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DIY preamplifier with 3 band EQ save a good amplifier from being disposal!

DIY preamplifier with 3 band EQ save a good amplifier from being disposal! DIY preamplifier with 3 band EQ save a good amplifier from being disposal! Or how to use electronics skills to save money! Lots of good electronics still good around us can be revive for a new purpose with very simple tweaks and a lot of passion.

DIY preamplifier tone controll 3 band EQ TDA7294 bridge power amplifier,

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