How do you test speakers when debugging your chain?

[lamir35]

Ok, so now how can you be sure that there is nothing clipping within your software? Stand alone application are unreliable about level indication ( each developper have his own view of what an indicator should be ( most of the time a Christmas tree making a lot of light and colors...as human being are visual by nature they like blinking things) and how to implement it.

Well someone suggested saving the output to a wav file and using an audio editor which looks at the graph for clipping warning. There's no clipping.

I used exactly the same way to produce the sound when playing the midi file , only difference being me sitting in a different position.
I already eliminated the problem to the power amp + speakers section, since it doesn't happen in headphones. If you see a way it could still be a fault unrelated, sure, I'll go over the chain (I see no reason to use a drawing for a series):
keyboards midi output ->
mid-usb adapter ->
OS: win10,
host-synth: pianoteq/garritan,
audio interface: Focusrite Solo
driver: ASIO
audio interface headphones output/line out->
rca x2 cable ->
power amp ->
Finalists

Hope this sorts it out.