Achieve Early Saturation with Low-headroom EL844s No, that's not an extra four — JJ's EL844 power tubes are a variation of the tried-and-true EL84, engineered with a 25% reduction in headroom. Because of their reduced power, EL844s break up at significantly lower volumes than the standard EL84, effectively lowering the “sweet spot” of saturation so coveted by countless guitarists. Thus, EL844s are a standard-issue upgrade for Sweetwater's volume-conscious EL84 amplifier fanatics — cranking a full-bore tube amp into power tube distortion is a luxury that precious few of us have! All in all, the EL844 is an excellent option for studio sessions, bedroom use, or any other application where legendary EL84 breakup is required at a more reasonable volume.Apex Tube Matching: the industry's gold standard for tube matching Apex Tube Matching is an intensive, multi-step procedure that's engineered to deliver the most accurately matched tubes possible. Typically, industry-standard tube matching