Emission Labs EML300B Matched Pair Direct replacement for WE300B

Emission Labs' 300B vacuum tubes are designed to replace the original Western Electric E300B tubes manufactured through 1988, with identical glass height and diameter. This vacuum tube inherits the sound quality and characteristics of the traditional 300B while providing an even more modern, high-quality acoustic experience.

Features and Advantages

Stable sound quality and low distortion
EML's 300B offers extremely low hum and low distortion for the majority of its lifetime, thanks to its unique filament and grid construction. In particular, the gold-plated grid provides bias stability and retains the match when used in pairs over time.

Adaptability to speakers
The 300B is designed to be moderately loaded with respect to speaker efficiency, which means that it interacts less with the speaker, and thus its sound quality is more dependent on the characteristics of the tube itself. This allows the EML 300B to combine the high output and low distortion that amplifiers demand from vacuum tubes to express music without distortion.

Long Life and Durability
The EML 300B has a high expected lifetime and maintains stable performance, especially when the amplifier is subjected to high loads. based on Western Electric's 1950 data sheet, EML also recommends a maximum dissipated power of 36W, but recommends not exceeding this limit in normal operation We recommend that this limit not be exceeded in normal operation. For operation under extreme conditions, we recommend considering EML's 300B-XLS.

The EML 300B is favored by tube amp enthusiasts for its ability to reproduce the warm sound of the classic Western Electric 300B, while offering superior durability and stability. Combined with a single-ended, no-feedback amplifier, you can enjoy a unique, rich, and natural sound.

• Gold-plated grating.Several advantages include improved bias stability, protection against accidental overloads, and improved linearity of tube curves.
• Soft Rubber Suspended Tubing
• BaseTungsten carbide construction.Hard metal anodes have a more accurate anode distance and do not change shape due to heating or mechanical shock. This ensures reproducibility and long-term stability of tubing parameters.
• Two oversized getters
• Hand-blown glass sphere
• Anti-microphonic anode and grid suspension
• These tubes are shipped in high quality dual boxes.
• Tubes printed with real gold (metal), red is glass baked into glass
• Gold plated pins, black ceramic sockets (white bottom)

EML 300B filament rating

EML 300B Maximum Rating(Cannot be used at the same time)