7025 HIGHGRADE TAD Premium Selected

Variants Description Stock Price Quantity
RT010 7025 HIGHGRADE TAD Premium Selected on_Stock € 29,50
RT010 (2)
7025 HIGHGRADE TAD Premium Selected (2x)
+ Matching in PAIRS for TAD-Preamp Tubes (balance selecting included), cost per PAIR
on_Stock € 66,20

7025 HIGHGRADE TAD Premium Selected

Warm, clean tone with creamy overdrive!

PREMIUM selected quality for the most demanding amp stages. This tube works greatly for warm clean tones and creamy overdrive. We recommend this tube for the 1st gain stage and as input tube. It upgrades 12AX7A and ECC83 tubes and replaces E83CC tubes.

The HIGHGRADE Selection is the tip-of-the-top quality at the lowest noise (microphony, hum, hiss) level. Tipically only 0,5-2% out of the whole production of this tube meet the HIGHGRADE requirements.
NOTE: due to extreme demanding TAD-Selection criteria, the availability of this tube is limited. Please check the information about availability.

The TAD 7025 Highgrade can replace any ECC83, E83CC, 12AX7, 12AX7A, 12AX7M, 12AX7WA/WB/WC/LPS/EH, 5751 or 7025.

In case this tube is currently not available, we recommend as replacement tube: RT080

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

But only those tubes which pass these tests best are labeled Highgrades.

Matching and Selecting Options for Preamp Tubes
Matching in Pairs for preamp tubes means that two tubes show identical gain, hence, four characteristically identical systems.
This matching method includes our Balance-Selection. We highly recommend this matching method for hi-fi systems.

TAD Premium Selected/Highgrade 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 5 (in total 8products)
1 2

Eric MILLOT (5/5)

The Phono preamplifier I made there is about ten years already, is based on the Marantz Model 7 scheme. Three 12AX7 tubes are used, two "V1" for Right & Left, and "V2" in Cathode Follower. In order to optimize this well-known installation, I chose Mcap / Mundorf / Audyn Cap and Stiroflex capacitors.
More complicated, was to make the right choice, and find the right tubes to complete this Preamp.
After an email exchange with Stefan and Andreas, proposing the 7025 HIGHRADE TAD (RT010), I make the choice for this Tube in "V1" while keeping my JAN Philips 12AX7WA in "V2" (my favorite in this position ... ...).
Once again, the Tube Amp Doctor team was convinced and very well oriented.
Since these tubes are in use on my Phono Preamp, I left out my CDs.

mattia miglioli (5/5)

I put this fabulous tube in my v1 princeton reverb!! AAMAZING sound, sweet, warm, high definite notes, improve sound quality and sustain, if you wanna somethin that make your amp sound like a true amp in order to get the guitar sound itself buy this tube!congratulations TAD.

Robin (5/5)

Slightly cleaner than the Philips 12AX7 it replaced in my Silverface Champ (1973). It has more punch and clarity, and the drive is more detailed. No more microphonic issues.

It is still running in, but is getting better every hour!


Absolutelly a must if your V1 goes microphonic, specially in small combos but, sonically, it sounds to me a bit sterile, too much refinated.

Alex Milella (5/5)

My Mesa Triaxis needs 5 tubes, and the first two (1st gain stage) now I use TAD 7025 HIGHGRADE Premium Selected giving to my Triaxis warm clean tones and creamy overdrive!!!
I really recommend these tubes for who need a great professional sound.
Show 1 to 5 (in total 8products)
1 2

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