Click on the Links below to buy matched sets of replacement guitar amplifier valves. These high quality guitar amplifier valves are manufactured by all the major valve brands and can be used in a wide range of guitar amplifiers.
Matched Amplifier Valves Explained
Most Valve Guitar Amplifiers, especially push-pull designs, require matched output tubes. These can be in a matched pair (x 2), matched quad (x 4) or matched sextet (x 6) depending on the guitar amplifier design and the output of the amplifier. The general rule being more valves more power. In a push-pull guitar amplifier design one valve is pushing the speaker cone and one is pulling it. As the sound generated by the speaker is reliant on a clean signal it is important that the valves push and pull in equal measure.
Matched Sets of 12AX7 ECC83 Amplifier Tubes
- 12AX7 Matched Pair (2 x Tubes)
- 12AX7 Matched Triplet (3 x Tubes)
- 12AX7 Matched Quad (4 x Tubes)
- 12AX7 Matched Quintet (5 x Tubes)
- 12AX7 Matched Sextet (6 x Tubes)
Matched Sets of EL34 6CA7 Amplifier Tubes
Matched Sets of EL84 6BQ5 Amplifier Tubes
Matched Sets of 6L6-GC Amplifier Tubes
Matched Sets of 5881 Amplifier Tubes
Matched Sets of KT77 Amplifier Tubes
Matched Sets of 6550 Amplifier Tubes
- 6550 Matched Pair Power Valves (2 x Tubes)
- 6550 Matched Quad Power Valves (4 x Tubes)
- 6550 Matched Sextet Power Valves (6 x Tubes)
Why Use Matched Amplifier Valves?
It can be a false economy buying single valves and inserting them into the existing circuit. If unmatched valves are used in the amplifier it is highly likely that the output sound will be degraded but most likely using the amplifier like this will lead to expensive damage to other parts of the circuit. When the amplifier is idle, both valves will draw a small amount of current. If both valves are matched and drawing the same current, and have the same amount of gain, they will do a good job of cancelling any mains hum and other noise inside the amplifier circuit. If the are not balanced (or matched) more hum will be present in the speaker. Also, it is likely that there will be a mismatch in the current draw, resulting in one valve getting hotter than the other valves in the amplifier. This may be severe enough to cause the valve to glow red which will reduce the life of the valve and overall reliability.
Buying matched valves will ensure the valves have been individually tested for the same bias current under identical conditions of plate voltage and grid bias voltage. If you are unsure about changing your guitar amp valve read our Guide to Replacing Guitar Amplifier Valves.
More Amplifier Valve Links
- Buy a Single Guitar Amplifier Valve
- Buy a single guitar amplifier valve for replacing faulty tubes. Check your amplifier manufacturers instructions as some amplifiers need matched sets.
- Matched Sets of Guitar Amplifier Valve
- Matched sets of pre-amplifier and power output valves to ensure the maximum performance from your amplifier. Click on the links above.
- Full Guitar Amplifier Re-Valve Kits
- The best way to get the best from you guitar amplifier. By changing all of the valves as a complete set maximum performance from the amplifier can be assured. Changing individual valves can be a false economy as the one weak link in the chain will affect the overall performance.
- Look Up Your Guitar Amplifier
- We have kits available for most guitar amplifiers. Use the link above or the SEARCH feature to look up your amplifier
Guitar Amplifier Tube Replacement
We have included some guidance on selecting the best new tubes for your guitar valve amplifier. Changing the valves periodically can have a massive effect on the quality of the sound generated by the guitar amplifier and also reduce hum. Read our guide to Amplifier Tube Maintenance and Care
Once you have changed the valves in your amplifier make a note of the date. This can be by adding a sticker to the back of the amplifier. This will allow you to decide when is best to change them in the future. Amplifier valves (or tubes) will operate under normal conditions for up to 1000 hours. After this they will start to degrade.
Guitar Valve Amplifier Technology Explained
We have written a number of pages to explain the guitar valve amplifier technology and some of the work that is behind valve guitar amplifier design, components used in the manufacturing process and how to care and maintain your valve amplifier in top condition. Our articles explains guitar valve amplifier technology starts with some basic explanations of the different types of guitar amplifier.
Valve Amplifier Circuits.
Within our guitar valve amplifier technical guides we have included some circuit diagrams of classic tube amplifier designs from the 50’s and 60’s. An example is shown of the Fender 5C3 circuit as used in the Fender Deluxe Valve Amplifier.
- Valve Amplifier Single Output Stage
- Valve Amplifier Push Pull Output Stage
- Guitar Amplifier Tubes Explained
- Guitar Valve Amplifier – Output Tubes Explained
- Guitar Valve Amplifier – Preamp Tubes Explained
- Guitar Amplifier Pre-Amplifier Valves Compared