I recall that i have recieved quite some time this small raspi-amp-dsp-2 channels, it could be a good start 
I'm currently designing the cabinet with parametric values with a web based design software in order to resize it to the appropriate volume for the Alpair.
I'll keep you posted mostly after Christmas
I'm currently designing the cabinet with parametric values with a web based design software in order to resize it to the appropriate volume for the Alpair.
I'll keep you posted mostly after Christmas