Quoted from tommyp:He has a valid point. Crap in, louder crap out. Speakers will affect it to a degree, but the soundtrack will play a large part.
I cannot agree more, new sounds and soundboard is a must.
I think everything is resumed in Schwaggs' response:
https://pinside.com/pinball/forum/topic/terminator-2-clubmembers-only/page/71#post-2582597