Logitech Z506 Vs Z623 Seriously, comparing Logitech Z506 Vs Z623 is not too easy since they have different channel. Logitech Z506 is a Rich 3D stereo in 5.1 surround sound and Logitech Z623 is a THX-certified 2.1 speaker system. These two speaker systems have… admin December 18, 2014 Logitech, Sound No Comments Read more