JJ 300B

4 Reviews
Out of Stock
SKU: JJ-300B
USD $‎179.95
These JJ 300B tubes are dual point matched for the best musical accuracy possible. Every pair is inspected at the factory and comes with test certificates for each tube. They are labelled as "JJ", and have an attractive white ceramic base.

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

Other JJ Electronics tubes         300B Tube Types

Additional Information and Downloads

300B Tube Reviews

JJ 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

4 reviews

RE this tube


I had purchased a pair of these 3 years ago and have no regrets. They sound great in my Cary 300SEI with good highs, mids, and bass. They are tough tubes as well.

Meaty, beaty, big and bouncy!


I recently reviewed the whole fleet of 300B tubes. The JJ is a big, heavy construction tube with a big, full sound - but still lively and fast. Excellent sonics overall. It had the best bass foundation, and was superb on percussion. For my full review see my website, www.wallofsound.ca

Works fine but . . .


This tubes have run my 300B Pro MDA (french WE91 version) for a very short period of time. Same thing with Sun Audio SV-300B. Flat sound without any magic or mystery 300B are supposed to sing. Compared with VA 4300B, Shuguang 300B-Z, or Shuguang 300B-98, those 3 were far away better. IMHO, the las choice you can make

Fantastic affordable 300B


The JJ is very durable and good sounding tube at a fraction of the cost of a WE 300b. Measures exactly like a WE 300B although it sounds very different. I actually prefer the JJ and EML 300B variants over WE. The JJ being the most affordable and EML sounding by far the best assuming you have deep pockets.