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Modular Amps
Egnater / Randall Modular Amps
RM20/22 - Convincing Vox/Matchless Tones?
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<blockquote data-quote="CrunchBunch" data-source="post: 151820" data-attributes="member: 3591"><p>From memory the Vox AC15 is not a true class A amp. It's some cathode-biased AB / no NFB type power section.</p><p></p><p>I haven't seen the RM20 power amp schematic, but with a good Vox module the RM20 definitely sounds Vox-ish even though the presence/density controls on the RM20 indicate that it has a negative feedback loop on the power amp. You could, however, modify the RM20 power section to have a switchable NFB (or even variable NFB).</p></blockquote><p></p>
[QUOTE="CrunchBunch, post: 151820, member: 3591"] From memory the Vox AC15 is not a true class A amp. It's some cathode-biased AB / no NFB type power section. I haven't seen the RM20 power amp schematic, but with a good Vox module the RM20 definitely sounds Vox-ish even though the presence/density controls on the RM20 indicate that it has a negative feedback loop on the power amp. You could, however, modify the RM20 power section to have a switchable NFB (or even variable NFB). [/QUOTE]
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Modular Amps
Egnater / Randall Modular Amps
RM20/22 - Convincing Vox/Matchless Tones?
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