an amplifier’s final output stage. Befitting its British origins, the EL34 was commonly used in amps built by companies like Marshall and Vox—as such, it became associated with British music of that era.

Sound Characteristics
The RESERVE EL34 offers solid and powerful low frequencies, balanced and full midrange, clear and bright high frequencies, and excellent resolution. Its wide dynamic range and expansive soundstage with rich layers make it ideal for dynamic and complex compositions.
Bass Performance
Solid and powerful, able to clearly showcase the layering of low frequencies. It is suitable for dynamic and complex music compositions like rock and electronic music.
Midrange Performance
Balanced and full, with excellent detail reproduction, especially in vocals and string instruments. The sound is clear and natural, with rich layering and warmth.
Treble Performance
Clear and bright, transparent and delicate, with excellent resolution. Presents more audio details while avoiding excessive harshness or interference with other frequency ranges.
Dynamics and Soundstage
Wide dynamic range, effectively capturing the contrast between loud and soft passages. Expansive soundstage with rich layers and a good sense of space, especially suitable for large-scale compositions and complex sound design.
The RESERVE Collection
The Ray Tubes RESERVE Collection isn't for everyone. It’s the distillation of decades of experience. With a bespoke design, small-batch production, and meticulous selection, RESERVE reveals audio details you never knew were there.
Engineered Exclusively for High Fidelity Audio
We took everything we learned 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.
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.
More Details
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. Click here for details.
Compatible Amps
Click here to explore Ray Tubes' Tube Amp Compatibility List.
Package Contents
Technical Specifications
Tube Type: EL34
Tube Socket: 8-pin
Max Anode Dissipation Power: 25 W
Max Screen Dissipation Power: 8 W
Output Power in Class A1 Amp (Single Tube): Greater than 10 W
Output Power in Class AB1 Amp: Greater than 35 W
Max Anode Voltage: 800 V
Max Screen Voltage: 500 V
Max Grid Voltage: ~15 V
Heater Voltage: 6.3 V
Heater Current: 1.5 A
Transconductance: 11 mA/V
Amplification Factor: 11
Internal Resistance: 15 kΩ
Tetrode Connection
Screen Voltage: 250 V
Anode Voltage: 250 V
Anode Current: 140 mA
Grid Voltage: 15 V
Grid Current: 3 mA
Internal Resistance: 12 kΩ
Amplification Factor: 8
Triode Connection
Anode Voltage: 250 V
Anode Current: 143 mA
Grid Voltage: 15 V
Internal Resistance: 670 Ω
Amplification Factor: 8
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