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Premium Matching:

€34.90 *

In Stock

Part Number: RT101
  • RT211
  • 5x5x12 cm
  • 4251594900382
SOLD OUT  -  discontinued - no longer avilable, replaced by 6L6GCM-STR  Redbase... more
Product information "6L6GC-STR BLACKPLATE RCA-Style TAD PREMIUM Selected"
SOLD OUT  -  discontinued - no longer avilable, replaced by 6L6GCM-STR  Redbase
The Classic 6L6 Sound - Excellent Tone and Maximum Lifetime!
TAD has the remakes of the all time favorite 6L6 classics by RCA and GE. The TAD 6L6GC-STR is your perfect choice if you are up for the sound of the rock legends. It provides the low end with the right amount of pressure, as known from the famous RCA tubes. It has clear, transparent but unobstrusive highs and exactly the right bite to provide you with all those classic 6L6 sounds from big warm cleans to modern hard rock sounds.
This TAD 6L6GC-STR combines the famous reliability of the american made Philips/Sylvania STR series (also known as MESA 6L6GC-STR415) with the black-plate system of the highly regarded vintage RCA 6L6GC tubes. We joined best of both worlds! Silky top end, combined with deep bass response and lots of headroom make this tube a living classic. Our choice for lively clean sounds and powerful broadband multichannel amps.
Exclusive black-plate designs, gold gird wire, double getter construction, no-noise filaments and the 1.2mm thick heavy duty glass envelope.
Q: When does a power tube become a Premium Selected power tube?
A: All power tubes labeled Premium Selected have passed the following tests:
-      Plate Current (PC) and Amplification (TC)
-      Low Noise Test
-      Microphonic Test
-      Sonic Tests
-      Shock Tests
-      Listening Tests
-      Shorts & Leakage Tests
Premium RT-Matching of Power Tubes
Our Premium Matching is an exact matching of power tubes with identical Plate Current (PC) and Transconductance (TC).
TAD Premium Selected tubes are guaranteed for a period of 6 months (according to terms of warranties) for the quality criteria mentioned above.
Tube Type: 6L6/5881
Socket: Octal(8Pin)
Selection: Premium
Reviews 14
Read, write and discuss reviews... more
Customer evaluation for "6L6GC-STR BLACKPLATE RCA-Style TAD PREMIUM Selected"
19 Sep 2018

perfect tubes for my fender reissue model T. good deep bass tone.

16 Oct 2015

Great tubes.

Just got plugged these tubes into my Hugues & kettner Statesman Dual 6L6 and I'm really impressed by the tone they give.

Warm and mildy tone, sound very smooth.

Congrat's TAD, great job!

21 Oct 2012

I opted to try these TAD 6L6GC-STR's in my Fender Hot Rod Deluxe III as a means to improve a tone I was pretty happy. Before swapping, I biased the original power amp tubes to 68mv and did the same for the TAD's. Using identical volume and tone settings, I found a marked improvement in tone, headroom and sheer musicality. I've now installed TAD in the preamp stages (7025 WA Highgrade in V1 & 2, 12AX7A-C in V3). The only other change in the amp is an Eminence Cannabis Rex speaker. Overall, I'm exremely happy with these enhancements, and have received many compliments. I'll be sticking with TAD tubes, I like the quality too, and continue to recommend them to others.

30 Oct 2010

If you got Ampeg V4-B just get them. BEST, richest sound ever and probalby most powerful 6L6 on the market

15 Sep 2010

I just wanted to send you a note to tell you about my experience with the 6L6GC-STR tubes.

I custom designed and built a Class A amplifier system for Hi-Fi. I spent hundreds of hours on the project and used very high quality parts. It sounded terrific, and sounds better as all the parts \"run-in\". The amplifier has 45W RMS/channel, and uses a quad on each side. I had tried many different types of tubes and some were better than others. As you know, a Class A amplifier can be truly revealing so the tubes have to be good and the right quality.

I looked at the design of the TAD 6L6GC and decided to give them a try. I was impressed with the look and the fact they were designed in Germany - the home of great engineering. When I received them, I was very happy with the build quality and appearance. However, the real surprise was running them in my amplifier! These are fabulous tubes! They do something for the music unlike any other tube I have tried. And I have even tried the famous RCA black plates, and yes, these do sound better. In fact, I bias them at 68mA and I use PEARL tube coolers, so far, they have been extremely stable and I have about 300 hours on them with no bias drift. Fantastic!

I am now building the second amplifier - a clone of the first as I can bi-amplify my speakers - and will no doubt be using the TAD 6L6GC in that amplifier as well. I recommend them to anyone who wants a great tube in their home tube audio system!

Thank you


5 Apr 2008

I only got the matched pair -- plan on getting the quartet -- really really nice to see the dedication that TAD puts out -- WAY HIGH quality -- "TAD -- gives you wings..."

29 Jun 2007

Fully satisfied with TAD 6L6GC STR i have just installed on my Dual rectifier, instead of 6L6GC Mesa.

