Shuguang Treasure 6CA7-Z

4 Reviews

Availability: Usually ships within 24 hours.

USD $‎97.95
The 6CA7-Z tube's construction features gold grid wires and a new internally coated black glass bottle. This unique HPCC coating is known as High Polymer Carbon Compound glass coating and is unique for its ability to reduce stray electron emission that can otherwise reflect off the glass. Shuguang also uses their new "Super Alloy" technology. Originally applied to aviation, aerospace, and military applications, this technology has been successfully used by Shuguang to accomplish directional solidification and single crystallization. This greatly improves the ability of electron emission and electron current stability. This new Shuguang Treasure series required additional parts selection quality control processes, improved vacuum techniques and additional burn-in time and testing. This Shuguang Treasure 6CA7-Z tube is their premium export grade and purchased direct from Shuguang in China.

If you are curious about how these fare in a hifi stereo amplifier be sure to read the Wall of Sound EL34 tube comparison for details.

Other Shuguang Treasure tubesEL34 Tube Types

Additional Information and Downloads

EL34 Tube Review for HiFi Audio

Tube Matching Information:
Power Tube Matching FAQ
Perfect Pair System

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

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Highly recommended!


I bought a quad for my Prima-Luna Dialogue 5 power amp.With 70 hour on them they sound wonderful.I understand they need 150-300 hours and yes the sound has changed dramatically since new.From top to bottom more musical with more resolution and emotion.The bass goes deep with power and accuracy. The top end is extended with out being bright. The mids are sweet and warm. Separation of instruments has been overwhelming and has been a huge, dramatic improvement. Without any doubt this is my best audio upgrade in years. Highly recommended!

These Tubes Are Well Worth The Premium Price

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The tubes have about sixty hours on them now in my Conrad Johnson CAV-45. I reiterate what Nigel has said in his review. In addition, to what he had said, what really stands out for me is the outstanding soundstage (wow!). The midrange is superb with a great sense of air, that only the best NOS EL34’s can rival. The bass is taught and accurate and the treble is clear and sparkling without being at all bright or brittle. The excellent service and support from thetubestore is the icing on the cake. Bravo.

Le meilleur


Le meilleur tube de puissance que j'ai eu.
The best power tube I had.

bad choice


bought a pair on march 16th, one blew up on september 7 !!!
And kill my cathode caps of my Jadis JA30 amps. To be repared.