As far as i know speaker mismatch is not so much of a problem in Solid State amps. But is it like that? I have a 20W (SS) Marshall and i want to connect it's speaker terminals on my twin's 2x12. The Marshall has an 8Ohm speaker and the twin has 4Ohm total load. Of course i can always disconnect one of the two 12" and have an 8Ohm load, but i want to know how safe it is to run it on 4Ohms, either for the amp or for the speakers.