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In the Forum: Horn-Loaded Speakers
In the Thread: Myth: High-efficiency Low-power
Post Subject: Re: Myth: High-efficiency Low-powerPosted by JLH on: 12/29/2005
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Do not pay any attention to the moron advice given on the Audio Asylum. The issue is not with the quantity of the power you have, it is with the quality of power you have. Genn makes some very good points. Most circuits that are accepted among the Audio Asylum are under-designed and will not stand up again a reviling system. High DCR power supplies and cathode bias are sure ways to ensure your amp is a snooze. The 300B is not a good starting point for a good amplifier. This is probably the most over rated tube in history. The deep bias required of this tube makes it an under performer in regards to upward and downward dynamic range capability. (Remember that a ever more negatively swinging grid has proportionally less and less control over plate current and looses control during peak passages.) Basically, this tube can't get out of its own way unless the circuit design is way over the top. A lot of attention must be paid to the power supply and the biasing. Even at that, it still is marginal.