Mesa/Boogie, also known as Mesa Engineering, a company that specializes in making amplifiers for both guitars, bass, and rock in roll fanatics… Yes, for you!
The Rectifier series, which we more commonly use the term ”Recto” tube amplifiers, brought the detuned 7-string nu- and heavy-metal to fame around in the nineties. It was an instrumental success to these types of music. Three variants of the Rectifier series which exist are: Single Rectifier, Dual Rectifier and (the big dog) the Triple Rectifier series.
The Single Rectifier amplifiers are manufactured by Mesa Engineering here in the United States and are rated at 50-watts, Single Rectifiers use a silicon diode rectifier. Current Single Rectifier amplifiers that are manufactured by the Mesa company are the Rect-o-Verb 50 combo, Rect-o-Verb 50 head followed by the Single Rectifier Solo Head 50 which are all fitted neatly with a single 12″ Celestion Black Shadow speaker.
The most popular model (and my personal favorite) of the Recto series is the Dual Rectifier Solo Head. Loaded with a 
quartet set of Mesa 6L6 power tubes (switchable to EL34s –same as single and triple Rectifiers), the Dual Recto amplifier produces 100-watts of pure-tube-power. If you prefer a looser tube-sag sound, then all you have to do is simply flip the switch on the back panel to select the Vacuum Tube rectification mode from the Silicon Diode (see photo), this will engage the two 5U4-G Rectifier Tubes.
The Dual Rectifier originally had 2 channels, however, in 2001 the model was redesigned to have a third channel. Though the redesigned product had an additional channel, many people still prefer the original 2 channel amp as they claim that it produces a more superior sound over the redesigned version. With that said, some state that the cleans from the 3-channel are much more impressive.
And now for the BEAST, the Triple Rectifier has three 5U4G Rectifier and six 6L6 power tubes which produces a massive 150-watts output of power. The Triple rectifier also was originally a 2 channel version like it’s counterpart, but was redesigned to hold the third channel. And like the Dual Rectifier Solo Head, many still consider the original designed had a better sounding system. When the Triple Rectifier was designed, it held a catchy tag line From Mesa Boogie — “When excess is barely enough”. It’s safe to say this Monster’s sheer power will blow you away.
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