Hello! I bought a Blackstar HT 40 combo today and i want to use it like a poweramp to my Kemper
I connect speaker output from the kemper to the amps fx return and nothing happend?? 
Is there something in the output meny i missing.
Best Regards Peter
Which KPA output are you using? Is it turned up? Is the cable good?
Does the amp have a footswitchable loop?
Have you checked the output level setting on the monitor out? You probably know this but the monitor & main output volumes can be set independently.
The FX Loop may not be enabled unless something is connected to the FX Send.
Try putting a guitar cable in the FX Send of the amp (with the other end connected to nothing). Or, you can use a 1/4" plug instead of a cable.
WAIT!
I connect speaker output from the kemper to the amps fx return
Speaker Output?? Do not connect the Speaker Output of a Powered KPA to anything but a Speaker Cabinet.
Use the Monitor Output Jack of the KPA.
Is the monitor out volume checkbox linked to main out volume?
I had an amp that required a jack plugged into the effects loop send for the return to function as you're attempting to do.
Go to the output section with pressing
the soft button. There you can find the parameter for any output. Set the output of the main to master stereo and the the monitor out. Above those paramers you can see checkboxes were you can link
the output of main out, monitor out, headphone out to the main output knob of the kpa.
Check out that these boxes are active. To set them active press the soft button above these checkboxes.
BTW: where do you come from?
Elzejupp, Done that, but the resaults is the same:-( everything is linked in the output section and they are active
Frustrated now!!! i have my kemper with headphones and a pair yamaha speakers (not satisfied) so i sold my speakers and get a amp because
have this solution with a axe effect and i like it (more amp feeling.
Thank you for trying to help me
Peter
Have you checked the dbv switch on the back of the amp? + 4 db and - 10 db.
Try it with the + 4 db
Could you check if the fx loop is working with a normal effectpedal?
Put an empty jack in front guitar input and than use the fx return ( kpa monitor out to fx return of the amp) and it works as Hell-G has written.
You read it in the blackstar forum, search for "using blackstar ht 40 as a poweramp".
Yes,yes,yes!!! i I tried this and now it works
Thank you so much guys I am very grateful
Peter 
Yes,yes,yes!!! i I tried this and now it works
Thank you so much guys I am very grateful
Peter
Tricky little amp you got
Tricky little amp you got
Goodness, what a hassle. Glad it works now. I used my Soldano's FX without any problems from day one.
