Tube Fender Groove Tubes 12AX7

The TAD 12AX7A-C / ECC83 TAD Premium Selected provides very good gain, tight deep bass, fat mids and silky top end with overall definition and brightness.

Selected with balanced systems and recommended for guitar amps to improve overall response.

Best for clean tones as well as for sounds requiring deep-bass power like any modern preamp.

Recommended for all positions in amps with medium gain level or High-Gain Amps for V2+ positions.

As for V1 in general, but especially for higher gain amps or phono/audio-amps, we recommend the RT010 7025 Highgrade, the RT030 E83CC/7025 Highgrade or RT093-HG 7025-WB Highgrade

The TAD 12AX7A-C can replace any 7025, 12AX7WA, 12AX7WB, 12AX7LPS, 12AX7EH, ECC83 or E83CC.

1st choice for:

Blackstar®, Boogie®, Diezel®, Engl®, Fender®, Hughes & Kettner®, Koch®, Laney®, Marshall®, REVV®, Soldano®, Two Rock®, VOX® and so many more.

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

We call the tubes SELECTED which have passed above tests and thus qualify as reliable all-round tubes of their type.Typically this is around 30-60% from a batch that receives the SELECTED label from TAD.

For applications in particularly sensitive functions such as V1 or input stage with combo amps, V1 in high-gain amps, tube microphones and phono preamps, we recommend using the respective HIGHGRADE selection

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.

The TAD 6L6GCM-STR REDBASE is a latest 6L6GC designed and built  to claim to be the best 6L6 type tube ever manufactured.

A damn high claim, but we are sure that we have achieved exactly that.

In terms of sound, the TAD 6L6GCM-STR REDBASE produces the powerful but always defined bass response known from the legendary american built NOS RCA 6L6GC, with clear, unobtrusive and yet transparent highs. In every setting, the TAD 6L6GCM-STR REDBASE responds directly and with noticeable dynamics, from buttery soft and warm to powerful and brutal without losing any details or depth.

This makes the TAD 6L6GCM-STR an effective upgrade for every amplifier using 6L6GC or 5881 tubes; also repalces any EL37, CV586, VT115A, 6L6GA, 6L6GB, 6L6WGB, 6L6WGC, STR-440, STR-454, 6p3p, 6p3s, 6p3s-e etc.

The TAD 6L6GCM-STR REDBASE combines the structural advantages of the robust American Philips / Sylvania 6L6GC, also known as MESA 6L6GC-STR415, and the sound quality of the legendary RCA 6L6GC tubes.

Silky highs, defined, deep bass and lots of headroom recommend the TAD 6L6GCM-STR REDBASE for lively clean sounds as well as a powerful broadband power amplifier for multi-channel amps.

The new TAD Redbase series combines the latest manufacturing technologies with traditional design and flawless quality. The TAD Redbase series is exclusivly built on a TAD production line that has been optimized especially for the TAD Redbase series. At TAD in Germany, the tubes of the STR series receive a special, additional burn-in treatment and formatting process in preparation for the TAD Premium-Matching, which optimizes the quality of the cathode emission and opens up an exceptionally detailed sound structure.

-      Plate Current (PC) and Amplification (TC)

-      Low Noise Test

-      Microphonic Test

-      Sonic Tests

-      Shock Tests

-      Listening Tests

-      Shorts & Leakage Tests

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

We call the tubes SELECTED which have passed above tests and thus qualify as reliable all-round tubes of their type.Typically this is around 30-60% from a batch that receives the SELECTED label from TAD.

For applications in particularly sensitive functions such as V1 or input stage with combo amps, V1 in high-gain amps, tube microphones and phono preamps, we recommend using the respective HIGHGRADE selection

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.