If a speaker is punchy, it is not neutral
and vice versa.
My speakers are most certainly both punchy and neutral - and I wouldn't want to be without both qualities.
'Neutral' is most commonly (if not exclusively) used to describe tonal balance.
No speaker can be truly neutral of course, but ideally it neither adds, nor takes anything away - from any
aspect of the sound.
Music is punchy. If a speaker "doesn't sound punchy" then it is unquestionably not neutral - it is taking something away from the music.
I know it's a controversial statement (especially to those that favour a warm, 'safe', 'forgiving' or a non-punchy sound but .....to me, anything less than neutral is wrong.....and that means the sound must
contain as much punchiness as the music itself does.
I suppose some might say a speaker can sound too 'punchy'.....for their taste maybe, but it can't add any punchiness that isn't in the music....can it?