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Modular Amps
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Preamp stage biasing
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<blockquote data-quote="nomad100" data-source="post: 88564" data-attributes="member: 1490"><p>What do you guys know about preamp stage biasing, hot and cold?</p><p>All examples below are with a 100K plate load.</p><p></p><p>1.5K is pretty neutral and will give you the most head room on that stage.</p><p>A higher resistance give your a colder harsher clipping distortion</p><p>a lower Resistance gives you a warmer Softer clipping more compressed distortion.</p><p></p><p>Soldano's and Early Recto's 1.8K, 1.8K 39K 1.8K</p><p></p><p>A JCM800 2.7K, 10K, 470Ω 820Ω in their preamp.</p><p></p><p>I believe bias has a lot to do with the texture of the distortion and feel.</p></blockquote><p></p>
[QUOTE="nomad100, post: 88564, member: 1490"] What do you guys know about preamp stage biasing, hot and cold? All examples below are with a 100K plate load. 1.5K is pretty neutral and will give you the most head room on that stage. A higher resistance give your a colder harsher clipping distortion a lower Resistance gives you a warmer Softer clipping more compressed distortion. Soldano's and Early Recto's 1.8K, 1.8K 39K 1.8K A JCM800 2.7K, 10K, 470Ω 820Ω in their preamp. I believe bias has a lot to do with the texture of the distortion and feel. [/QUOTE]
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Modular Amps
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Preamp stage biasing
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