Arcade machine sound

[ultimate7]

I only play my arcade machine every couple months.  Yesterday when I turned it on it was noticely louder than normal, to the point of being annoying.  Any idea of what would cause this, I don't want to disconnect the speaker because I want the sound on when I play, I just want it quieter.

[Shooty]

turn the volume knob counter clockwise.

[fightonusc]

Kick down the jams, mother fuckers!

[Gantry]

No clue, as I haven't hooked up the speaker since 2002...

[ultimate7]

I assume there is no volume control, but I guess I'll take a closer look at the inside

[Gantry]

Actually, I definitely don't have a volume control on mine, or I couldn't find it.  We disconnected the speaker because it was so loud...