Mesa Boogie Dual Rectifier

The Dual Rectifier Solo Head was the most popular model of the Rectifier series. The name comes from the use of 2 rectifier tubes, which are switchable between silicon diodes. Equipped with a quartet of 6L6 power tubes, the Dual Rectifier will produce 70-100 watts, depending on options chosen. For a looser sound, Dual Rectifier amplifiers allow users to utilize tube rectification rather than the common silicon diode rectification at the flip of a switch. Like in the Single Rectifier series, a bias select switch is standard. The Dual and Triple Rectifier amplifiers, which also feature 5 12AX7 pre-amp tubes, were originally designed with 2 channels (though not true parallel channel circuits), but recently were redesigned to incorporate a third channel. However, many people consider the older 2 channel models to have a superior sound. These Pre-500 rectifiers are said to have superior tone due to specific transformers that were only used on these early models. In addition these first 500 also feature a unique circuit board that was changed toward the end of 1992. One can distinguish the Pre-500 dual rectifiers by their serial number found on the back of the amp and should fall between # R-0001 to R-0506.