I traded a guitar for a 1986 JCM800 4010 a while back. Very good condition and sounded great except was not in love with the original 12m-70 speaker. Also it needed to be really cranked to sound great. Therefore I countinued mostly playing through my JVM410HJS because it sounds pretty good even at lower volumes. Today I switched out the speaker in the 4010 to a Creamback 12m 65. Much better! Earlier I also retubed it. Today I discovered the Low input and was surprised at how good cleans sound. I also found out how well the low input takes pedals. It sounds great! I ran the preamp volume up all the way up and put a delay pedal and a Fulltone Full Drive 2 in front of it and it sounds fantastic! And even at lower volumes. Very nice amp and I think I will be giving it a lot more play time.