Shuguang Treasure Vacuum Tubes – Select – NEW!

We are adding back in KT88-Z, 6CA7-Z (EL34), 300B-Z, CV181-Z (exact replacement of 6SN7) and the most recently 6SL7-Z (exact replacement of 6N9P) models of Shuguang Treasure black bottle tubes with our newly formed quality control collaboration with Shuguang tube factory.

We discontinued our offering the Treasure tubes in 2011 as the original ‘Treasure tube’ design team left Shuguang to form their own company ‘Psvane Audio’ – (check our catalog for Psvane tube offering). From 2011 to now, Shuguang has restructured its design team but the Treasure tubes have been sold through various channels with no clear quality indication. Grant Fidelity now has formed special collaboration with the Shuguang quality control team to ‘select, screen and supply’ tubes that Grant Fidelity deem to pass our quality requirement. These tubes have plain kraft carton packaging with original ‘Treasure’ logo and ‘GF Select’ printed on each tube. This entire Select series of tubes  are ONLY sold through our website and not through any other vendors in order not to have mixed with unknown quality tubes. Please purchase directly online with absolute confidence. 

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