Hi ECma7,
Here is the just received reply—I must add, an extremely quick and clear response. Great customer/technical service from Kemper. And, agreed, a firmware addition that allows for control of the Direct Output Signal strength would be nice:
"The settings of the direct out do not apply when you activate a loop stomp.
The only thing that has any influence on the send level when you place the
loop stomp before the amp section is the guitar volume and the clean
sens setting.
In other words-the signal coming out of the DI when the loop stomp is placed before any distortion is at guitar level.
Please make sure that the external device that you are using is capable of
dealing with a guitar level signal. Some rack mount devices might expect
a line level input.
In general if the external device is not
responding to the signal that is send out from the direct out when a
loop stomp is activated please try to raise the input sensitivity of the
external device.
When you place the loop in the MOD or X slot you can influence the send level with the amp/cab parameters."