All recent Box of Doom units can be used for bass guitar (aren't sure about yours? contact us). You can change baffle and install a baffle with 10" bass speaker. To prevent the baffle from rattling, we advice to upgrade your BoD with this kit.
high quality microphone cable to connect your microphone to the third XLR connection (next to the speaker connection). With angled male XLR for easy connection and disconnection without removing the speaker.