Motu 2408 Mk2 Manual ((new)) Link

Because the 2408mkII relies on a PCI card, using it with modern computers often requires a PCIe-424 card to fit into modern motherboards. Users should also be aware that the internal power supply can run hot; ensuring proper rack ventilation is the most common advice for extending the life of the unit.

The manual walks you through:

A common question from new users is: “Why does my 2408 mk2 have a 9-pin D-sub cable instead of USB/Firewire?” The manual explains the Audio Wire system. This is not a standard serial cable; it is a proprietary 48-channel bidirectional link. The manual provides: motu 2408 mk2 manual

is designed to connect to a computer via a dedicated (originally the PCI-324, later the PCI-424) using a proprietary "Audiowire" cable that resembles a standard FireWire cable but uses a different protocol. Configuring Input Levels (+4dB vs -10dB) Because the 2408mkII relies on a PCI card,