The JJ EL34 II features a different construction from the classic EL34 tube, offering a different tonal palette from the original EL34. The EL34- II tube has a more compact plate structure than standard EL34’s, with an increased low to low-mid end with plenty of headroom to spare. This tube has a thick and tight bass response. The mids are balanced and harmonically rich with pleasantly smooth highs. The JJ EL34 II is stronger than the original but not harsh sounding.