Tung-Sol 6550 Reissue
The Tung-Sol name and trademark have been acquired by the New Sensor Corporation. This new production Tungsol tube is manufactured at their Xpo-Pul factory (also known as Reflektor) in Saratov, Russia. New Sensor is an American corporation and since taking ownership of this factory has been steadily improving the quality of current production tubes.
The new Tungsol 6550 has been closely constructed to the original specifications of the triple getter, 3-hole plate version. The build quality is top notch and the price is great, making them an excellent alternative to expensive NOS tubes.
Other Tung-Sol tubes 6550 Tube Types
Additional Information and Downloads
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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
Tung Sol 6550
I have had these tubes for roughly 2 months and they sound awesome! They are very neutral & excellent sounding though, allowing your preamp section to truly represent the amp. I play with a boutique guitar amp and all I can tell is that these tubes made a huge difference in the sound of the amp.
I have these on
an ARC D-70 mk2 so far so good. Not as good as the original ARC Philips. Good for the money.
by Bill Cox
I put these tubes in both my vintage Ampeg V4 and my Ampeg SVT-VR, I couldn't be happier, my V4 has never sounded this good, had groove tubes in it before but didn't sound this good. Way more bottom end, nice chirpy midrange and more treble than you"ll ever need. Very musical sounding. I also installed the Tung-Sol 12ax7 and Tung-Sol 12au7 tubes, great combination!!!!!
Every Bit As good as
These are 100% equal to, in every way, the Tung Sol 6550 tubes made in NJ, USA in the 1960's. Period. Anyone that tells you differently is sniffing "mojo" fairy dust. As a matter of fact, most of the Tubes made by New Sensor, JJ and Shugaung are as good as their US and European 1960's -1980's made predecessors. The 12AX7 types and rectifier tubes still have a little ground to make up but they are getting there. It's true that tubes made in the 1950's were, without a doubt, better tubes. They sound noticeably better and they are still running 60 years later. It was probably due to the cost availability and purity of the metals used to make them -they were very wasteful in those days. But the Tubes made in the 60's 70's and 80's, even though they sell at astronomically high prices, are on average, not better sounding than tubes made today by the major Russian, Slovakian, and Chinese manufacturers. I have proven this to myself over and over again, in side by side listening tests. To sum this up, the Tung-Sol Reissue is, in every way a "real" Tung-Sol 6550. I've been using them in Hiwatt and Orange amps since New Sensor introduced them without a single failure and with great "tone" although 6550 tubes were never noted for all around great tone (if anything these purpose built Tung Sols from New Sensor sound a little better in audio applications than the grey plate versions from the 60's ). Stop wasting your money using rare, irreplaceable NOS tubes in your guitar amps and support modern tube manufacturing. Any other advice is Hype and "mojo".
maybe matching is not right
by jong lee
I had 2 of this for my audio research ref5seI only used one of them about 500 hour.To me sound is very dull and no depth.I have to keep volume up to get a better sound.I didn't have a test tool so i am not sure it was just this one orall tung-sol is not right for arc amp.
TRUE, no depth, boring sound
Nice Transparent Tube
I bought these to use in ARC Ref 300amps but I ended up having return the amps. I used them currently in a pair of McIntosh MC2301 monoblocks over the stock KT88s. I ended up preferring them as they were essentially more transparent and I liked the tighter bass. The stock KT88s had similar tonality and little more bottom end (but not as tight) and little bigger picture but were "darker", I ultimately preferred the reissue Genalex Gold Lions (Soft) which had the best of both worlds, bigger sound-stage, transparent and nice deep and tight bass. I think the Tungsol 6550s will be great in amps designed for these tubes.
Tung Sol 6550 Re-Issue in bass guitar amp
These sound great in my bass guitar rig! They are loud and very full sounding with excellent bottom end response. My only complaint is reliability. One tube lost its vacuum and died after about a month in the amp. Another failed within the first year. I like the sound of these tubes and the price is good.
NOT up to par with NOS 6550
I've A/B'd these several times with NOS Tung-Sol 6550s and RCA-branded Tung-Sol 6550s (tests were blinded with the help of a buddy) and they do NOT sound the same as the NOS tubes as another review claims. The reissues are slightly darker sounding and lack some of the detail and high-end sparkle heard with the originals. The amp used was a 70s Traynor yba-1. I much preferred the clarity and evenness of the sound from winged -C- 6550s, though they don't quite capture the warmth of the NOS Tung-Sol 6550s. These aren't bad tubes, but I found the winged -C- to be less muddy and preferred them overall to the current production Tung-Sol tubes. I rate them a 3.5, the winged -C- would be a 4.5, and the NOS Tung-Sol get a rating of 5 as they are the best I've heard so far.
Nice warm balanced sound
I like these tubes. I have little experience with my new Cayin a-88T amp and 6550's although I have compared it to my solid state Perreaux and other tube amp. With the Cayin, it has top end NOS RCA pre-amp/driver tubes and the sound is quite bassy, and lack bit of sparkle but also retain good control of the top end octaves. Vocals are quite nice and overall the tube has a nice warm presentation and the bassiness was remedied quite easily with the on board speaker crossover gains for a quite nice comfortable sound. Although I also Iike detail - I prefer to listen to my vinyl warmer and longer than 30 minutes and I am sticking with the Tung-Sols and keeping my money.