Static parameter Ua--------------------------------- 1250 V —Ug-------------------------------- 200 V Ia----------------------------------- 80 mA Gm---------------------------------- 3 mA/V ri------------------------------------- 1.7 KΩ u------------------------------------- 5 RL----------------------------------- 3.4 KΩ Ug(pk)------------------------------ 69 V Pout------------------------------- 15 W Recommended Operating Conditions(reference value) class A1 .single tube： Ua----------- 1000 1000 1250 V —Ug------ -- 145 155 209 V RL----------- 6 9 16 KΩ Ia--------- --- 90 65 52 mA Gm-------- -- 3.1 — — mA/V Ug(pk)------ — 110 148 V ri------------ 1.7 1.9 2.1 KΩ Pout------- - 24 21 24 W Whenever we show Acme 845, in addition to praise, always make the audience wonder: from the day of the birth of the 845 vacuum tube, there has never been such a detailed, pure and transparent voice. The bigger the power, the worse the sound quality is, which is an insurmountable law of physics. But this time, Acme 845 completely subverted the past impression of itself: It completely retained the strength, powerful power, strong atmosphere and strong control of 845. The transformation and transition of high and low scale are also very clear and natural even with very high speed. During the interpretation of small classical works and voice, spotless, with great accuracy and purity sophistication,direct emotional expression, gorgeous and noble tone, gave the 845 vacuum tubes with unprecedented labels. And all of these are only belongs to the top audio sound qualities.
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