The XXX variant is worth the premium if you run active 3-way front speakers + subwoofers + rear fill. For simple sub + coaxial setups, the Lite is adequate. We aggregated feedback from 50+ verified buyers on car audio forums and Amazon:
A: Absolutely. The Toslink input accepts PCM up to 192kHz/24-bit. xmod pro xxx
A: Idle: 200mA. Max processing: 1.2A @ 14.4V. No external cooling needed. The XXX variant is worth the premium if
A: Yes, via the digital loop-out (coaxial). Sync them using word clock through the expansion port. xmod pro xxx