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If you'd like, the full print review is available here -- http://www.premierguitar.com/Magazine/Issue/2011/Apr/Mack_Amps_Gem_2G_Amp_Rev...
The Burriss Dirty Red head is a little 18-watter that is fired by three Mullard reissue 12AX7 preamp tubes, an Electro-Harmonix EZ81 rectifier tube and two JJ EL84 tubes in the power section. Burriss, hot off the heels of the release of their popular Royal Bluesman, packs a lot of both qualities in their newest little monster, the 18-watt, EL84-driven Dirty Red. It's also built around a cascading preamp design that enables higher-gain sounds at lower volume, which gives it the goods to stand tall in the mini-amp crowd. On the front panel, you'll find a familiar 3-band equalization section consisting of Bass, Middle, and Treble knobs, along with separate Gain and Master volume controls. But nestled between the Middle and Treble controls, you'll find another knob called Top Cut. Burriss says the control is designed to tame the high end and warm the signal at higher gain settings. Anyone familiar with a presence control will find it works in a similar fashion. Finally, there's a Loop switch for engaging the effects loop, which can also be activated using a footswitch inserted into a rear-panel TRS 1/4" jack.
The TH30 head is a 30 watt head running on EL84 power tubes. The simple control layouts of Orange amplifiers have always been a design strength. In the case of the TH30, that philosophy remains very much intact. Each of the amp's two channels—which you can select using a front-panel toggle—is controlled by just three knobs, which means you can dial in both clean and dirty sounds with very little fuss. The Clean channel features a Volume knob and Bass and Treble EQ controls, while the Dirty channel features Gain, Volume, and Shape knobs.
The amp's overall wattage can be cut from the maximum of 30 watts to 15 watts, using the 3-way standby switch on the front panel. And if you're in the mood for some low-wattage, greasy-amp goodness, another rear-panel switch lets you knock the wattage down to a tiny seven watts by bypassing two of the four power tubes. Rounding out the modern options are a series effects loop and a jack for an optional channel footswitch.