boogietone
Well-known member
Either buy Mesa tubes with matching color codes or go to a tube vendor like Dougstubes and tell him what you've got and Doug will hook you up. You can also just order online at their website and on the drop down window pick average distortion and matched duet or match quad. On Dougs website it is explained that his tubes are graded like Groove Tubes. Groove Tubes range for Mesa is 4-7. Which is the average distortion on Dougs tubes. You can look here for the details http://www.dougstubes.com/faq.html if you scroll down to the question "How does your ratings system work?" Also remember, if your amp is still under warranty, using any tubes other than Mesa tubes can void the warranty.
Hope this helps!
Hope this helps!