Mullard 12AX7 / ECC83 Preamp Vacuum Tube

FEATURES

• Reissue of the classic Mullard 12AX7 / ECC83
• Warm, smooth tone with low noise floor
• Large soundstage with detailed response
• Factory-selected for low noise and microphonics
• Ideal for hi-fi audio, guitar amps, and studio gear
• Filaments housed within plate structure (minimal glow is normal)
• Manufactured at the Reflektor (Xpo-Pul) factory in Saratov, Russia
• Backed by New Sensor’s commitment to modern quality standards

DESCRIPTION

The Mullard 12AX7 preamp tube is a faithful reissue of one of the most revered vacuum tubes in audio history. Designed and manufactured by New Sensor at the Xpo-Pul factory in Russia, this new production tube carries the Mullard name with pride—delivering the warmth, clarity, and vintage tone that made the original a favorite among audiophiles and guitarists alike.

With its larger-than-average plate structure, the Mullard 12AX7 offers a full, dimensional soundstage, detailed articulation, and a smooth tonal character that resists the harshness or fatigue often associated with other preamp tubes. Despite its size, microphonics are not a concern—each tube is carefully selected to ensure minimal noise and maximum reliability, making it a standout choice for studio, stage, or hi-fi use.

Real-world testers praise its consistent transconductance and quiet operation, comparing it favorably to vintage NOS (new old stock) samples. While it may not be a high-gain monster, its rich harmonics and smooth response make it ideal for tone chasers seeking depth without distortion.

An important note: The reissue Mullard 12AX7’s filament is nearly completely encased in the plate structure. If you don’t see it glowing, don’t worry—that’s completely normal and part of its unique construction.

Whether you're upgrading your amp, preamp, or outboard gear, the Mullard 12AX7 delivers vintage tone with modern precision.