Does the Presonus 1U 'Studio Channel' actually have a tube in it, or is this some kind of modelling circuitry? All the information appears to suggest it actually has a real tube preamp. I am wondering if this is the case, then:
1) How hot does the unit get and is it suitable in a compact 3 x 1U cabinet which already has a Quantum in it without getting too hot? The two units would be separated by 1U of space with a blanking panel.
2) Is the tube replaceable if it pops (is the cover removable)?