More distant instruments produce a greater amount of reverberation in proportion to direct sound than closer ones, thereby giving the illusion of depth. Near sound sources propagate spherical wavefronts whereas distant ones have a nearly plane front. So for the same angle of incidence there is a greater phase difference across a stereo microphone pair for a near than a far sound. This adds to the effect of depth.
"I want to thank you for another successful transfer. This is the second order you have done for me, (this time you did 2) and all the results have been excellent. My wife was with a group called the “Womenfolk” in the 60’s and they had five or six albums. I’ve been able to find them all on Ebay and with your transfers our whole family ..."