Les Lammers

I have bought from them too and have been pleased. Great seller.

Here is an excellent and free source. https://www.scribd.com/document/36723618/Taste-of-Tubes

With the speakers you have and the music you like consider a 30 watt integrated amp. If you are new to tubes I would pass on a vintage amp. Look at Jolida or Prima Luna. You are close to Upscale Audio near LA. I'd go visit them for a demo. It would be time well spent.

That is a nice amp. I stream Tidal via WiFi with an Arcam rPlay with a tube amp and MHDT Orchid Dac. The Arcam is connected to the Dac via SPDIF. It is controlled via the PlayFi app. The Arcam can also be connected with an Ethernet cable. The Arcam has an internal Dac that is not bad so you can add a better Dac later. Streaming via Bluetooth is a sonic compromise.

The photo you posted is of the early Shuguang Treasure 6ca7-z. They are not the same as the gray glass II's. The seller is BS-ing you and sent you a subpar set of tubes. Did you get them on the auction site? What do the readings on the little cards that came with the tubes? If the seller balks file a complaint with epay.

Try a pair of NOS 6L6G/GA tubes with a 5Y3 rectifier in your amp. These are the original 6L6's and you must use a 5Y3. I have had my Inspire for about 4 years driving Heresy III's and the 6L6G/GA sound wonderful. I tried 6F6's but prefer the 6L6G/GA. YMMV.

I have not used that tube but it is not the same as the 6ca7-T MKII.

Regarding the GLKT77 from Upscale Audio: A quick note on this tube: These tubes seem to take a bit longer to break in than some other power tubes, so if they sound a little lightweight in the bass, you have to give them time. Some guys are reporting at least 100 hours before the fully come into their own.

They are not the same tubes. I would send them back and get the tubes you wanted. I like the Psvane/Treasure tubes but many of the dealers are suspect. If I buy them on the auction site again I will contact the seller and ask for the test readings on the tubes I am to receive.

Check out the Inspire amplifiers that Dennis Had, founder of Cary Audio, is selling on the big auction site. It's his retirement hobby. They are single ended pentode and some are triode strapped. Point to point wiring and use one pair of tubes. 6V6-KT150's can be used with different rectifiers and they are self biasing. Very affordable and a great match with Klipsch.

I think you should try 6L6's. I just looked at the manual for you amp online. It states you should have matched pairs. 6L6G or GA's have the magic you are looking for but you need to call Quicksilver to see if they will work in you amp. The Tube Store preferred series 6L6GC is a fine tube and are $29.95 each and they will match them. The large bottle TungSol is labeled 6L6G but electrically a 6L6GC. They are more $$ than the preferred series. I would look for a pair of RCA , Hammond etc. 7247's that say made in England. There are relabeled Mullards. Look for seams on the top of the tube. That tells you they are Mullards.

The Dynaco ST70 is a classic tube amp. A perfect match for your Forte III"s. You can get it as a kit or assembled. You can easily sell it if you don't like it but....you won't want to. Bob Latino ST70: http://www.tubes4hifi.com/bob.htm

I've got about 60 hours on the 12AX7 Psvane Treasure Super tubes and it sounds awesome. They've got the 'authentic' NOS sound quality and man are they smooth. I believe the Preferred Series tubes are more rigorously tested and that is a good thing. Shuguang is the largest tube manufacturer in the world they made the original Treasure series. I bought one of the Sophia blue glass 6SN7's and it sounds better, in my rig, than any NOS I have and I've collected a lot of them over the past 20+ years.

New production tubes are getting much better. It is best to get them from a dealer that thoroughly tests them. Not all do. Look at the videos by Upscale Audio on you tube.