The guy who owned and ran the studio I used in the 80s and 90s for voice-overs for corporate multi-image slide presentations (remember those?), tracked the voice-over talent on a pair of Minimus-7s. They were just all-around killer little speakers.
And Lee - NS-10s, as Miles has alluded, are used to check the mix just before taking a cassette of the mix out to play on the car cassette deck with the in-dash speaker to see if the mix works in the worst possible scenario... Not unlike how Avantone cubes are used in a studio. Side note, I just checked Vintage King's pro audio website to double check the Avantone name (as Auratone makes a similar cube now) and Avantone is selling a pair of NS-10 knockoffs (CLA-10s) for $700 per pair.
https://vintageking.com/avantone-cla-10-passive-studio-monitors-pair