DINO amps are designed for not having a boost of any kind in front of it. There's really no requirement for a booster.
In the DINO 939 there's a internal boost to switch the British channel from British Crunch/Crush to British HotRod
The Scream channel is permanently boosted
Even with the California channel when switching it from Clean to SRV mode, it's kind of having a 808 in front of the amp
