Hi, First off, I'm using a SWR 400 watt 4 ohm max amp. I have a GK 4x10 cab which has all the speakers replaced with Fender replacement speakers. When I first got this rig I quickly discovered that 3 of the speakers are 8 ohms and 1 is 16 ohms. Whith all these wired up the amp would cut out and go into circuit protection mode or something. Thank God it didn't break the amp. So anyway, after discovering this DURING my first band practice, I decided to just disconnect 1 of the 8 ohm speakers and just run the 16 and two 8 ohm'ers. This worked great, but I don't know if it's actually safe to do long term. 2 band practiced later, 1 of my 8 ohm speakers tears the cone and I have a terrible buzzing sound. So I went in and disconnected that one and connected the other 8 ohm I had disconnected from before. I'm back in business(for now at least). So I'm wondering if my jerry-rigged cab is pushing my 8 ohm speakers to hard and that's why one blew. Thanks for any advice.