I have a swr 750x head and I have a classic ampeg 4x10 500watts 8ohm and also I have a 1x15 accoustic speaker as well and its 250 or 200 watts not sure and I don't think it has ohm but it's not for acoustic bass just that's the brand for the speaker. So I want to know if its a good idea to connect those 2 speakers to my swr 750x head.
I wouldn't, but it shouldn't hurt anything, (except maybe the 15, as it's the "weak link" in that rig) If you can, sell the 15 and get another 8 ohm 410, just like the one you have. Now, that'll be a killer rig.