One of my old "bricks" at work ... interesting is the size ratio compared to the RasPi A+ with the AMP2 
@Mr.R0b0t The speaker cables are cross-connected. As a result, the (+) and (-) poles are closer to each other (4x instead of 1x). This reduces the inductance (magnetic field) and thus improves the pulse reproduction.
Normal:
(+)(-)
Cross-connected:
(+)(-)
(-)(+)
You can try it out if you like.
Best regards
Norbert
@Mr.R0b0t The speaker cables are cross-connected. As a result, the (+) and (-) poles are closer to each other (4x instead of 1x). This reduces the inductance (magnetic field) and thus improves the pulse reproduction.
Normal:
(+)(-)
Cross-connected:
(+)(-)
(-)(+)
You can try it out if you like.
Best regards
Norbert