I play blues and rock and i have got a best

vintage sound , warmer , and more sustain with TAD tubes.

In addition they are cheaper than mesa tubes.

Many thanks to Stephan Meyer who help me to make the right selection for my DR.

Quick delivery.

I hope that TAD company will continue to ship

such quality products.

let's rock

7 Sep 2006

I have replaced my old tubes in my Fender the Twin "Red Knobe" with TAD6L6GC-STR. Now my Twin really kills. If I will destroy some of these tubes, I will immediately buy another one.

6 Sep 2006

I play classic hard-rock music, close to Black Sabbath from the 80'-90’ and Dio. I use Marshall 6100 LM Anniversary Series, Marshall 1960 AV cab and Gibson Les Paul Custom equipped with Seymour Duncan SH-4 & Alnico II Pro pickups or Fender Stratocaster USA CBS 1978 HSS (alder body and maple neck, no rosewood) equipped with Bill Lawrence L500XL & two L250 pickups.

I used to use Sovtek's 5881 and Groove Tubes 6L6R power tubes. The amp was screamy loud but not dynamic, my tone couldn't get out of the sound of the band. Besides, I had the same problem with my previous amp - Marshall JCM2000 DSL 100, where I tried JJ's, Sovtek's, GT's. I've changed the amp, the tubes, but the problem remained.

One of the Polish pro's advised me to use TAD's, which he uses in his Diezel. I've written to TAD and explained the problem. Both Andreas and Stephan have given me a helping hand, showed big patience to many questions :). Great thing guys!!! I was wondering if I should put GC's or WGC's, they advised me TAD 6L6GC-STR and that was best shot possible, for the style I play.

As for the tubes. I wanted my amp to be more flexible and dynamic and not to be screamy or fuzzy. And also I was interested in classic "80's era" overdrive. I've bought then matched quad of GC's and now my Marshall is the f***ing killer!!! Deep heavy bass, sweet mids and clear melodious highs. And most of all - TRANSPARENT ROUND SOUND. No screamy scratchy annoying noises, just pure valve overdrive. Big punch, huge dimensional and versatile sound. The tone is very round, "ballsy", so detailed and clear, no unnecessary noises. AT LAST!!! My leads flows from the amp alongside the rest of the band, my solos are now creamy and melodious.

Strongly recommended for everyone, who are unhappy with the tone. Read the reviews on FenderForum, there you can find the differences between GC and WGC and choose which tubes are the best for your amp. One thing is for sure - you can't find any better tubes than TAD. The guys do a great job selecting pearls from the crap.

So – if you are looking for a balanced round tone, with a bit of vintage – these tubes are for you. I think it’s possible to get “metal” sound also. Tone of TAD tubes is very versatile, so keep experimenting to achieve what you desire most. These tubes will give you many possibilities of creating your personal tone.

As for the preamp tubes the TAD guys advised me 12AX7-C for the tubes V1 & V3-V7 and HIGHRADE 7025 for the first gain stage tube - V2. I must say - that is the perfect combination. Read my review of 12AX7. If necessary write me at

17 Jul 2006

My Fender Blues Deluxe sounds great with a pair of this tubes...


13 Aug 2005

I tried the TAD 6L6GC's in a Marshall 6100 30th Anniversary amp, wich normally has Sovtek 5881 Tubes.

The sound is much bigger, and more defined then with the stock tubes. The bass response is almost scary,big and tight, especially with a 4x12" celestion Vintage30 or G12H cabinet.

The lead channel sounded like a Mesa dual rectifier with the TAD's.

I play pop,blues,rock,hard rock and metal, and ended up with the TAD6L6WGC tubes, they sound a bit more sophisticated in the Marshall, but if you play modern metal, or Nu-metal the TAD6L6GC's are the one you should try!!

If you got a Marshall with 5881 tubes, try the TAD's (6L6WGC, GC or both like I did), the sound improves a lot!!

And if you got any questions, Andreas Hecke answers them immediatly, so TAD got a good customers support to!!!

14 Jun 2005

Phenominal tube. I would have to say that this is the best "modern production" tube ive tried so far of the 6L6 type. I still have yet to see how long these tubes last, but sonically i have not found an equal. My next purchase will deffinately be the TAD WGC's

10 Jan 2005

These tubes have truly renewed my Mesa 2:90 with powerful deep bass and clear but pleasing airy top end!!!

I really recommend these tubes for who need a great professional sound.

18 Jul 2004

TAD 6L6GC-STR Blackplate

AWESOME!!!! This tube has really blown everything else out of the water!

Huge deep bass and spectacular punch. Really big soundstage! Better clarity and detail than ALL the other current production 6L6's I have used. Perhaps even better clarity than the Philips 7581A. Notes and harmonics really jumpout and everthing just sounds right. A tight and focused sounding tube for sure!

While nothing can or ever will touch the 7581A's headroom, these are VERY close! They are close enough that I don't miss the extra headroom of the Philips. These tubes are excellent quality and workmanship all- around.

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