davidsrsb
pfm Member
Back then KEF did have the equipment and actually did a (hard to find) tallish custom stand for the Celeste. What was missing was an awareness in the press that speakers work with the room and height is important. To this day anechoic chamber tests are used as the main judge.Certainly in the case on Mission in the 1970s they were a 2 man band. It will have likely been some rough calculations and listening trial and error.
Today you can fire up a laptop and sound card achieving results in minutes that would have taken weeks if not months back in the day.
I replaced the KEFs with the original 752s and really liked them until I got a much bigger room that they were too small for.