The MESA 12AT7 is a premium grade, classic low gain preamp tube most often used as a reverb driver and/or phase inverter in older amplifiers - It is used as a reverb driver in older MESA/Boogie designs, such as the Studio Preamp and some Mark Series amplifiers.$17.00
MESA 12AX7's are premium grade preamp tubes that provide the maximum level of high gain output and overall tonal quality with unsurpassed consistency and reliability - They possess a smooth and balanced response across the tonal spectrum and are extremely lively, open and expressive.
MESA SPAX7 preamp tubes are a super-premium grade substitute for any 12AX7 positions - They are a "Special Requirement Preamp Tube" that possess an even higher standard of overall performance, due to their incredibly low sensitivity to microphonic noise - This is the ultimate preamp tube to use in all critical gain stage positions - It is the absolute best of the best!
The MESA 5Y3 is a true, authentic 5Y3 NOS (New Old Stock) equivalent modeled after the original Phillips 5Y3 and is built to Mesa's exacting specification for use in their Lone Star Special - This tube produces a sultry vintage sag, creating a silky, smooth feel on the strings and provides the most sag of all of their rectifier tubes.$21.00
3 3/4" from bottom of base to top of glass.
The MESA 5U4GB rectifier tube is Mesa's very best overall 5U4 and their tube of choice in the production of all new Mesa amps featuring this tube - Based upon classic 1950's technology, the 5U4GB is a vastly improved 5U4 design that is extremely reliable and consistent, as well as much more compact - It is basically the size of a 6L6 power tube, so please take special care to install them in the correct tube position(s), especially when replacing 6L6's at the same time - This tube produces a "traditional vintage sag" with the most elastic and compressed feel of the two 5U4's that they offer - Amazing feel and exceptional overall quality make this the factory favorite$25.00
The MESA EL-84 / 6BQ5 is the little brother to the EL-34 and is the classic European designed tube that lead the British invasion - Mesa's EL-84 is tight and aggressive, yet smooth and warm, with an amazing chiming mid and top end - Brilliant focus with a frequency response that always brings your guitar to the front of the mix - This tube is true to its classic roots and is extremely consistent and reliable.$25.00
The MESA 5AR4 rectifier tube produces a vintage feel with light to mild "sag" - While it produces more "sag" than Silicon Diodes, it is the least "saggy" of Mesa's tube rectifier offerings (The Rectifier is part of the Power Supply and its purpose is to convert AC into DC)$25.00
Duet (matched pair)
The MESA 6V6 STR-417 is the little brother to the 6L6 and is all about classic American tube tone from yesteryear - Extremely sweet and bubbly with a beautifully deep bass and spacious shimmering highs, this tube defines vintage "Deluxe" styled tone and is a great substitute in the Mark I, Mark IV & Lone Star when used with their "Tweed" Switch feature - Please see the amplifier owner's manual for correct use of this tube.