I think it is an audiofool term no matter where you use it. If want to say the midrange was forward then say it. To many people warm means colored, a lack of mids. Words like harsh, grating, forward, indistinct, clear, unclear, distorted, hollow, nasally, detailed, wide, narrow,etc are real terms with real meanings and should only be used when describing the sound of a speaker or any piece of audio gear.