Mesa/Boogie 12AX7 Preamp Tube

Replacement 12AX7 Preamplifier Tube, Providing High-gain Output and Balanced Tonal Response
Mesa/Boogie 12AX7 Preamp Tube image 1
Mesa/Boogie 12AX7 Preamp Tube image 1
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Mesa/Boogie 12AX7 Preamp Tube
In Stock!

Premium-grade Tube from Mesa/Boogie!

The Mesa/Boogie MESA 12AX7 is a premium-grade preamplifier tube. It's designed to provide high gain output with an overall balanced tonal quality. You'll also find that the MESA 12AX7 is both consistent and reliable in its smooth, balanced tonal response. The MESA 12AX7 is a lively, open, and expressive tube.

Mesa/Boogie MESA 12AX7 Preamplifier Tube Features:
  • Premium-grade, high-gain preamplifier tube
  • Delivers a smooth and balanced response across the tonal spectrum
  • Recognized as an extremely lively, open, and expressive tube
  • Important Notice for International Customers: Mesa/Boogie products sold by Sweetwater are intended for use within the United States. We are unable to ship any Mesa/Boogie products outside of the US.
The Mesa/Boogie MESA 12AX7 gives you smooth tube tone that's consistent and reliable!

Additional Media

Guitar Amp Buying Guide

Tech Specs

Type Preamp
Model 12AX7
Manufacturer Part Number 750150F

Customer Reviews

Based on 10 reviews
Write your review

mesa 12AX7

I did a complete tube swap replacing stock JJ tubes with Mesa 12AX7, 12AT7, and EL-84. The tone coming out of my Dark Terror now is simply amazing! Definitley worth the investment!

Pleasantly Surprised!

Purchased 3 of these tubes for my Aguilar DB751 bass amp. Compared to the Electro-harmonix 12AX7EH tubes that came in the head from the factory, the Mesa tubes give you better mid's and high's. Low end is very solid, and I could not detect any change in tone. The Mesa tubes are high gain, even more than the stock tubes. Overall, I feel the Mesa tubes are an upgrade, and I would not hesitate to buy them again.

Using in non metal amp

I bought this for my crate 80dsp, it's tubes in the preamp and solid state power section. It takes two 12au7's and one 12ax7, so it is a pretty clean amp. I'm after that tube breakup sound at lower gain and volumes and this thing delivers. With the amps gain on 3 it's ever so slightly starting to drive, turn it to 6 and it's beautiful sweet overdriven sounds, dime it and you have wonderful distortion... ALL IN THE CLEAN CHANNEL. it gets rid of a decent amount of headroom, but I have a fender if I want squeaky clean. Buy these tubes for high quality tone and breakup
Music background: Hard rock and praise bands

Great buy

I got these to replace the ones in my Marshall JCM 2000 tsl. What a difference this thing sounds amazing!!!!! If you are looking to get metal tones like Pantera metallica Megadeth or slayer this is your preamp tube!!!!! I cannot say enough good things about this tube. It's has a very tight sound. I'm in A touring metal band and everybody has commented on the sound of my amp since I put these in. If you like metal, you will love this tube!!!!!!!!!!!!!
Music background: Touring metal band

Mesa 12AX7

I like the direct swap, I tried some JJ EC803 one time, wasn't digging it, so went with these, great sound for my 5:50
Music background: Guitar Picker
See also: Replacement Tubes, Mesa/Boogie, Mesa/Boogie Miscellaneous Guitar Amp Accessories, Mesa/Boogie Guitar Amp Tubes