1. Same DI, just as good ๐
2. On the WB-100? Just like any other tube head, so :
Set it to standby
Power it up
Wait a minute or so
If you're ready to play, switch it out of standby, wait for the logo to change to green, and off you go
When you're not using it, switch it back to standby
When you're ready to pack up, switch it to standby, wait for the logo to switch to red, and power it down
All this is basically to preserve tube life.