The JCM900 1x12 combos, and 80's 1x12 combos like the 2554 and the Studio 15, weighed slightly less than 50 lbs with an H magnet speaker. So about 45 lbs with an M magnet speaker. The mini Jubilee combo weighs about 40 lbs, and it has a M magnet speaker. A small (not OS) ply 1x12 cab weighs about 30 lbs with a H magnet speaker. A 900 head weighs about 40 lbs. A studio head weighs about 22 lbs. A 1936 2x12 weighs 55 lbs. A smaller ply 2x12 (THD , 1922...) weighs about 45 lbs with H magnet speakers. MDF and particle board cabs weigh noticeably more than equivalent ply and most solid wood cabs. The DSL40CR weighs 50 lbs with an M magnet speaker.