Volume of my devices in overbridge, ableton – Overbridge

This is normal. You could use a Utility, but I’d probably go with either a Limiter or even a gentle Compressor, either on each track individually, or on a group containing all of them. (The Limiter/Compressor approach will stop you clipping no matter how much you bump the gain).

It also reveals what’s going on internally in the hardware: the gain of each channel is actually relatively low, but there’s a lot of headroom. This is why when you have lots of delay feeding back, overdrive, etc, it’s still very hard to get a channel to clip: because there’s loads of headroom above its level. At the end of the internal signal chain, there’s a compressor bringing everything up to a nice loud volume (and gluing it together a bit – I may be wrong but I’m pretty sure there’s a small amount of compression going on).

When each channel is run individually into Overbridge, that final gain-stage is missing, so you get channels at their internal levels.