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If you decide you like it, but you want to retain the option, you should consider a negative feedback switch. If you don’t, simply re-solder the green wire to the external speaker socket and skip to the next mod.
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Have a listen and see if you like the tone without negative feedback. Start by de-soldering the green wire from the positive terminal of the external speaker jack and covering the exposed wire with some insulation tape to prevent it from shorting out. Removing or modifying the negative feedback is one of the easiest mods you can make to an amplifier, and the best thing is that it generally costs nothing and is easily reversed. We used a matching feedback control knob using existing and unwanted holes is easier than drilling new ones
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