Rediscover the legendary tone of the 90s with this authentic NOS (New Old Stock) Marshall ECC83 / 12AX7 preamp valve pack, available exclusively at British Audio. Each box contains three factory-sealed valves, preserving the unmatched sound quality that made Marshall amplifiers iconic.

Why Choose These Valves?

• Authentic Marshall Tone: Experience the warmth, clarity, and dynamic response that defined an era.
• Crafted in the Legendary Svetlana Factory (SED): Produced at the renowned Svetlana Electron Devices (SED) factory in St. Petersburg, Russia, celebrated for its exceptional tube craftsmanship.
• Factory-Sealed Condition: Pristine, untouched tubes straight from the original 90s stash.
• Rare Collector’s Item: Limited supply of 3-tube packs, available only at British Audio. Once they’re gone, they’re truly gone.

From the Back of the Box:

"As the world’s largest valve users, Marshall has the respected influence to demand improvements that lead to the best quality, increased reliability, and the high levels of valve performance that today’s players demand. Before packaging, every valve is tested by a Marshall engineer so that when you purchase our replacement valves, you can be certain that every one is a Marshall Grade A. You can rest assured that whenever you perform, Marshall valves will give you unrivalled sound quality."

Technical Specifications:

These ECC83 / 12AX7 valves, produced at the SED factory, are prized for their tonal richness and reliable performance:

• Amplification Factor (μ): 100
• Transconductance: 1.4 mA/V
• Plate Voltage: Up to 330V
• Heater Voltage: 6.3V or 12.6V
• Heater Current: 300mA at 6.3V; 150mA at 12.6V
• Plate Dissipation: 1.2W per triode
• Cathode to Heater Voltage: ±200V

The SED factory was known for its meticulous production processes, ensuring low microphonics, robust build quality, and unparalleled tonal character. These features make these valves ideal for amp restoration, tone enhancement, and professional performance.

Important Note:

Due to the vintage nature of this item, returns will not be accepted. Please review your purchase carefully.

At British Audio, we’re passionate about offering rare and exclusive finds like this. Whether for amp restoration, tone enhancement, or simply owning a piece of Marshall history, these valves are an unparalleled addition to any collection.