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T-6550A-STR-TAD6550A-STR – Tube Amp Doctor
Multiple Options Available
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.
$37.95
Starting at $34.16
You save: 10%
Out of Stock
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T-6L6GC-TAD6L6GC - Tube Amp Doctor
Multiple Options Available

Octal power tube (Max Plate Watts = 30W) TAD 6L6GC-STR RCA-Style black-plate "TAD has the remakes of the all times favorite 6L6 classics of RCA and GE. The TAD 6L6GC-STR is the perfect choice for the tone of the rock legends with powerful deep bass and clear but pleasing airy top end.


$24.75
Starting at $22.28
You save: 10%
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T-6L6WGC-TAD6L6WGC - Tube Amp Doctor
Multiple Options Available

TAD 6L6WGC-STR GE-Style small bottle black-plate"Our recommendation for single-ended Amps like Fender Champ 12, Ibanez Valbee, and others.



  • TAD has the remakes of the all time favorite 6L6 classics of RCA and GE. The TAD 6L6WGC-STR has warm lower mids and silky top end; exactly like the classic GE version of the 50s and 60s. The complex midrange and sweet heights are dedicated to excellence in a class of its own. The perfect choice for vintage amps like the Bassman, Twin or Super Reverb.

$24.75
Starting at $22.28
You save: 10%
Click to read more about this product.
T-12AY7-HG-TAD12AY7 - TAD Tubes, Highgrade
12AY7/6072A HIGHGRADE TAD Premium Selected
Tweed Up Your Amp!
Vintage tone for original vintage Fender tweed amps. The original tube for all those Fender® tweed amps from the 50s. Brings back the original sound to your tweed amp.
Q: When does a preamp tube become a Premium Selected tube?
A: All preamp tubes labeled Premium Selected have passed the following tests:
- Low Noise Test
- Microphonic Test
- Gain Test
- Sonic Tests
- Shock Tests
- Listening Tests
- Balanced Output Test
$24.50
$22.05
You save: 10%
Click to read more about this product.
T-5AR4-STR-TAD5AR4 STR - Tube Amp Doctor

Tube Amp Doctor 5AR4 Rectifier, Premium Selected A faithful reproduction of the Mullard/VALVO GZ34. Pure power and the typical sag is the distinguishing characteristic of the most popular guitar amps of the 1960s guitar heroes till today.


$23.00
$20.70
You save: 10%
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T-EL34B-TADEL34B - Tube Amp Doctor
Multiple Options Available

Octal power tube (Max Plate Watts = 25W) Sensational new high-gain (Gm) EL34 tube with very dynamic tone. Extra strong military grade construction with gold plate grid. Perfect for High-End HiFi and best choice for all Marshall®, Hiwatt®, Orange® etc. to achieve that big tone they became famous for. Very close to the legendary UK made Mullard EL34. The TAD EL34B-STR can replace any 6CA7 or KT77.


$21.00
Starting at $18.90
You save: 10%
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T-6V6GT-TAD6V6GT-STR - Tube Amp Doctor
Multiple Options Available

This all new TAD 6V6GT-STR combines the exceptionally sweet voiced NOS 6V6GT like the RCA or GE 6V6GTY with up to date demand to withstand the higher operating voltages due to raised AC supply. Surprisingly tight bass which you would not expect except with the very best choice of real NOS 6V6GT treasures. TAD recommends the TAD 6V6GT-STR for all 6V6 applications where a powerful but sweet tone is desired; Works great in Single Ended Class A Amps like the Fender -Tweed- Champ, Vibro-Champ, Fender Champion 600 or the Univalve.


$20.00
Starting at $18.00
You save: 10%
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T-7025WA-TAD7025-WA - Tube Amp Doctor, High-Grade, Premium Selected

The TAD 7025 WA delivers full gain with smooth top end. No microphonic issues even with the most sensitive preamps. The 7025 WA supports a fat midrange and creates a bold tone with lots of overtones. Played clean the TAD 7025 WA delivers a warm liquid tone which is very responsive to dynamic playing. Overdriven the 7025 WA provides lots of sustain with well defined mid-range punch.


$19.95
$17.96
You save: 10%
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T-12AY7-PS-TAD12AY7 - TAD Tubes, Premium Selected
12AY7/6072A TAD Premium Selected
Tweed Up Your Amp!
Vintage tone for original vintage Fender tweed amps. The original tube for all those Fender® tweed amps from the 50s. Brings back the original sound to your tweed amp.
Q: When does a preamp tube become a Premium Selected tube?
A: All preamp tubes labeled Premium Selected have passed the following tests:
- Low Noise Test
- Microphonic Test
- Gain Test
- Sonic Tests
- Shock Tests
- Listening Tests
- Balanced Output Test
$18.50
$16.65
You save: 10%
Click to read more about this product.
T-12BH7A-TAD12BH7A-STR - Tube Amp Doctor, Premium Selected
The all-new TAD 12BH7A-STR combines the best sonic and mechanical performance of the NOS RCA black plate with advantages of the GE version. A maximum of reliability with outstanding tonal quality makes the new balanced selected TAD 12BH7A-STR the first choice for Ampeg SVTs, the Blackstar HT-5 and high-end applications.
$17.50
$15.75
You save: 10%
Click to read more about this product.

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