My listening room in the garden is about 9' X 7' so I listen at about 6', room is treated with absorption panels at first reflection points on walls and ceiling and behind my sofa. As said no reflections to muddy the waters but I do need to sit back on the sofa as sitting upright on the edge of the sofa when adjusting settings the bass drops off. As for " mechanical sounds " not even with 99db drivers. I listen at 75-85db mostly and long sessions don't give fatigue.
Bakoon 13r Denon DP80 Stax UA-70 Shure Ultra 500 in a Martin Bastin body with jico stylus, project ds2 digital Rullit aero 8 field coils in tqwt speakers
Office system, DIY CSS fullrange speakers with aurum cantus G2 ribbons yulong dac Sony STR6055 receiver Jvc QL-A51 direct drive turntable, Leema sub. JVC Z4S cart is in the house
Garage system another Sony receiver, cassette deck
System components are subject to change without warning and at the discretion of the owner.