This is merely a trivial personal calculator for determining measures when positioning speakers that I found myself using occasionally.
There are more advanced and theory-based calculators available on the Web, check them out.
e
length of the triangle's edges (near/mid/far: 1–2/2–3/3–4 meters)
d
???
altitude: listener – speaker front
b
speaker enclosure width
b'
???
difference speaker enclosure corners – back wall
w
speaker front – back wall
d"
???
listener – back wall
s
y
speaker stand center – speaker front
e'
???
distance stand centers
d'
???
altitude: listener – stand center
w'
???
stand center – back wall
o
y
???
y-offset speaker stand center – rotated speaker front
o
x
???
x-offset speaker stand center – rotated speaker front
