Genalex - Gold Lion PX-300B

6 Reviews
SKU: GL-300B

Availability: Usually ships within 24 hours.

USD $‎205.95
In Europe during the 1930's the GEC (Genalex) / Marconi-Osram PX4 and PX25 power triodes were considered the finest audio triodes of their day. In keeping with the tradition of Genalex to provide the highest quality tubes, New Sensor has released the Genalex Gold Lion PX300B audio power triode. This tube is the highest quality 300B type available and is considered to be an upgrade in any 300B amplifier.

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

Other Genalex - Gold Lion tubes300B Tube Types

Additional Information and Downloads

300B Tube Reviews

Genalex - Gold Lion PX-300B 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

6 reviews

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Great tube


I really like this tube. Very free flowing. Lush and accurate. Highs are beautiful. More mid bass than other 300b’s. Probably the best 300b for the money.