Electro-Harmonix 300B Gold Grid Power Vacuum Tube (Matched)

1 Review
SKU: EH-300B

Availability: Usually ships within 24 hours.

USD $‎159.95

Need matched power tubes? Don't worry! Price includes matching in any quantity you need for no extra charge. Need a matched pair? Just order "2" tubes. For a matched quad order "4" tubes. Matched sextets and octets are available as well.

The Electro Harmonix 300B Gold Grid vacuum power tube produces a warm and inviting sound, with a depth and richness can captivate the listener. The midrange is where this tube truly shines, offering a lush and detailed presentation that breathes life into vocals and instruments. Whether you're listening to jazz, classical, or rock, the Electro Harmonix 300B Gold Grid power tube delivers a nuanced and engaging performance. The bass response is both tight and authoritative, providing a solid foundation for the music without sacrificing definition. High frequencies are done with finesse, ensuring that the overall presentation remains balanced and fatigue-free, even during extended listening sessions.

Improving upon standard 300B tube grids, which are typically made of pure nickel, the gold plating reduces grid current and adds effective improvements to the overall grid function. Given that all triode power amps draw some amount of grid current whether they're playing softly or at full blast, this stabilizing effect will offer enhanced sound and durability.

Long life, top-quality construction, and great tone make it one of the finest 300B vacuum tubes available today. Like the original Western Electric 300B tube, it has the 8 course directly heated filament, 40 watt plate dissipation, classic large shoulder tube glass, and are precision matched. The EH 300B tube's plate curves and static DC characteristics (plate resistance, transconductance, mu) also exactly match the originals so you can drop them into any vintage or modern 300B tube amp. For the money the 300B EH tube is a fantastic tube!

Be sure to read the great 300B tube review and comparison from the Wall of Sound.

Other Electro-Harmonix tubes300B Tube Types

Additional Information and Downloads

300B Tube Reviews

Electro-Harmonix 300B Gold Grid Datasheet (PDF)

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Warranty Information and Return Policy

Warranty Period: 3 months

All our tubes are guaranteed for 3 months from the date of purchase. (Any exceptions will be noted on that tube's Warranty tab)

If you receive a tube that does not perform to the manufacturer's specifications, please do the following:

- contact us to get a return authorization
- return it via regular mail within 90 days from when we shipped it, and we will provide an exchange or refund of the full purchase price of the tube.

Returns not related to warranty or defect will be considered at our discretion, and are subject to a 15% restocking fee.

We can not accept returns that don't have an authorization, are past 3 month, or are returned improperly.

These guidelines may be updated without notice.

Ratings & Reviews

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Value Champ in my comparison review


I recently reviewed the whole fleet of 300B tubes, and spent a lot of time with the EH-300B Gold Grid. This is a great sounding tube. It wasn't "the best: at anything, but it had no weaknesses either. And the pricing is excellent compared to the others. For my full review see my website, www.wallofsound.ca