Dear @dman777 : I agree in almost al@mapman @hilde45 already posted but for different reasons.
" Musical " is a wrong word used for years as an adjective for any audio item in a room/system and not only amps.
Why " wrong "? first because in reality says aolmost nothing about the audio item other that it's what the owner likes: his " taste " and each audiophile has different tastes. Yes 100% subjective.
In audio " musical " is not true/reral related to distortion levels, feedback, soundstage, odd harmonics and the like of the audio items.
Electronics today in the audio world are way different to the 60's designs specialy the SS units ( of course that gentlemans like atmasph still lives in the 60's. Today Is a myth that he likes to spread from several years now. Never mind. ) where iover the years its active and passive parts way improved order of magnitudes and yes designers improved too.
The gentlemans that as me attend at least one time each week to listen live MUSIC never talk ( example ) that the concert with the Firebird score was " musical " or smoother, or about the " nuances " or the venue etc etc.
Live MUSIC seated at near field is not smoot but even could be very agressive witgh brigthness or even harsness and all those is not about odd harmonics or clipping ( as with in the past electronics. Today designs comes with wide overload margin high headroom ) Any one of us can pprove what I'm telling here doing something simple: seat in a piano instrument ( top cover opened. ) and even with out be a piano player hit with your rigth hand 4-5 different notes and you will know what I'm talking about, no way to say " smooth ": it does not exist seated at near field.
MUSIC has his natural brithness as its natural colors. Yes, if we are seated in the 20+ row things are different but things are that the recording microphones are not seated at the 30 row but at truly Near Field ". So from where comes in our system that " smoot " " nuances " " the venue ": it's what we want to " think " or bad audio item designs or bad pressings.
Soundstage is an audio word with almost no meaning because the sounstage is developed between the speakers and room not in the recording. same systems in different room develops different soundstage.
We audiophiles " invented " several words that are non adequated and were invented due to each one of us ignorance levels.
I never in my audio life or MUSIC life talk of " musical ".
Subjectivity several times plays a role against each one of us because each one of us as human beens has way difference Tolerance levels to distortions: THD/IMD or SP or frequency deviations. Btw, discussions in the VIV tonearm and Dava cartridge ( analog forum ) threads confirm exactkly what I posted here.
Not for me but for the ones that like the word " musical " it's only taste and a word thatb even that is meaningless is a way trying to explain what each one of knowledge levels does not permit saying in precise way.
Such is life.
Regards and enjoy the MUSIC NOT DISTORTIONS,
R.