Hi again Alain.
If you use cable from the line output on the VA and connect it to the
"aux in" at the back of your KN, you'll sendt the sound to the same
channel as you already use in your amp.
And yes, you'll hear the sound in the amps speakers as well.
I'll try to explain in a simle way:
A mixer is a "box" with many inputs/lines, and you can adjust several
functions such as volumes,balance before you send all the sound to the
amp with i.e. only one left and one right cable, or a single mono.
Mixers you can buy in all kind of sizes/channels and prices.
You can also send i.e. mic. sound to external DSP and return signal
with effects as echo and plate etc.
Myself I use a Behringer MX1604A and it works just great, but I could
probably managed well with a MX802A for homeuse.
Behringer is also low priced regarding to high quality and value you got
for your money.
GJ
BTW,
very often you'll see that modelnumbers tell you something about the
capasity of the product, i.e:
MX 1604 = 16 channels mixed down to 2 or 4 outputs.
MX 802 = 8 channels mixed down to 2
_________________________
Cheers 🥂
GJ
_______________________________________________
"Success is not counted by how high you have climbed
but by how many you brought with you." (Wil Rose)