Divided by 13 Thirteen RSA 31 Amp

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Page last updated Aug 10, 2025

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Refined and voiced closer to our favorite EL84 30 Watt amplifier from England, the RSA 31 offers a little more pronounced midrange and is a little more aggressive than the ERT 33, but still retains a tight, punchy lower end and has half power potential.

Channel One is laid out with Volume, Treble, "Middle", and Bass controls, giving the player the ability to move around the most important "Middle" of this type of amplifier format. And rounding it off, Channel Two remains the now familiar, gainier "Click" Channel powered by a 5879 Pentode with an adjustable frequency range and volume control.