Horizon Series CV181-AT / 6SN7 Vacuum Tubes for Amplifier Matched Pair

I ordered a matched set of PSVANE Horizon 6SN7 tubes for my new Schiit Freya+ F. It took about 10 days to two weeks for them to arrive. Of the four tubes in the Freya, I replaced the right two tubes with the PSVANEs and used tube savers to raise them. There was a noticeable improvement in sound. It was a richer and broader sound over the Tung-Sol tubes that came with the Freya. It was very noticeable, and I was pleased. This was my first experience with rolling tubes and I decided to try more. I then purchased two Ray Tubes Select 6SN7 tubes. I put them in the two right sockets and moved the PSVANEs to the left. The Ray Tubes sounded nice, maybe they were slightly better than the PSVANEs, maybe. They were definitely more expensive. After a couple of days, the Ray Tubes developed problems. I sent them back, and the manufacturer sent replacements. During that time I ordered two more PSVANEs. They arrived, and I put them in the Freya, so all four Freya tubes were PSVANEs. It sounded great. Again I was very pleased and think they are a great value. Later, the Ray Tube replacements arrived, and I put them in the two right sockets (gain stage). So two PSVANEs and two Ray Tubes are installed. My system sounds good, and I'm happy. I don't think the Ray Tubes were worth more than the PSVANEs. The Ray Tubes might be slightly more "tubey" sounding... maybe. But if they die, I will replace them with the PSVANEs, so all four are, once again, all four PSVANEs. The PSVANEs sounded a little tighter and more accurate to my ears. I don't want to spend more on tubes than I spent on the PSVANEs. They sound great, and I'd rather invest my money in upgrading speakers or other things. So, I can report that my four PSVANEs sound great and are on par with the more expensive Ray Select tubes. I'd recommend them to anyone. My experience was good.

PSVANE CV 181-AT HORIZON SERIES (6SN7) right out of the box is the best tube new or NOS I have heard in my Schiit Saga + pre amp. Usually swapping a tube makes a subtle improvement or no difference but I see no reason to look any further. The Horizon Series reviews are correct. I am over the top happy with this purchase. I bought the matched pair even though I only needed a single because that is the way Amazon currently sells them. Sound is subjective but I immediately noticed a balanced frequency response, a large sound stage, clarity and realism in vocals and instrument placement. Deep natural bass. I’m glad I purchased and would recommend to anyone.

I swapped these in for the 6SN7 preamp tubes in a Williston R8 stereo amplifier and am very happy with the result. The imaging and detail are greatly improved!

I bought two sets of these for my Schiit Freya+. So far after only 6 hours of use they have lots of power, deep taught bass, clear mids, and nice highs that cure some overly bright piano/keyboard notes on some of my LPs. The sound stage is very wide and deep and they also are what you could call holographic, and no sibilance. I'm very pleased with these, they sound as good as my 1950's Sylvania Chrome Top 6SN7GTAs. Buying NOS tubes can be a crap shoot, but with these you can send them back if they don't work out. *** I now have about 25 hours on these tubes and they are getting BETTER with every use, sound is well balanced, sweet highs and very detailed in the mid range. Bass not as prominent as when new, but that is a good thing detailed. Pink Floyd albums sound better than ever***

They last about two months. Played 3 hrs 5 days per week. Put the old tubes back in and everything is back to normal. Intermittent buzzing and tube noise gone. I thought I was upgrading to better tubes. The terminal pins aren’t made well, solder built up on the end of all pins.

I purchased these to upgrade my Schiit Freya+ pre-amp from the standard tubes. The first matched pair were returned after buzzing (microphone) sound appearing immediately on installation. Amazon were able to send out another pair quickly. The second pair did much better for around 50 hours before a low level microphone buzz consistency starts after around 1.5 hours of use. The buzz appeared a couple weeks after the return window closed, money lost, very disappointing. In terms of what they do when they are working properly - yes, they did improve the sound, a fatter bass, a slightly warmer sound, smoother overall. I can/could push the volume higher with less listening fatigue than the original tubes. I would be incredibly happy with the Horizons if they could work for longer than 50 hours.

Nice tubes with a good price.

Worked very well in my case. I enjoy the sound of my headphone amplifier. The other tube in center is a Mullard tube.

Beautiful tubes that sound fantastic. Clear, open, detailed and neutral. Dead quiet so far after 200+ hours. Will buy more.

Wow, was für ein Unterschied zu meinen Standard Mona Röhren, die mit dem Verstärker geliefert wurden. Hörbar ab der ersten Minute. Gut verpackt und schnell geliefert. Vielen Dank!

Was für eine hervorragende Röhre. Nach einigen Stunden Einspielzeit, kann ich nur Positives berichten. Die Auflösung ist fantastisch, die Bühne breit, die Mitten sind präsent, die Höhen nie aufdringlich und der Bass macht ordentlich was her, ohne zu knallen.

Good tubes at a fair price. I’m using them in a Willseton R8 together with the Horizon 6SL7 and they are a major upgrade over the stock tubes,

Sound good, as expected, the price can be lower though. I have ordered a bunch of Horizon series tubes and all have tinned pins for about a quarter/third of their lenght, on two of these tubes pins were having so much led on them that refused to plug into the socket. The pins are supposed to be gold plated, not tinned.