1993—Merton Shatzkin, in his orchestration text, says the following about trombone

“When higher notes are played loudly, the tone becomes stentorian. Played softly, the sound is more blendeing and has a granitelike smoothness….Loud, low tones can have a snarling effect, as the beginning of Sibelius’s Finlandia demonstrates. Staccatos can be very imposing (Shatzkin 85).