- Selected power tubes
- quartet (RT106)
- Sold in sets of 6 valves
New for 2021: TAD’s answer to the challenge of designing the best 6L6 tube ever made! The TAD 6L6GCM-STR REDBASE is their latest 6L6GC model, designed and built to claim to be the best 6L6 tube ever produced. An immodest ambition, but they have undoubtedly achieved their goal.
Sound-wise, the TAD 6L6GCM-STR REDBASE delivers the powerful, always precise bass characteristic of the legendary American NOS RCA 6L6GC, with clear, unobtrusive, transparent highs. In every configuration, the TAD 6L6GCM-STR REDBASE responds directly and with remarkable dynamics, from smooth, creamy warmth to extreme power and brutality, without any loss of detail or depth.
The TAD 6L6GCM-STR tube is therefore an effective upgrade for any amplifier using 6L6GC or 5881 tubes; it also replaces EL37, CV586, VT115A, 6L6GA, 6L6GB, 6L6WGB, 6L6WGC, STR-440, STR-454, 6p3p, 6p3s, 6p3s-e tubes, etc.
The TAD 6L6GCM-STR REDBASE combines the structural advantages of the robust American Philips/Sylvania 6L6GC tube (also known as MESA 6L6GC-STR415) with the sound quality of the legendary RCA 6L6GC tubes. Silky highs, deep, defined bass and plenty of headroom make the TAD 6L6GCM-STR REDBASE an ideal choice for clean, dynamic sounds, as well as a high-performance wide-bandwidth power amplifier for multi-channel amplifiers.
REDBASE™
The new TAD Redbase series combines the latest manufacturing technologies with traditional design and impeccable quality. The TAD Redbase series is made exclusively on a TAD production line optimised specially for it. At TAD in Germany, STR series tubes undergo additional burn-in and forming in preparation for TAD Premium Matching, which optimises the quality of cathode emission and reveals an exceptionally precise sound structure.
The classic 6L6 sound: excellent tone and maximum lifespan!








Daniel Duval –
Ampli correct mais un peu lourd a transporter. Le son est neanmoins tres bon.
Patrick Blanc –
Son clair et puissant, cet ampli est parfait pour les petites salles et les répétitions.
Ludovic E. –
Son puissant et clair, ampli de qualité.