I've tried using two different mobile boxes on single side band, and they both sound like absolute garbage on SSB. A fatboy and one from RM Italy both sound good on AM, but flip them to SSB and it sounds over-modulated, off frequency, and like it wants to cut out between words even though the relays aren't kicking off. I did check to make sure that they were actually set to SSB so I was not sending an SSB signal through a box set to AM. Turn the linear off altogether and the radio by itself on SSB sounds crystal clear.

Do most linears sound bad on single side band?