Hi. I'm thinking of adding a 2nd 8ohm cab to my rig to give me more vol etc. I currently have one 8ohm sbx410 connected to a 4ohm "AMP' 400 watt amp. I would go with Avatar but they don't make a 4ohm 1x15. MSC & Seismic both make a cheap 1x15 cab ($109), with very similar specs. For that price you can't go too far wrong but which would you choose? Cheers!