Skip to content TAD Premium Selected Power Valves | 6L6GCM-STR Redbase - Matching Pair
We are open for pre-booked appointments only. To learn more about our appointment system, click the button to the right
Opening Hours
TAD Premium Selected Power Valves | 6L6GCM-STR Redbase - Matching Pair
 In Stock

Enter your name, and your friends name and email address

Stock Email
Request A One-On-One Appointment
Let us know what you would like to see, and our team will prepare everything for your one-on-one appointment at our showroom.
Preferred Appointment Time:
Products Of Interest:
* Required Field
Plek This Guitar
Please read the terms & conditions below before confirming that you wish for us to including a Plek setup on this guitar.
Choosing to have your purchased guitar Plek’d will delay the shipping. One of the team will be in contact with a rough ETA but we will endeavour to have your new guitar with you as quickly as possible. Current lead time is 2-3 weeks from the date of purchase.
If you choose to return the guitar after it’s had a Plek setup you will still be liable for the cost of the plek setup except for in cases where we’ve offered it as part of a promotion or offer.
View full terms & conditions
Tube Amp Doctor

TAD Premium Selected Power Valves | 6L6GCM-STR Redbase - Matching Pair

High Performance Audio Beam Power Pentode

The TAD 6L6GCM-STR REDBASE is a glass envelope beam pentode with a plate dissipation rating of 30 Watts with convection cooling. It is intended for audio frequency power amplification service in either pentode, ultralinear or triode connection and single ended or push-pull/parallel applications.

It is designed to be a direct replacement for any 6L6GC / 5881 or equivalent. Close manufacturing specification tolerances, gold wire grid, improved processing and final testing and QC at TAD in Germany provides enhanced reliability, superior sonic performance and grants overall consistency.

It provides electrical and audio performance very similar to that of the original Philips/Sylvania 6L6GC.

Please scroll down for further info.

 In Stock
View In Showroom
Request an appointment with one of our team
UK Next day delivery
Fast shipping with trusted couriers, get it next day!
Free UK delivery over £99
What you see is what you will get!
Paypal, Apple Pay, Google Pay, Mastercard, Maestro, Visa, Visa Electron & AMEX

This is TAD's latest 6L6GC - designed and built to be the best 6L6 type tube ever manufactured. A very high claim, but they are sure that they have achieved exactly that.

In terms of sound, it 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, it responds directly and with noticeable dynamics, from buttery soft and warm to powerful and brutal without losing any details or depth.

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

It 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 means it works for lively clean sounds as well as a powerful broadband power amplifier for multi-channel amps.

This valve is part of TAD's Redbase series, which combines the latest manufacturing technologies with traditional design and flawless quality. The TAD Redbase series is exclusively built on a TAD production line that has been optimised 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 optimises the quality of the cathode emission and opens up an exceptionally detailed sound structure.

Another advantage of this valve is that it is part of TAD's Premium Selected series. All power tubes labelled as such 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 

This pair is part of TAD's Premium Matching range, which means they have identical Plate Current (PC) and Transconductance (TC).

The Classic 6L6 Sound - Excellent Tone and Maximum Lifetime!