Added a speaker out/in to my 100 combo. : r/BossKatana
Speaker out Mod for the Boss Katana 100w 112! - YouTube
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Make the Katana Air Gigworthy with this $3 mod. Wow, it is LOUD! - YouTube
HELP NEEDED: headphone output is extremely distorted on boss katana mkII 100w. What adaptor/headphones do I need? Any help is greatly appreciated!! : r/BossKatana
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Boss Katana Artist MkII 1x12" 100 Watt Guitar Combo Amplifier – Specialty Traders