Natural Sound CV181-T / 6SN7
Unlike a NOS CV-181 tube, the Shuguang CV-181-Z tube is a safe replacement in any 6SN7 circuit. It is not identical to the NOS CV-181 tube. However compared to other 6SN7 tubes, the Shuguang Treasure CV-181-Z tube has a much larger "ST" style bottle. The beautiful ceramic base is over-sized as well, measuring 1 3/8" (35mm) in diameter.
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.
The Shuguang Natural Sound tubes require additional parts selection (Including thoriated tungsten filament imported from Japan, high-density carbon anode metal from Germany, high-purity high-density graphite, and gold plated pins). Manufacturing quality control processes, improved vacuum techniques and additional burn-in time and testing.
These Shuguang Natural Sound tubes are their premium export grade and purchased direct from Shuguang in China. Beware of sellers selling for drastically lower prices on Amazon, eBay, etc as they will not be the same export grade tubes.
These tubes are packaged in boxed sets of two (matched pair). You need to order "2" tubes to receive this boxed set. If you order "4" tubes we will send a Matched Quartet whenever possible.
If you need one tube select "Single - White Boxed". When this option is selected we will send an un-matched tube in the quantity ordered.
Other Shuguang Treasure tubes 6SN7 Tube Types
Warranty Information and Return PolicyWarranty 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
The Ultimate 6SN7
by Lanny G.
Tube rolling is an obsessive, compulsive madness that can drive you to the brink of insanity...or am I (you) already there? I love the lush tonal qualities of 6SN7 preamps. My current favorite is the ModWright LS100. My growing stock of 6SN7's from other preamps didn't fair that well in the LS100. Of those my favorite is the 1951 Sylvania BadBoy, with black plates and 3 rivet holes. But the bass somehow disappears in the LS100.Bass and dynamics with the stock EH tube and its gold pin variant are wonderful, but there's no air and space or any of that famous 6SN7 lushness of tone with these tubes in the LS100. I was about to give up when I tried the Shuguang Natural Sound. Though really pricey (damn!), these are far and away the best tubes I've heard in the LS100, including the Sophia Electric.Like the EH tubes they play louder, are dynamic as hell, and have amazing bass impact and depth. But they also have that 6SN7 lushness, spaciousness and air in spades in the LS100. An amazing tube that you can listen to and get lost in the music for hours. This is what it's all about...at a price.