Marvin Posted August 28, 2018 Posted August 28, 2018 (edited) Ashdown FS-4 footswitch. Controls the 'Valve' , 'Compression', 'EQ' and 'Sub Octave' functions on compatible Ashdown amps. NEW PRICE £25 inc postage. Here's a picture. Edited October 10, 2018 by Marvin
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