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  1. D

    Mesa 20/20 Deep Mod

    Yes, that's right. I find that the mod works well with my preamp which is the Axe FX Ultra, which to me can be a little thin in the bass. I like the mod for cleaner type tones, such as Fender, Vox, Matchless etc. The filtered side sounds good for gain tones in standard tuning, though I can...
  2. D

    Mesa 20/20 Deep Mod

    You're misunderstanding the issue. Most people want more bass and removing the cap removes the stock high-pass that's limiting the bass. Removing that Cathode Bypass Cap also cuts the gain of V1, so adding a bigger cap brings back the gain while extending the low frequency response way lower...
  3. D

    Mesa 20/20 Deep Mod

    If you merely remove the cathode bypass cap you'll lose some gain, so it's better to replace it with something around a 22uf 16V or better cap. They're polarized so watch that when you do this, and watch out for any stored charge in the power supply filter caps (best to discharge them or have a...
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