LM3886 composite power amplifier with ultra-low distortion.I recommend strongly not to order this version (see below v1.1)!Known issues:1) the series protection diode arrays of the voltage regulators must be soldered upside-downUPDATE:- I had the very first listening test.... and I say: the amp is really very good! Absolute no noise, fine details, dinamic...;)- The DC-servo is functioning good.- For feedback and compensating capacitors do not use cheap and/or noname ceramic, they sound awful. So called "FKP" caps sound dull. My best choice is polystyrene. The new 1.1 version is coming and available soon (winter 2020-21)from szb.audio@gmail.com!Please ask for PSU and SoftStart modules too!Following main changes are adapted:Optimized component patterns:- bigger pads for easier soldering and better hold- possibility for 0805 sized smds (res. and cap)- possibility for tht (foli) resistors in the feedback pathOptimized layout:- added and deleted of components accordingly to the new schematic- changed some component placement- changed some signal and power traces - adapted silkscreen- possibility for upside-down pcb arrangement (for optimal power supply wiring)Fixed errors:- protection diodes reversedAdapted documentation (Schematic, BoM, ect.)
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