The fan unfortunately is not temperature sensitive and wails away upon power up! I am sure saving weight is a big deal when you try to squeeze every dollar out of shipping costs.
4-pin PWM fans and a controller for them are nothing to be marveled by anymore..
Since the unit already has a fan, we won't consider that in the notion of "saving on shipping costs" for "weight savings". All that's left is the controller.
Here's one from Noctua, at 1.76 ounces and dimension size of 1.89 x 0.83 x 0.98 inches, I highly doubt Behringer is saving much on skimping out on a feature like this if they were adamant about not having temp-probes anywhere in this system sending signal to the fans.. At least let us choose the fan speed, if it's too low and the unit shuts off due to protection circuits or some thermal limit, then we know we'd have to up the fan speed (or have "recommended" portion on the dial itself from Behringer).
There's no reason fans need to be screaming at full load. This is simply archaic. No excuse tbh. Could've at least included a Noctua fan instead of whatever they went with, if they truly wanted to leave fan profiles static and out of the hands of consumers, or logic controlled.
Great review bossman