Originally Posted by i like guitars
i have a head that has 100W output, is it okay to use it on a single 12" cab with a power rating of 50W??? im not gonna cranking it up high but im afraid it might blow up.
Generally yes, if you're careful with the master volume on your amplifier. Running a lower power speaker with a higher power head will usually give you speaker clipping before power amp clipping occurs. Can be good or bad depending on the sound you're after.