6550A-STR TAD Premium Matched

Variants Description Stock Price Quantity
RT881 single (1 selected tube) on_Stock € 49,90
RT882 Pair (2 gematched tubes) on_Stock € 99,80
RT884 Quartet (4 matched tubes) on_Stock € 199,60
RT886 Sextet (6 gematchte Röhren) on_Stock € 299,40
RT888 Octet (8 matched tubes) on_Stock € 399,20

(incl. Tax excl. shipping)

6550A-STR TAD Premium Matched

Remake of the Classical GE6550A - TAD 6550A-STR PREMIUM Selected

NEW VERSION: Since Sept. 2010, the TAD 6550A-STR has been manufactured with a stronger and exceptionally pure anode material combination. In conjunction with the extended TAD burn-in and formating process, the 6550A-STR reaches an outstanding consistency and stability and outperformes even the 6550C -C-.
This makes the 6550A-STR withstand even the most critical application like e.g. the Ampeg SVT.
(Fits only without the tube retainer!)

The TAD 6550A-STR is a true remake of the vintage GE 6550A with a heavy, straight glass envelope, polished metal base and the authentic triple getter construction. A balanced tube, known for its incredible bottom end and rich mids. Smooth, liquid bass, natural sounding tone and a wide open character make this tube extremely popular for bass guitar amps and High End Hi-Fi applications.
The ratings of the TAD 6550C-STR meet or exceed those of the classic 6550A tubes. It performs superbly in any application asking for 6550.

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.

RohS Compliant
Show 1 to 3 (in total 3products)

korob (5/5)

very good

korobkov nikolay (5/5)

очень понравились

Chris Turner (5/5)

TAD recommended this 6550A-STR for the AMPEG SVTs. My SVT was "eating" 6550WEs within a few months. The TAD 6550A does work now since over a year with great power and delivers the best tone I ever achieved from my SVT.

Thanks to TAD for that excellent 6550A-STR and the great support finding the right tubes.
Show 1 to 3 (in total 3products)

Your review

Your name:

Don't use HTML code!


bad good


Please enter the verification code:

more matching products and alternatives:


Spring Tube Retainer for 6550/KT88, nickel finish, with silicon dampener
You can object to the anonymous data collection entirely.

Dear customers,
because of email maintenance, we currently can neither receive nor send any emails. This, however, does not affect your online orders. If urgent, please give us a ring.

Your Tube Amp Doctor Team