I use MameWah (hell ya), ZSNESW, VirtuaNES and MAME32 and the sound for all but Mame32 sounds great when the speakers are at a set volume. Mame32 though, is very quiet in all the games I've got.
For my cab, going in and changing the speaker volume just for arcade games is annoying.
Am I missing a volume setting in Mame32?