Loud pop right speaker, no right channel sound

All amp tubes still have light in them.  No sound from right speaker.  Could it be right channel fuse in the amp even though all tubes are lit?   Or, is there a fuse in the speaker? Meadow Lark Osprey Gen 2.  They’re old but great. I’ve had amp fuses pop before but the associated amp tubes would be dark. 
==> Is there a fuse in the speaker? Huh?  Oh did something else blow in the speaker?